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OpenAPI Specification

openapi: 3.2.0
info:
  title: 3gpp-vfl-inference VFL Inference Subscriptions (Collection) API
  version: 1.0.1
  description: "API for VFL Inference.  \n© 2026, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).  \nAll rights reserved.\n"
servers:
- url: '{apiRoot}/3gpp-vfl-inference/v1'
  variables:
    apiRoot:
      default: https://example.com
      description: apiRoot as defined in clause 4.4 of 3GPP TS 29.501
security:
- {}
- oAuth2ClientCredentials:
  - 3gpp-vfl-inference
tags:
- name: VFL Inference Subscriptions (Collection)
paths:
  /{afId}/subscriptions:
    parameters:
    - name: afId
      in: path
      description: Represents the identifier of the AF.
      required: true
      schema:
        type: string
    get:
      summary: Retrieve all the active VFL Inference Subscriptions for the given AF.
      operationId: GetVFLInferenceSubscriptions
      tags:
      - VFL Inference Subscriptions (Collection)
      responses:
        '200':
          description: 'OK. All the Individual VFL Inference Subscription resource(s) managed by the NEF for the requested AF are returned. If there are no active Individual VFL Inference Subscription resources at the NEF for the requested AF, an empty array is returned.

            '
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/VflInferSub'
                minItems: 0
        '307':
          $ref: TS29122_CommonData.yaml#/components/responses/307
        '308':
          $ref: TS29122_CommonData.yaml#/components/responses/308
        '400':
          $ref: TS29122_CommonData.yaml#/components/responses/400
        '401':
          $ref: TS29122_CommonData.yaml#/components/responses/401
        '403':
          $ref: TS29122_CommonData.yaml#/components/responses/403
        '404':
          $ref: TS29122_CommonData.yaml#/components/responses/404
        '406':
          $ref: TS29122_CommonData.yaml#/components/responses/406
        '429':
          $ref: TS29122_CommonData.yaml#/components/responses/429
        '500':
          $ref: TS29122_CommonData.yaml#/components/responses/500
        '503':
          $ref: TS29122_CommonData.yaml#/components/responses/503
        default:
          $ref: TS29122_CommonData.yaml#/components/responses/default
components:
  schemas:
    VflInferSub:
      description: Represents a VFL Inference subscription.
      type: object
      properties:
        notifCorrId:
          type: string
          description: 'String identifying the Notification Correlation ID in the corresponding notification.

            '
        notifUri:
          $ref: TS29571_CommonData.yaml#/components/schemas/Uri
        extNwdafId:
          type: string
          description: 'Contains the external identifier of the target NWDAF acting as VFL client.

            '
        reportingReqs:
          $ref: TS29523_Npcf_EventExposure.yaml#/components/schemas/ReportingInformation
        suppFeats:
          $ref: TS29571_CommonData.yaml#/components/schemas/SupportedFeatures
        vflInferAnaSubs:
          type: array
          items:
            $ref: TS29520_Nnwdaf_VFLInference.yaml#/components/schemas/VflInferAnaSub
          minItems: 1
          description: Represents inference subscription per analytics Id.
        vflInferResults:
          type: array
          items:
            $ref: TS29520_Nnwdaf_VFLInference.yaml#/components/schemas/VflInferResult
          minItems: 1
          description: Represents intermediate VFL Inference result.
      required:
      - notifUri
      - notifCorrId
      - vflInferAnaSubs
  securitySchemes:
    oAuth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: '{nrfApiRoot}/oauth2/token'
          scopes:
            3gpp-vfl-inference: Access to the VFLInference API
externalDocs:
  description: '3GPP TS 29.522 V19.6.0; 5G System; Network Exposure Function Northbound APIs.

    '
  url: https://www.3gpp.org/ftp/Specs/archive/29_series/29.522/