1. In the Google Cloud console, go to theAPI supply chain page inAPI hub.

   Go to API hub
2. ClickCreate dependency and provide the following inputs in theCreate a new dependency page.
3. UnderGeneral details, do the following:
   1. Specify unique ID: (Optional) The identifier of the dependency. If not provided, a system-generated ID will be used.Note: Dependency ID must be 4-500 characters long and can contain only uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), and hyphens (-). The ID forms the last part of the API resource name:projects/PROJECT/locations/LOCATION/dependencies/DEPENDENCY_ID.
   2. Description: (Optional) A brief description of the dependency.
   3. ClickContinue.
4. UnderSelect supplier resource, do the following:
   1. Resource type: SelectOperation as the supplier resource type.
   2. Supplier API: Select the API that supplies the operation.
   3. Version: Select the API version of the supplier API that provides the operation.
   4. Operation: Select the operation that is supplied to the consumer. For example:GET-/items.
   5. ClickContinue.
   Note:To use external APIs to create dependencies, you must use theDependencies API. For more information, see theREST API tab.
5. UnderSelect consumer resource, do the following:
   1. Resource type: SelectOperation as the consumer resource type.
   2. Consumer API: Select the API that consumes the operation.
   3. Version: Select the API version of the consumer API that consumes the operation.
   4. Operation: Select the operation that is consumed by the supplier. For example:GET-/categories.
   5. ClickContinue.
6. Optionally, provide values for any user-defined attributes that were defined in Settings.
7. ClickCreate. The new dependency appears in theAPI supply chain page.

REST API

To create a new dependency using theCreate a dependency API, use the following command:

  curl -X POST 'https://apihub.googleapis.com/v1/projects/HUB_PROJECT/locations/HUB_LOCATION/dependencies?dependency_id=DEPENDENCY_ID' \  -H "Authorization: Bearer $(gcloud auth print-access-token)" \  -H 'Content-Type: application/json' \  --d '{      "description": "DESCRIPTION",      "supplier": {          // Specify one of the following:          "operation_resource_name":RESOURCE_NAME          // OR          "external_api_resource_name:RESOURCE_NAME"      },      "consumer": {        // Specify one of the following:        "operation_resource_name":RESOURCE_NAME        // OR        "external_api_resource_name:RESOURCE_NAME"      }  }'

Replace the following:

• HUB_PROJECT: The name of your API hub host project. The host project was selected when API hub was provisioned.
• HUB_LOCATION: The location of the host project. The location was chosen when API hub was provisioned.
• DEPENDENCY_ID: (Optional) The identifier of the dependency. If not provided, a system-generated ID will be used.Note: The ID must be 4-500 characters, and valid characters are/[A-Z][a-z][0-9]-/. The ID is the last component of the fully qualified, unique API resource name, which is in the format:projects/PROJECT/locations/LOCATION/dependencies/DEPENDENCY_ID
• DESCRIPTION: (Optional) A brief description of the dependency.

• RESOURCE_NAME: (Required) Either the resource name of an operation in API hub or an external API, depending on which attribute you specify.

  Operation resource names follow this format:projects/PROJECT/locations/LOCATION/apis/API/versions/VERSION/operations/OPERATION

  Operation resource example:"projects/myproject/locations/us-central1/apis/payments-api/versions/locationv1/operations/getlocation".

  External API resource names follow this format:projects/PROJECT/locations/LOCATION/externalApis/EXTERNAL_API

  External API resource example:"projects/myproject/locations/us-central1/externalApis/petstore".

Example:

  curl -X POST 'https://apihub.googleapis.com/v1/projects/myproject/locations/us-central1/dependencies?dependency_id=user-to-pet' \  -H "Authorization: Bearer $(gcloud auth print-access-token)" \  -H 'Content-Type: application/json' \  --d '{      "description": "Dependency from user to pet API",      "consumer": {          "operation_resource_name": "projects/myproject/locations/us-central1/apis/payments-api/versions/paymentv1/operations/createuser"      },      "supplier": {          "operation_resource_name": "projects/myproject/locations/us-central1/apis/pet-api/versions/petstorev1/operations/addpet"      }  }'

{  "name": "projects/myproject/locations/us-central1/dependencies/user-to-pet",  "consumer": {      "displayName": "POST - /v2/user",      "operationResourceName": "projects/myproject/locations/us-central1/apis/payments-api/versions/version1/operations/createuser"  },  "supplier": {      "displayName": "POST - /v2/pet",      "operationResourceName": "projects/myproject/locations/us-central1/apis/payments-api/versions/version1/operations/addpet"  },  "state": "VALIDATED",  "description": "Dependency from user to pet API",  "discoveryMode": "MANUAL",  "createTime": "2024-04-17T19:33:31.664226Z",  "updateTime": "2024-04-17T19:33:31.664226Z" }