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+---
+openapi: 3.0.3
+info:
+  title: Application Endpoints Registration
+  description: |
+    The Application Endpoints Registration API provides a programmable
+    interface for developers to register the endpoints of an application
+    which is deployed across various Edge Cloud Zones.
+    It allows developers to retrieve, update, and delete those registrations.
+
+    # Introduction
+
+    The API registers the Edge Application Endpoints.
+    This information can be used for various use cases like optimal endpoint
+    discovery to help end users connect to the most optimal instance of the
+    application which is distributed across various Edge Cloud Zones.
+    Additionally the information can be used to monitor the edge instances to
+    take decisions from a lifecycle management perspective. The API provides
+    the ability to register, read and manage the deployed edge instances of
+    the application.
+
+    # Relevant terms and definitions
+
+    * **Application Endpoint**:
+
+    The Endpoint on which the application is running.
+    It can be a URI, FQDN, IPv4, or IPv6 address with a port number.
+
+    # API functionality
+
+    The API provides 4 operations:
+    - POST registerApplicationEndpoints: Registers the Application Endpoints
+                    of a deployed application to a specified edge cloud zone.
+    - GET getAllRegisteredApplicationEndpoints: Returns endpoint information for
+      all registered Applications.
+    - GET getApplicationEndpointsByID: Returns endpoint information for all
+        Applications registered to a specified applicationEndpointId.
+    - PUT updateApplicationEndpoint: Update registered application endpoint
+        information.
+    - DELETE deregisterApplicationEndpoint: Deregister an application's
+                          application Endpoint from the edge cloud zone.
+
+    # Authorization and authentication
+
+    The "Camara Security and Interoperability Profile" provides details on
+    how a client requests an access token. Please refer to Identify and
+    Consent Management
+    (https://github.com/camaraproject/IdentityAndConsentManagement/)
+    for the released version of the Profile.
+
+    Which specific authorization flows are to be used will be determined
+    during onboarding process, happening between the API Client and the
+    Telco Operator exposing the API, taking into account the declared
+    purpose for accessing the API, while also being subject to the prevailing
+     legal framework dictated by local legislation.
+
+    It is important to remark that in cases where personal user data
+    is processed by the API, and users can exercise their rights through
+    mechanisms such as opt-in and/or opt-out, the use of 3-legged access
+    tokens becomes mandatory. This measure ensures that the API remains in
+    strict compliance with user privacy preferences and regulatory obligations,
+    upholding the principles of transparency and user-centric data control.
+
+    # Further info and support
+
+    [GSMA Mobile Connect Account Takeover Protection specification]
+    (https://www.gsma.com/identity/wp-content/uploads/2022/12/IDY.24-Mobile-
+    Connect-Account-Takeover-Protection-Definition-and-Technical-Requirements-
+    v2.0.pdf)
+    was used as source of input for this API. For more about Mobile Connect,
+    please see [Mobile Connect website](https://mobileconnect.io/).
+
+    (FAQs will be added in a later version of the documentation)
+
+  version: 0.1.0
+  contact:
+    email: sp-edc@lists.camaraproject.org
+  license:
+    name: Apache 2.0
+    url: https://www.apache.org/licenses/LICENSE-2.0.html
+  x-camara-commonalities: 0.4.0
+externalDocs:
+  description: Project documentation at Camara
+  url: https://github.com/camaraproject/EdgeCloud
+
+servers:
+  - url: "{apiRoot}/application-endpoint-registration/v0.1"
+    variables:
+      apiRoot:
+        default: http://localhost:9091
+        description: |
+          API root, defined by service provider, e.g.
+          `api.example.com` or `api.example.com/somepath`
+
+tags:
+  - name: Application Endpoint Registration
+    description: |
+      Operations to register, read and manage deployed instances of the
+      application.
+
+paths:
+  /application-endpoints:
+    post:
+      security:
+        - openId:
+            - application-endpoint-registration:application-endpoints:write
+      tags:
+        - Application Endpoint Registration
+      summary: Register endpoints of a deployed application
+      description: |
+        Register the endpoints of a deployed application
+        to a specified edge cloud zone.
+      operationId: registerApplicationEndpoints
+      parameters:
+        - $ref: "#/components/parameters/x-correlator"
+      requestBody:
+        description: Array of Application Endpoints for a
+          deployed application
+        required: true
+        content:
+          application/json:
+            schema:
+              type: array
+              minItems: 1
+              items:
+                $ref: "#/components/schemas/ApplicationEndpointRequest"
+      responses:
+        "200":
+          description: Returns an applicationEndpointsId
+          headers:
+            x-correlator:
+              $ref: '#/components/headers/x-correlator'
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ApplicationEndpointsId"
+        "400":
+          $ref: "#/components/responses/Generic400"
+        "401":
+          $ref: "#/components/responses/Generic401"
+        "403":
+          $ref: "#/components/responses/Generic403"
+        "404":
+          $ref: "#/components/responses/Generic404"
+        "422":
+          $ref: "#/components/responses/Generic422"
+        "500":
+          $ref: "#/components/responses/Generic500"
+        "503":
+          $ref: "#/components/responses/Generic503"
+        "504":
+          $ref: "#/components/responses/Generic504"
+    get:
+      security:
+        - openId:
+            - application-endpoint-registration:application-endpoints:read
+      tags:
+        - Application Endpoint Registration
+      summary: Get all registered edge application endpoint information
+      description: |
+        Returns endpoint information for all
+        Application Endpoints registered.
+      operationId: getAllRegisteredApplicationEndpoints
+      parameters:
+        - $ref: "#/components/parameters/x-correlator"
+      responses:
+        "200":
+          description: Array of registered Application Endpoints
+          headers:
+            x-correlator:
+              $ref: '#/components/headers/x-correlator'
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/ApplicationEndpoints"
+        "400":
+          $ref: "#/components/responses/Generic400"
+        "401":
+          $ref: "#/components/responses/Generic401"
+        "403":
+          $ref: "#/components/responses/Generic403"
+        "404":
+          $ref: "#/components/responses/Generic404"
+        "422":
+          $ref: "#/components/responses/Generic422"
+        "500":
+          $ref: "#/components/responses/Generic500"
+        "503":
+          $ref: "#/components/responses/Generic503"
+        "504":
+          $ref: "#/components/responses/Generic504"
+
+  "/application-endpoints/{applicationEndpointsId}":
+    parameters:
+      - name: applicationEndpointsId
+        in: path
+        required: true
+        description: The unique identifier for the application endpoints
+        schema:
+          $ref: "#/components/schemas/ApplicationEndpointsId"
+      - $ref: "#/components/parameters/x-correlator"
+    get:
+      security:
+        - openId:
+            - application-endpoint-registration:application-endpoints:read
+      tags:
+        - Application Endpoint Registration
+      summary: Get registered edge application endpoint information
+      description: |
+        Returns endpoint information for all
+        Application Endpoints registered to a
+        specified applicationEndpointId.
+      operationId: getApplicationEndpointsById
+      responses:
+        "200":
+          description: Array of registered Application Endpoints
+          headers:
+            x-correlator:
+              $ref: '#/components/headers/x-correlator'
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ApplicationEndpoints"
+        "400":
+          $ref: "#/components/responses/Generic400"
+        "401":
+          $ref: "#/components/responses/Generic401"
+        "403":
+          $ref: "#/components/responses/Generic403"
+        "404":
+          $ref: "#/components/responses/Generic404"
+        "422":
+          $ref: "#/components/responses/Generic422"
+        "500":
+          $ref: "#/components/responses/Generic500"
+        "503":
+          $ref: "#/components/responses/Generic503"
+        "504":
+          $ref: "#/components/responses/Generic504"
+
+    put:
+      security:
+        - openId:
+            - application-endpoint-registration:application-endpoints:update
+      tags:
+        - Application Endpoint Registration
+      summary: Update an application Endpoint
+      description: |
+        Update registered application Endpoint information.
+      operationId: updateApplicationEndpoint
+      requestBody:
+        description: Application Endpoint information
+        content:
+          application/json:
+            schema:
+              type: array
+              items:
+                $ref: "#/components/schemas/ApplicationEndpointRequest"
+      responses:
+        "204":
+          description: Updates Application Endpoint Information
+          headers:
+            x-correlator:
+              $ref: '#/components/headers/x-correlator'
+        "400":
+          $ref: "#/components/responses/Generic400"
+        "401":
+          $ref: "#/components/responses/Generic401"
+        "403":
+          $ref: "#/components/responses/Generic403"
+        "404":
+          $ref: "#/components/responses/Generic404"
+        "422":
+          $ref: "#/components/responses/Generic422"
+        "500":
+          $ref: "#/components/responses/Generic500"
+        "503":
+          $ref: "#/components/responses/Generic503"
+        "504":
+          $ref: "#/components/responses/Generic504"
+
+    delete:
+      security:
+        - openId:
+            - application-endpoint-registration:application-endpoints:delete
+      tags:
+        - Application Endpoint Registration
+      summary: Deregister an application Endpoint
+      description: |
+        Deregister an application's
+        Endpoint from the edge cloud zone.
+      operationId: deregisterApplicationEndpoint
+      responses:
+        "200":
+          description: Deregister Application Endpoint
+          headers:
+            x-correlator:
+              $ref: '#/components/headers/x-correlator'
+        "400":
+          $ref: "#/components/responses/Generic400"
+        "401":
+          $ref: "#/components/responses/Generic401"
+        "403":
+          $ref: "#/components/responses/Generic403"
+        "404":
+          $ref: "#/components/responses/Generic404"
+        "422":
+          $ref: "#/components/responses/Generic422"
+        "500":
+          $ref: "#/components/responses/Generic500"
+        "503":
+          $ref: "#/components/responses/Generic503"
+        "504":
+          $ref: "#/components/responses/Generic504"
+
+components:
+  securitySchemes:
+    openId:
+      description: OpenID Provider Configuration Information
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/.well-known/openid-configuration
+  parameters:
+    x-correlator:
+      name: x-correlator
+      in: header
+      description: Correlation id for the different services
+      schema:
+        type: string
+  headers:
+    x-correlator:
+      description: Correlation id for the different services
+      schema:
+        type: string
+
+  schemas:
+    ApplicationEndpointRequest:
+      description: Application instance represented
+        by the application Endpoint definition
+      type: object
+      properties:
+        applicationEndpoint:
+          $ref: "#/components/schemas/ResourcesApplicationEndpoint"
+        applicationServerProviderName:
+          type: string
+          description: Unique ID representing the Edge
+            Application Provider
+        applicationDescription:
+          type: string
+          description: Description of the application Endpoint
+        applicationProfileId:
+          $ref: "#/components/schemas/ApplicationProfileId"
+        edgeCloudZoneId:
+          $ref: "#/components/schemas/EdgeCloudZoneId"
+        edgeCloudZoneName:
+          $ref: "#/components/schemas/EdgeCloudZoneName"
+        edgeCloudProvider:
+          $ref: "#/components/schemas/EdgeCloudProvider"
+        edgeCloudRegionId:
+          $ref: "#/components/schemas/EdgeCloudRegionName"
+      required:
+        - applicationEndpoint
+        - applicationServerProviderName
+        - applicationProfileId
+        - edgeCloudZoneId
+        - edgeCloudZoneName
+        - edgeCloudProvider
+        - edgeCloudRegionId
+      additionalProperties: false
+    ApplicationEndpoints:
+      description: |
+        List of Application endpoints information
+        deployed across various cloud zones.
+      properties:
+        applicationEndpointsId:
+          $ref: "#/components/schemas/ApplicationEndpointsId"
+        applicationInstance:
+          description: |
+            Application Endpoint Information
+          type: array
+          items:
+            $ref: "#/components/schemas/ApplicationEndpointRequest"
+          minItems: 0
+    ResourcesApplicationEndpoint:
+      type: object
+      description: Resources of the Application Endpoint
+      properties:
+        uri:
+          type: string
+          description: URI of application Endpoint if available
+          format: uri
+        fqdn:
+          type: string
+          description: FQDN of application Endpoint if available
+        ipv4Address:
+          type: string
+          description: IPv4 Address of application Endpoint if available
+          format: ipv4
+          example: "203.0.113.10"
+        ipv6Address:
+          type: string
+          description: IPv6 Address of application Endpoint if available
+          format: ipv6
+          example: 2001:db8:85a3:8d3:1319:8a2e:370:7344
+        port:
+          type: integer
+          description: |
+            Port information of application Endpoint
+            if IPv4 or IPv6 is mentioned
+      anyOf:
+        - required: [fqdn, ipv4Address, port]
+        - required: [fqdn, ipv6Address, port]
+      example:
+        {
+          "ipv4Address": "203.0.113.10",
+          "port": 59765,
+          "fqdn": "app.test.com",
+          "uri": "http://app.test.com/v1/test"
+        }
+      additionalProperties: false
+    EdgeCloudZoneId:
+      description: |
+        Operator-issued UUID for the Edge Cloud Zone.
+      type: string
+      format: uuid
+      additionalProperties: false
+    EdgeCloudZoneName:
+      description: |
+        Edge Cloud Zone Name - the common name for the Edge Cloud Zone.
+      type: string
+      additionalProperties: false
+    EdgeCloudProvider:
+      description: |
+        The company name of the Edge Cloud Zone provider.
+      type: string
+    EdgeCloudRegionName:
+      description: |
+        region of the Edge Cloud Zone.
+      type: string
+    ApplicationEndpointsId:
+      description: |
+        A system-defined string identifier representing
+        one or more registered Application Endpoints.
+      type: string
+      format: uuid
+      readOnly: true
+      additionalProperties: false
+    ApplicationProfileId:
+      description: |
+        Unique identifier for a Application Profile
+      type: string
+      readOnly: false
+      additionalProperties: false
+    ErrorInfo:
+      description: Common schema for errors
+      type: object
+      required:
+        - status
+        - code
+        - message
+      properties:
+        status:
+          type: integer
+          description: HTTP status code returned along with this error response
+        code:
+          type: string
+          description: Code given to this error
+        message:
+          type: string
+          description: Detailed error description
+  responses:
+    Generic400:
+      description: Bad Request
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_400_INVALID_ARGUMENT:
+              description: Invalid Argument. Generic Syntax Exception
+              value:
+                status: 400
+                code: INVALID_ARGUMENT
+                message: Client specified an invalid argument, request body or
+                  query param.
+    Generic401:
+      description: Unauthorized
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_401_UNAUTHENTICATED:
+              description: Request cannot be authenticated
+              value:
+                status: 401
+                code: UNAUTHENTICATED
+                message: Request not authenticated due to missing, invalid, or
+                  expired credentials.
+    Generic403:
+      description: Forbidden
+      headers:
+        x-correlator:
+          $ref: '#/components/headers/x-correlator'
+      content:
+        application/json:
+          schema:
+            $ref: '#/components/schemas/ErrorInfo'
+          examples:
+            GENERIC_403_PERMISSION_DENIED:
+              description: |
+               Permission denied. OAuth2 token access does not have the required
+               scope or when the user fails operational security
+              value:
+                status: 403
+                code: PERMISSION_DENIED
+                message: Client does not have sufficient permissions to perform
+                  this action.
+            GENERIC_403_INVALID_TOKEN_CONTEXT:
+              description: |
+                Reflect some inconsistency between information in some field
+                of the API and the related OAuth2 Token
+              value:
+                status: 403
+                code: INVALID_TOKEN_CONTEXT
+                message: applicationProfileId is not consistent with
+                  access token
+    Generic404:
+      description: Not found
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_404_NOT_FOUND:
+              description: Resource is not found
+              value:
+                status: 404
+                code: NOT_FOUND
+                message: The specified resource is not found.
+    Generic422:
+      description: Unprocessable Content
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_422_NOT_SUPPORTED:
+              description: Not Supported
+              value:
+                status: 422
+                code: NOT_SUPPORTED
+                message: Service not supported for this applicationProfileId
+            UNIDENTIFIABLE_APPLICATION_PROFILE:
+              description: |
+                The Application Profile is not included in the request
+                and the profile information cannot be derived
+                from the 3-legged access token
+              value:
+                status: 422
+                code: UNIDENTIFIABLE_APPLICATION_PROFILE
+                message: The Application Profile cannot be identified
+    Generic500:
+      description: Internal Server Error
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_500_INTERNAL:
+              description: Problem in Server side. Regular Server Exception
+              value:
+                status: 500
+                code: INTERNAL
+                message: Unknown server error. Typically a server bug.
+    Generic503:
+      description: Service Unavailable
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_503_UNAVAILABLE:
+              description: Service is not available.
+                Temporary situation usually related to maintenance process in
+                the server side
+              value:
+                status: 503
+                code: UNAVAILABLE
+                message: Service Unavailable.
+    Generic504:
+      description: Gateway Timeout
+      headers:
+        x-correlator:
+          $ref: "#/components/headers/x-correlator"
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/ErrorInfo"
+          examples:
+            GENERIC_504_TIMEOUT:
+              description: API Server Timeout
+              value:
+                status: 504
+                code: TIMEOUT
+                message: Request timeout exceeded.