diff --git a/etc/schemas/arduino-package-index-definitions-schema.json b/etc/schemas/arduino-package-index-definitions-schema.json
index cd618b45..d5205a61 100644
--- a/etc/schemas/arduino-package-index-definitions-schema.json
+++ b/etc/schemas/arduino-package-index-definitions-schema.json
@@ -455,6 +455,9 @@
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/permissive/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/permissive/object"
                     }
                   },
                   "additionalProperties": false
@@ -510,6 +513,9 @@
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/specification/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/specification/object"
                     }
                   },
                   "additionalProperties": false
@@ -565,6 +571,9 @@
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/strict/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/strict/object"
                     }
                   },
                   "additionalProperties": false
@@ -1084,6 +1093,83 @@
           }
         }
       },
+      "monitorDependencies": {
+        "base": {
+          "object": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "required": ["packager", "name"]
+            }
+          }
+        },
+        "permissive": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/permissive/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/permissive/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        },
+        "specification": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/specification/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/specification/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        },
+        "strict": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/strict/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/strict/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        }
+      },
       "packager": {
         "base": {
           "object": {
diff --git a/internal/project/packageindex/packageindexschemas_test.go b/internal/project/packageindex/packageindexschemas_test.go
index 44422da8..c069e287 100644
--- a/internal/project/packageindex/packageindexschemas_test.go
+++ b/internal/project/packageindex/packageindexschemas_test.go
@@ -71,6 +71,12 @@ var validIndexRaw = []byte(`
 							"packager": "arduino",
 							"name": "ble-discovery"
 						}
+					],
+					"monitorDependencies": [
+						{
+							"packager": "arduino",
+							"name": "network-monitor"
+						}
 					]
 				}
 			],
@@ -152,6 +158,14 @@ func TestMinLength(t *testing.T) {
 		{"/packages/0/platforms/0/discoveryDependencies/0/name", 1, compliancelevel.Specification},
 		{"/packages/0/platforms/0/discoveryDependencies/0/name", 1, compliancelevel.Strict},
 
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", 1, compliancelevel.Permissive},
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", 1, compliancelevel.Specification},
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", 1, compliancelevel.Strict},
+
+		{"/packages/0/platforms/0/monitorDependencies/0/name", 1, compliancelevel.Permissive},
+		{"/packages/0/platforms/0/monitorDependencies/0/name", 1, compliancelevel.Specification},
+		{"/packages/0/platforms/0/monitorDependencies/0/name", 1, compliancelevel.Strict},
+
 		{"/packages/0/tools/0/systems/0/archiveFileName", 1, compliancelevel.Permissive},
 		{"/packages/0/tools/0/systems/0/archiveFileName", 1, compliancelevel.Specification},
 		{"/packages/0/tools/0/systems/0/archiveFileName", 1, compliancelevel.Strict},
@@ -303,6 +317,18 @@ func TestRequired(t *testing.T) {
 		{"/packages/0/platforms/0/discoveryDependencies/0/name", compliancelevel.Specification, assert.True},
 		{"/packages/0/platforms/0/discoveryDependencies/0/name", compliancelevel.Strict, assert.True},
 
+		{"/packages/0/platforms/0/monitorDependencies", compliancelevel.Permissive, assert.False},
+		{"/packages/0/platforms/0/monitorDependencies", compliancelevel.Specification, assert.False},
+		{"/packages/0/platforms/0/monitorDependencies", compliancelevel.Strict, assert.False},
+
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", compliancelevel.Permissive, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", compliancelevel.Specification, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", compliancelevel.Strict, assert.True},
+
+		{"/packages/0/platforms/0/monitorDependencies/0/name", compliancelevel.Permissive, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/name", compliancelevel.Specification, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/name", compliancelevel.Strict, assert.True},
+
 		{"/packages/0/tools/0/name", compliancelevel.Permissive, assert.True},
 		{"/packages/0/tools/0/name", compliancelevel.Specification, assert.True},
 		{"/packages/0/tools/0/name", compliancelevel.Strict, assert.True},
@@ -586,6 +612,9 @@ func TestType(t *testing.T) {
 		{"/packages/0/platforms/0/discoveryDependencies", 42, assert.True},
 		{"/packages/0/platforms/0/discoveryDependencies/0/packager", 42, assert.True},
 		{"/packages/0/platforms/0/discoveryDependencies/0/name", 42, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies", 42, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/packager", 42, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0/name", 42, assert.True},
 		{"/packages/0/tools", 42, assert.True},
 		{"/packages/0/tools/0/name", 42, assert.True},
 		{"/packages/0/tools/0/version", 42, assert.True},
@@ -717,6 +746,10 @@ func TestAdditionalProperties(t *testing.T) {
 		{"/packages/0/platforms/0/discoveryDependencies/0", compliancelevel.Specification, assert.True},
 		{"/packages/0/platforms/0/discoveryDependencies/0", compliancelevel.Strict, assert.True},
 
+		{"/packages/0/platforms/0/monitorDependencies/0", compliancelevel.Permissive, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0", compliancelevel.Specification, assert.True},
+		{"/packages/0/platforms/0/monitorDependencies/0", compliancelevel.Strict, assert.True},
+
 		{"/packages/0/tools/0", compliancelevel.Permissive, assert.True},
 		{"/packages/0/tools/0", compliancelevel.Specification, assert.True},
 		{"/packages/0/tools/0", compliancelevel.Strict, assert.True},
diff --git a/internal/project/projectdata/packageindex.go b/internal/project/projectdata/packageindex.go
index 9a77ba28..c9d514f8 100644
--- a/internal/project/projectdata/packageindex.go
+++ b/internal/project/projectdata/packageindex.go
@@ -46,6 +46,7 @@ func InitializeForPackageIndex() {
 	packageIndexBoards = nil
 	packageIndexToolsDependencies = nil
 	packageIndexDiscoveryDependencies = nil
+	packageIndexMonitorDependencies = nil
 	packageIndexTools = nil
 	packageIndexSystems = nil
 	packageIndexSchemaValidationResult = nil
@@ -54,22 +55,14 @@ func InitializeForPackageIndex() {
 
 		for _, packageData := range PackageIndexPackages() {
 			packageIndexPlatforms = append(packageIndexPlatforms, getPackageIndexData(packageData.Object, packageData.JSONPointer, "platforms", packageData.ID, ":{{index . 0}}@{{index . 1}}", []string{"architecture", "version"})...)
+			packageIndexTools = append(packageIndexTools, getPackageIndexData(packageData.Object, packageData.JSONPointer, "tools", packageData.ID, ":{{index . 0}}@{{index . 1}}", []string{"name", "version"})...)
 		}
 
 		for _, platformData := range PackageIndexPlatforms() {
 			packageIndexBoards = append(packageIndexBoards, getPackageIndexData(platformData.Object, platformData.JSONPointer, "boards", platformData.ID, " >> {{index . 0}}", []string{"name"})...)
-		}
-
-		for _, platformData := range PackageIndexPlatforms() {
 			packageIndexToolsDependencies = append(packageIndexToolsDependencies, getPackageIndexData(platformData.Object, platformData.JSONPointer, "toolsDependencies", platformData.ID, " >> {{index . 0}}:{{index . 1}}@{{index . 2}}", []string{"packager", "name", "version"})...)
-		}
-
-		for _, platformData := range PackageIndexPlatforms() {
 			packageIndexDiscoveryDependencies = append(packageIndexDiscoveryDependencies, getPackageIndexData(platformData.Object, platformData.JSONPointer, "discoveryDependencies", platformData.ID, " >> {{index . 0}}:{{index . 1}}", []string{"packager", "name"})...)
-		}
-
-		for _, packageData := range PackageIndexPackages() {
-			packageIndexTools = append(packageIndexTools, getPackageIndexData(packageData.Object, packageData.JSONPointer, "tools", packageData.ID, ":{{index . 0}}@{{index . 1}}", []string{"name", "version"})...)
+			packageIndexMonitorDependencies = append(packageIndexMonitorDependencies, getPackageIndexData(platformData.Object, platformData.JSONPointer, "monitorDependencies", platformData.ID, " >> {{index . 0}}:{{index . 1}}", []string{"packager", "name"})...)
 		}
 
 		for _, toolData := range PackageIndexTools() {
@@ -136,6 +129,13 @@ func PackageIndexDiscoveryDependencies() []PackageIndexData {
 	return packageIndexDiscoveryDependencies
 }
 
+var packageIndexMonitorDependencies []PackageIndexData
+
+// PackageIndexMonitorDependencies returns the slice of pluggable monitor tool dependency data for the package index.
+func PackageIndexMonitorDependencies() []PackageIndexData {
+	return packageIndexMonitorDependencies
+}
+
 var packageIndexTools []PackageIndexData
 
 // PackageIndexTools returns the slice of tool data for the package index.
diff --git a/internal/project/projectdata/packageindex_test.go b/internal/project/projectdata/packageindex_test.go
index e7f9424e..cb037f88 100644
--- a/internal/project/projectdata/packageindex_test.go
+++ b/internal/project/projectdata/packageindex_test.go
@@ -52,6 +52,8 @@ func TestInitializeForPackageIndex(t *testing.T) {
 		packageIndexToolsDependenciesDataAssertion     []PackageIndexData
 		packageIndexDiscoveryDependenciesAssertion     assert.ValueAssertionFunc
 		packageIndexDiscoveryDependenciesDataAssertion []PackageIndexData
+		packageIndexMonitorDependenciesAssertion       assert.ValueAssertionFunc
+		packageIndexMonitorDependenciesDataAssertion   []PackageIndexData
 		packageIndexToolsAssertion                     assert.ValueAssertionFunc
 		packageIndexToolsDataAssertion                 []PackageIndexData
 		packageIndexSystemsAssertion                   assert.ValueAssertionFunc
@@ -187,6 +189,29 @@ func TestInitializeForPackageIndex(t *testing.T) {
 					JSONPointer: "/packages/1/platforms/1/discoveryDependencies/0",
 				},
 			},
+			packageIndexMonitorDependenciesAssertion: assert.NotNil,
+			packageIndexMonitorDependenciesDataAssertion: []PackageIndexData{
+				{
+					ID:          "foopackager1:avr@1.0.1 >> arduino:network-monitor",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/0",
+				},
+				{
+					ID:          "foopackager1:avr@1.0.1 >> barpackager:coop-monitor",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/1",
+				},
+				{
+					ID:          "foopackager2:samd@2.0.0 >> arduino:network-monitor",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/0",
+				},
+				{
+					ID:          "foopackager2:samd@2.0.0 >> bazpackager:flag-monitor",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/1",
+				},
+				{
+					ID:          "foopackager2:mbed@1.1.1 >> quxpackager:shoe-monitor",
+					JSONPointer: "/packages/1/platforms/1/monitorDependencies/0",
+				},
+			},
 			packageIndexToolsAssertion: assert.NotNil,
 			packageIndexToolsDataAssertion: []PackageIndexData{
 				{
@@ -400,6 +425,53 @@ func TestInitializeForPackageIndex(t *testing.T) {
 					JSONPointer: "/packages/1/platforms/2/discoveryDependencies/2",
 				},
 			},
+			packageIndexMonitorDependenciesAssertion: assert.NotNil,
+			packageIndexMonitorDependenciesDataAssertion: []PackageIndexData{
+				{
+					ID:          "/packages/0/platforms/0/monitorDependencies/0",
+					JSONPointer: "/packages/0/platforms/0/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/0/platforms/0/monitorDependencies/1",
+					JSONPointer: "/packages/0/platforms/0/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/0/platforms/1/monitorDependencies/0",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/0/platforms/1/monitorDependencies/1",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/0/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/0/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/1/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/1/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/1/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/1/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/2/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/2/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/1",
+				},
+				{
+					ID:          "foopackager2:megaavr@1.0.0 >> quxpackager:shoe-monitor",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/2",
+				},
+			},
 			packageIndexToolsAssertion: assert.NotNil,
 			packageIndexToolsDataAssertion: []PackageIndexData{
 				{
@@ -621,6 +693,53 @@ func TestInitializeForPackageIndex(t *testing.T) {
 					JSONPointer: "/packages/1/platforms/2/discoveryDependencies/2",
 				},
 			},
+			packageIndexMonitorDependenciesAssertion: assert.NotNil,
+			packageIndexMonitorDependenciesDataAssertion: []PackageIndexData{
+				{
+					ID:          "/packages/0/platforms/0/monitorDependencies/0",
+					JSONPointer: "/packages/0/platforms/0/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/0/platforms/0/monitorDependencies/1",
+					JSONPointer: "/packages/0/platforms/0/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/0/platforms/1/monitorDependencies/0",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/0/platforms/1/monitorDependencies/1",
+					JSONPointer: "/packages/0/platforms/1/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/0/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/0/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/0/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/1/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/1/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/1/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/1/monitorDependencies/1",
+				},
+				{
+					ID:          "/packages/1/platforms/2/monitorDependencies/0",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/0",
+				},
+				{
+					ID:          "/packages/1/platforms/2/monitorDependencies/1",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/1",
+				},
+				{
+					ID:          "foopackager2:megaavr@1.0.0 >> quxpackager:shoe-monitor",
+					JSONPointer: "/packages/1/platforms/2/monitorDependencies/2",
+				},
+			},
 			packageIndexToolsAssertion: assert.NotNil,
 			packageIndexToolsDataAssertion: []PackageIndexData{
 				{
@@ -672,6 +791,7 @@ func TestInitializeForPackageIndex(t *testing.T) {
 			packageIndexBoardsAssertion:                 assert.Nil,
 			packageIndexToolsDependenciesAssertion:      assert.Nil,
 			packageIndexDiscoveryDependenciesAssertion:  assert.Nil,
+			packageIndexMonitorDependenciesAssertion:    assert.Nil,
 			packageIndexToolsAssertion:                  assert.Nil,
 			packageIndexSystemsAssertion:                assert.Nil,
 			packageIndexSchemaValidationResultAssertion: assert.Nil,
@@ -687,6 +807,7 @@ func TestInitializeForPackageIndex(t *testing.T) {
 			packageIndexBoardsAssertion:                 assert.Nil,
 			packageIndexToolsDependenciesAssertion:      assert.Nil,
 			packageIndexDiscoveryDependenciesAssertion:  assert.Nil,
+			packageIndexMonitorDependenciesAssertion:    assert.Nil,
 			packageIndexToolsAssertion:                  assert.Nil,
 			packageIndexSystemsAssertion:                assert.Nil,
 			packageIndexSchemaValidationResultAssertion: assert.Nil,
@@ -748,6 +869,14 @@ func TestInitializeForPackageIndex(t *testing.T) {
 			}
 		}
 
+		testTable.packageIndexMonitorDependenciesAssertion(t, PackageIndexMonitorDependencies(), testTable.testName)
+		if PackageIndexMonitorDependencies() != nil {
+			for index, packageIndexMonitorDependency := range PackageIndexMonitorDependencies() {
+				assert.Equal(t, testTable.packageIndexMonitorDependenciesDataAssertion[index].ID, packageIndexMonitorDependency.ID, testTable.testName)
+				assert.Equal(t, testTable.packageIndexMonitorDependenciesDataAssertion[index].JSONPointer, packageIndexMonitorDependency.JSONPointer, testTable.testName)
+			}
+		}
+
 		testTable.packageIndexToolsAssertion(t, PackageIndexTools(), testTable.testName)
 		if PackageIndexTools() != nil {
 			for index, packageIndexTool := range PackageIndexTools() {
diff --git a/internal/project/projectdata/testdata/packageindexes/empty-ids/package_foo_index.json b/internal/project/projectdata/testdata/packageindexes/empty-ids/package_foo_index.json
index 076738e3..01280d55 100644
--- a/internal/project/projectdata/testdata/packageindexes/empty-ids/package_foo_index.json
+++ b/internal/project/projectdata/testdata/packageindexes/empty-ids/package_foo_index.json
@@ -43,6 +43,16 @@
               "packager": "barpackager",
               "name": "carrier-pigeon-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "barpackager",
+              "name": "coop-monitor"
+            }
           ]
         },
         {
@@ -79,6 +89,16 @@
               "packager": "barpackager",
               "name": "carrier-pigeon-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "barpackager",
+              "name": "coop-monitor"
+            }
           ]
         }
       ],
@@ -127,6 +147,16 @@
               "packager": "bazpackager",
               "name": "signal-flag-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager",
+              "name": "flag-monitor"
+            }
           ]
         },
         {
@@ -163,6 +193,16 @@
               "packager": "bazpackager",
               "name": "signal-flag-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager",
+              "name": "flag-monitor"
+            }
           ]
         },
         {
@@ -211,6 +251,18 @@
               "packager": "quxpackager",
               "name": "sneakernet-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager"
+            },
+            {
+              "packager": "quxpackager",
+              "name": "shoe-monitor"
+            }
           ]
         }
       ],
diff --git a/internal/project/projectdata/testdata/packageindexes/missing-ids/package_foo_index.json b/internal/project/projectdata/testdata/packageindexes/missing-ids/package_foo_index.json
index ea1b5622..a4b9acf4 100644
--- a/internal/project/projectdata/testdata/packageindexes/missing-ids/package_foo_index.json
+++ b/internal/project/projectdata/testdata/packageindexes/missing-ids/package_foo_index.json
@@ -42,6 +42,16 @@
               "packager": "barpackager",
               "name": "carrier-pigeon-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "barpackager",
+              "name": "coop-monitor"
+            }
           ]
         },
         {
@@ -78,6 +88,16 @@
               "packager": "barpackager",
               "name": "carrier-pigeon-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "barpackager",
+              "name": "coop-monitor"
+            }
           ]
         }
       ],
@@ -125,6 +145,16 @@
               "packager": "bazpackager",
               "name": "signal-flag-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager",
+              "name": "flag-monitor"
+            }
           ]
         },
         {
@@ -160,6 +190,16 @@
               "packager": "bazpackager",
               "name": "signal-flag-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager",
+              "name": "flag-monitor"
+            }
           ]
         },
         {
@@ -205,6 +245,18 @@
               "packager": "quxpackager",
               "name": "sneakernet-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager"
+            },
+            {
+              "packager": "quxpackager",
+              "name": "shoe-monitor"
+            }
           ]
         }
       ],
diff --git a/internal/project/projectdata/testdata/packageindexes/valid-package-index/package_foo_index.json b/internal/project/projectdata/testdata/packageindexes/valid-package-index/package_foo_index.json
index 67181764..49e667f3 100644
--- a/internal/project/projectdata/testdata/packageindexes/valid-package-index/package_foo_index.json
+++ b/internal/project/projectdata/testdata/packageindexes/valid-package-index/package_foo_index.json
@@ -69,6 +69,16 @@
               "packager": "barpackager",
               "name": "carrier-pigeon-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "barpackager",
+              "name": "coop-monitor"
+            }
           ]
         }
       ],
@@ -117,6 +127,16 @@
               "packager": "bazpackager",
               "name": "signal-flag-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": "network-monitor"
+            },
+            {
+              "packager": "bazpackager",
+              "name": "flag-monitor"
+            }
           ]
         },
         {
@@ -149,6 +169,12 @@
               "packager": "quxpackager",
               "name": "sneakernet-discovery"
             }
+          ],
+          "monitorDependencies": [
+            {
+              "packager": "quxpackager",
+              "name": "shoe-monitor"
+            }
           ]
         }
       ],
diff --git a/internal/rule/ruleconfiguration/ruleconfiguration.go b/internal/rule/ruleconfiguration/ruleconfiguration.go
index 5c861f77..e162284e 100644
--- a/internal/rule/ruleconfiguration/ruleconfiguration.go
+++ b/internal/rule/ruleconfiguration/ruleconfiguration.go
@@ -4700,6 +4700,142 @@ var configurations = []Type{
 		ErrorModes:       []rulemode.Type{rulemode.Default},
 		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsDiscoveryDependenciesNameLTMinLength,
 	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL067",
+		Brief:            "incorrect packages[*].platforms[*].monitorDependencies type",
+		Description:      "The package index has a platform with a `monitorDependencies` property of incorrect type.",
+		MessageTemplate:  "packages[*].platforms[*].monitorDependencies property has incorrect type in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesIncorrectType,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL068",
+		Brief:            "unrecognized properties in packages[*].platforms[*].monitorDependencies[*]",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms contains unknown data properties.",
+		MessageTemplate:  "Unknown properties under packages[*].platforms[*].monitorDependencies[*] found in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesAdditionalProperties,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL069",
+		Brief:            "packages[*].platforms[*].monitorDependencies[*].packager missing",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms is missing a `packager` property.",
+		MessageTemplate:  "Missing packages[*].platforms[*].monitorDependencies[*].packager property in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesPackagerMissing,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL070",
+		Brief:            "incorrect packages[*].platforms[*].monitorDependencies[*].packager type",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms has a `packager` property of incorrect type.",
+		MessageTemplate:  "packages[*].platforms[*].monitorDependencies[*].packager property has incorrect type in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesPackagerIncorrectType,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL071",
+		Brief:            "packages[*].platforms[*].monitorDependencies[*].packager < min length",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms has a `packager` property shorter than the minimum length.",
+		MessageTemplate:  "packages[*].platforms[*].monitorDependencies[*].packager value less than the minimum length in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesPackagerLTMinLength,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL072",
+		Brief:            "packages[*].platforms[*].monitorDependencies[*].name missing",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms is missing a `name` property.",
+		MessageTemplate:  "Missing packages[*].platforms[*].monitorDependencies[*].name property in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesNameMissing,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL073",
+		Brief:            "incorrect packages[*].platforms[*].monitorDependencies[*].name type",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms has a `name` property of incorrect type.",
+		MessageTemplate:  "packages[*].platforms[*].monitorDependencies[*].name property has incorrect type in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesNameIncorrectType,
+	},
+	{
+		ProjectType:      projecttype.PackageIndex,
+		SuperprojectType: projecttype.All,
+		Category:         "data",
+		Subcategory:      "platform",
+		ID:               "IL074",
+		Brief:            "packages[*].platforms[*].monitorDependencies[*].name < min length",
+		Description:      "A `monitorDependencies` object for one of the package index's platforms has a `name` property shorter than the minimum length.",
+		MessageTemplate:  "packages[*].platforms[*].monitorDependencies[*].name value less than the minimum length in platform(s):\n{{.}}",
+		Reference:        "https://arduino.github.io/arduino-cli/latest/package_index_json-specification/#platforms-definitions",
+		DisableModes:     nil,
+		EnableModes:      []rulemode.Type{rulemode.Default},
+		InfoModes:        nil,
+		WarningModes:     nil,
+		ErrorModes:       []rulemode.Type{rulemode.Default},
+		RuleFunction:     rulefunction.PackageIndexPackagesPlatformsMonitorDependenciesNameLTMinLength,
+	},
 	{
 		ProjectType:      projecttype.PackageIndex,
 		SuperprojectType: projecttype.All,
diff --git a/internal/rule/rulefunction/packageindex.go b/internal/rule/rulefunction/packageindex.go
index f3f24c5b..601e6019 100644
--- a/internal/rule/rulefunction/packageindex.go
+++ b/internal/rule/rulefunction/packageindex.go
@@ -1936,6 +1936,166 @@ func PackageIndexPackagesPlatformsDiscoveryDependenciesNameLTMinLength() (result
 	return ruleresult.Pass, ""
 }
 
+// PackageIndexPackagesPlatformsMonitorDependenciesIncorrectType checks for incorrect type of the packages[].platforms[].monitorDependencies property.
+func PackageIndexPackagesPlatformsMonitorDependenciesIncorrectType() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, platformData := range projectdata.PackageIndexPlatforms() {
+		if schema.PropertyTypeMismatch(platformData.JSONPointer+"/monitorDependencies", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, platformData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesAdditionalProperties checks for additional properties in packages[].platforms[].monitorDependencies[].
+func PackageIndexPackagesPlatformsMonitorDependenciesAdditionalProperties() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.ProhibitedAdditionalProperties(dependencyData.JSONPointer, projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesPackagerMissing checks for missing packages[].platforms[].monitorDependencies[].packager property.
+func PackageIndexPackagesPlatformsMonitorDependenciesPackagerMissing() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.RequiredPropertyMissing(dependencyData.JSONPointer+"/packager", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesPackagerIncorrectType checks for incorrect type of the packages[].platforms[].monitorDependencies[].packager property.
+func PackageIndexPackagesPlatformsMonitorDependenciesPackagerIncorrectType() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.PropertyTypeMismatch(dependencyData.JSONPointer+"/packager", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesPackagerLTMinLength checks for packages[].platforms[].monitorDependencies[].packager property less than the minimum length.
+func PackageIndexPackagesPlatformsMonitorDependenciesPackagerLTMinLength() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.PropertyLessThanMinLength(dependencyData.JSONPointer+"/packager", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesNameMissing checks for missing packages[].platforms[].monitorDependencies[].name property.
+func PackageIndexPackagesPlatformsMonitorDependenciesNameMissing() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.RequiredPropertyMissing(dependencyData.JSONPointer+"/name", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesNameIncorrectType checks for incorrect type of the packages[].platforms[].monitorDependencies[].name property.
+func PackageIndexPackagesPlatformsMonitorDependenciesNameIncorrectType() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.PropertyTypeMismatch(dependencyData.JSONPointer+"/name", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
+// PackageIndexPackagesPlatformsMonitorDependenciesNameLTMinLength checks for packages[].platforms[].monitorDependencies[].name property less than the minimum length.
+func PackageIndexPackagesPlatformsMonitorDependenciesNameLTMinLength() (result ruleresult.Type, output string) {
+	if projectdata.PackageIndexLoadError() != nil {
+		return ruleresult.NotRun, "Error loading package index"
+	}
+
+	nonCompliantIDs := []string{}
+	for _, dependencyData := range projectdata.PackageIndexMonitorDependencies() {
+		if schema.PropertyLessThanMinLength(dependencyData.JSONPointer+"/name", projectdata.PackageIndexSchemaValidationResult()[compliancelevel.Specification]) {
+			nonCompliantIDs = append(nonCompliantIDs, dependencyData.ID)
+		}
+	}
+
+	if len(nonCompliantIDs) > 0 {
+		return ruleresult.Fail, brokenOutputList(nonCompliantIDs)
+	}
+
+	return ruleresult.Pass, ""
+}
+
 // PackageIndexPackagesToolsMissing checks for missing packages[].tools property.
 func PackageIndexPackagesToolsMissing() (result ruleresult.Type, output string) {
 	if projectdata.PackageIndexLoadError() != nil {
diff --git a/internal/rule/rulefunction/packageindex_test.go b/internal/rule/rulefunction/packageindex_test.go
index f396516a..4cd1c7ea 100644
--- a/internal/rule/rulefunction/packageindex_test.go
+++ b/internal/rule/rulefunction/packageindex_test.go
@@ -1013,6 +1013,86 @@ func TestPackageIndexPackagesPlatformsDiscoveryDependenciesNameLTMinLength(t *te
 	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsDiscoveryDependenciesNameLTMinLength, testTables, t)
 }
 
+func TestPackageIndexPackagesPlatformsMonitorDependenciesIncorrectType(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"Incorrect packages[].platforms[].monitorDependencies type", "packages-platforms-monitordependencies-incorrect-type", ruleresult.Fail, "^" + brokenOutputListIndent + "foopackager:avr@1\\.0\\.0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesIncorrectType, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesAdditionalProperties(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"Additional packages[].platforms[].monitorDependencies[] properties", "packages-platforms-monitordependencies-additional-properties", ruleresult.Fail, "^" + brokenOutputListIndent + "foopackager:avr@1\\.0\\.0 >> arduino:network-monitor$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesAdditionalProperties, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesPackagerMissing(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"packages[].platforms[].monitorDependencies[].packager missing", "packages-platforms-monitordependencies-packager-missing", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesPackagerMissing, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesPackagerIncorrectType(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"Incorrect packages[].platforms[].monitorDependencies[].packager type", "packages-platforms-monitordependencies-packager-incorrect-type", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesPackagerIncorrectType, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesPackagerLTMinLength(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"packages[].platforms[].monitorDependencies[].packager < min length", "packages-platforms-monitordependencies-packager-length-lt", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesPackagerLTMinLength, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesNameMissing(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"packages[].platforms[].monitorDependencies[].name missing", "packages-platforms-monitordependencies-name-missing", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesNameMissing, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesNameIncorrectType(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"Incorrect packages[].platforms[].monitorDependencies[].name type", "packages-platforms-monitordependencies-name-incorrect-type", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesNameIncorrectType, testTables, t)
+}
+
+func TestPackageIndexPackagesPlatformsMonitorDependenciesNameLTMinLength(t *testing.T) {
+	testTables := []packageIndexRuleFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
+		{"packages[].platforms[].monitorDependencies[].name < min length", "packages-platforms-monitordependencies-name-length-lt", ruleresult.Fail, "^" + brokenOutputListIndent + "/packages/0/platforms/0/monitorDependencies/0$"},
+		{"Valid", "valid-package-index", ruleresult.Pass, ""},
+	}
+
+	checkPackageIndexRuleFunction(PackageIndexPackagesPlatformsMonitorDependenciesNameLTMinLength, testTables, t)
+}
+
 func TestPackageIndexPackagesToolsMissing(t *testing.T) {
 	testTables := []packageIndexRuleFunctionTestTable{
 		{"Invalid JSON", "invalid-JSON", ruleresult.NotRun, ""},
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-additional-properties/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-additional-properties/package_foo_index.json
new file mode 100644
index 00000000..81bc5671
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-additional-properties/package_foo_index.json
@@ -0,0 +1,38 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "foo": "bar",
+              "packager": "arduino",
+              "name": "network-monitor"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-incorrect-type/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-incorrect-type/package_foo_index.json
new file mode 100644
index 00000000..03867989
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-incorrect-type/package_foo_index.json
@@ -0,0 +1,32 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": 42
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-incorrect-type/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-incorrect-type/package_foo_index.json
new file mode 100644
index 00000000..85ddd387
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-incorrect-type/package_foo_index.json
@@ -0,0 +1,37 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": 42
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-length-lt/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-length-lt/package_foo_index.json
new file mode 100644
index 00000000..8b4403cd
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-length-lt/package_foo_index.json
@@ -0,0 +1,37 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "packager": "arduino",
+              "name": ""
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-missing/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-missing/package_foo_index.json
new file mode 100644
index 00000000..ec72e5e7
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-name-missing/package_foo_index.json
@@ -0,0 +1,36 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "packager": "arduino"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-incorrect-type/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-incorrect-type/package_foo_index.json
new file mode 100644
index 00000000..398da7d3
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-incorrect-type/package_foo_index.json
@@ -0,0 +1,37 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "packager": 42,
+              "name": "network-monitor"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-length-lt/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-length-lt/package_foo_index.json
new file mode 100644
index 00000000..c7a71f05
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-length-lt/package_foo_index.json
@@ -0,0 +1,37 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "packager": "",
+              "name": "network-monitor"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-missing/package_foo_index.json b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-missing/package_foo_index.json
new file mode 100644
index 00000000..20197e7f
--- /dev/null
+++ b/internal/rule/rulefunction/testdata/packageindexes/packages-platforms-monitordependencies-packager-missing/package_foo_index.json
@@ -0,0 +1,36 @@
+{
+  "packages": [
+    {
+      "name": "foopackager",
+      "maintainer": "Jane Developer",
+      "websiteURL": "http://example.com",
+      "email": "jane@example.com",
+      "help": {
+        "online": "http://example.com"
+      },
+      "platforms": [
+        {
+          "name": "My Board",
+          "architecture": "avr",
+          "version": "1.0.0",
+          "category": "Contributed",
+          "help": {
+            "online": "http://example.com"
+          },
+          "url": "http://example.com",
+          "archiveFileName": "myboard-1.0.0.zip",
+          "checksum": "MD5:6c0f556759894aa1a45e8af423a08ce8",
+          "size": "15005",
+          "boards": [],
+          "toolsDependencies": [],
+          "monitorDependencies": [
+            {
+              "name": "network-monitor"
+            }
+          ]
+        }
+      ],
+      "tools": []
+    }
+  ]
+}
diff --git a/internal/rule/schema/schemadata/bindata.go b/internal/rule/schema/schemadata/bindata.go
index 9172a85f..2307c8d9 100644
--- a/internal/rule/schema/schemadata/bindata.go
+++ b/internal/rule/schema/schemadata/bindata.go
@@ -2987,6 +2987,9 @@ var _arduinoPackageIndexDefinitionsSchemaJson = []byte(`{
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/permissive/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/permissive/object"
                     }
                   },
                   "additionalProperties": false
@@ -3042,6 +3045,9 @@ var _arduinoPackageIndexDefinitionsSchemaJson = []byte(`{
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/specification/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/specification/object"
                     }
                   },
                   "additionalProperties": false
@@ -3097,6 +3103,9 @@ var _arduinoPackageIndexDefinitionsSchemaJson = []byte(`{
                     },
                     "discoveryDependencies": {
                       "$ref": "#/definitions/propertiesObjects/discoveryDependencies/strict/object"
+                    },
+                    "monitorDependencies": {
+                      "$ref": "#/definitions/propertiesObjects/monitorDependencies/strict/object"
                     }
                   },
                   "additionalProperties": false
@@ -3616,6 +3625,83 @@ var _arduinoPackageIndexDefinitionsSchemaJson = []byte(`{
           }
         }
       },
+      "monitorDependencies": {
+        "base": {
+          "object": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "required": ["packager", "name"]
+            }
+          }
+        },
+        "permissive": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/permissive/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/permissive/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        },
+        "specification": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/specification/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/specification/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        },
+        "strict": {
+          "object": {
+            "allOf": [
+              {
+                "$ref": "#/definitions/propertiesObjects/monitorDependencies/base/object"
+              },
+              {
+                "items": {
+                  "properties": {
+                    "packager": {
+                      "$ref": "#/definitions/propertiesObjects/packager/strict/object"
+                    },
+                    "name": {
+                      "$ref": "#/definitions/propertiesObjects/toolName/strict/object"
+                    }
+                  },
+                  "additionalProperties": false
+                }
+              }
+            ]
+          }
+        }
+      },
       "packager": {
         "base": {
           "object": {