openapi: 3.2.0
info:
  title: 3gpp-ims-sm IMS Sessions (Collection) API
  version: 1.0.0
  description: "API for the IMS Session Management Service.\n© 2025, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).  \nAll rights reserved.\n"
servers:
- url: '{apiRoot}/3gpp-ims-sm/v1'
  variables:
    apiRoot:
      default: https://example.com
      description: apiRoot as defined in clause 5.2.4 of 3GPP TS 29.122.
security:
- {}
- oAuth2ClientCredentials: []
tags:
- name: IMS Sessions (Collection)
paths:
  /ims-sessions:
    get:
      summary: Request to retrieve all the active IMS Sessions managed by the NEF.
      operationId: GetImsSessions
      tags:
      - IMS Sessions (Collection)
      responses:
        '200':
          description: 'OK. All the "Individual IMS Session" resource(s) managed by the NEF are returned. If there are no active "Individual IMS Session" resources at the NEF, an empty array is returned.

            '
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/ImsSession'
                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:
    ImsSession:
      description: Represents the IMS Session Information.
      type: object
      properties:
        afId:
          type: string
        imsSessionInfo:
          $ref: TS29175_Nimsas_ImsSessionManagement.yaml#/components/schemas/ImsSessionInfo
        suppFeat:
          $ref: TS29571_CommonData.yaml#/components/schemas/SupportedFeatures
      required:
      - afId
      - imsSessionInfo
  securitySchemes:
    oAuth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: '{tokenUrl}'
          scopes: {}
externalDocs:
  description: '3GPP TS 29.522 V19.5.0; 5G System; Network Exposure Function Northbound APIs.

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