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OpenAPI Specification

openapi: 3.2.0
info:
  title: Kleinanzeigen Agent Sellers API
  version: 2.0.0
  description: Authenticated read API for live, normalized public Kleinanzeigen data plus an archive of listings recorded since October 2026. Requests consume the documented Kleinanzeigen Agent credits.
  contact:
    email: office@kleinanzeigen-agent.de
servers:
- url: https://api.kleinanzeigen-agent.de/api/v2/kleinanzeigen
  description: Production API v2
tags:
- name: Sellers
paths:
  /sellers/{seller_id}/profile:
    get:
      operationId: getKleinanzeigenSellerProfile
      summary: Get a public seller profile
      parameters:
      - name: seller_id
        in: path
        required: true
        description: Kleinanzeigen seller ID.
        schema:
          type: string
      security:
      - KlazApiKey: []
      - BearerApiKey: []
      responses:
        '200':
          description: Successful normalized Kleinanzeigen response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SuccessResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/InsufficientCredits'
        '429':
          $ref: '#/components/responses/RateLimited'
        '502':
          $ref: '#/components/responses/UpstreamUnavailable'
      tags:
      - Sellers
  /sellers/{seller_id}/ads:
    get:
      operationId: getKleinanzeigenSellerAds
      summary: List a seller's live ads
      parameters:
      - name: seller_id
        in: path
        required: true
        description: Kleinanzeigen seller ID.
        schema:
          type: string
      - name: page
        in: query
        description: Zero-based result page.
        schema:
          type: integer
          minimum: 0
          maximum: 1000
          default: 0
      - name: size
        in: query
        description: Results per page.
        schema:
          type: integer
          minimum: 1
          maximum: 100
          default: 31
      security:
      - KlazApiKey: []
      - BearerApiKey: []
      responses:
        '200':
          description: Successful normalized Kleinanzeigen response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SuccessResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '402':
          $ref: '#/components/responses/InsufficientCredits'
        '429':
          $ref: '#/components/responses/RateLimited'
        '502':
          $ref: '#/components/responses/UpstreamUnavailable'
      tags:
      - Sellers
components:
  schemas:
    SuccessResponse:
      type: object
      required:
      - success
      - data
      - request_id
      properties:
        success:
          const: true
        message:
          type: string
        data:
          type: object
          additionalProperties: true
        request_id:
          type: string
    ErrorResponse:
      type: object
      required:
      - success
      - error_code
      - message
      - request_id
      properties:
        success:
          const: false
        error_code:
          type: string
        message:
          type: string
        errors:
          type: object
          additionalProperties: true
        data:
          type: object
          additionalProperties: true
        request_id:
          type: string
  responses:
    UpstreamUnavailable:
      description: Kleinanzeigen is temporarily unavailable.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Invalid request parameters.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    InsufficientCredits:
      description: The account has insufficient credits.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    RateLimited:
      description: A plan or upstream rate limit was reached.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    KlazApiKey:
      type: apiKey
      in: header
      name: klaz_key
      description: Kleinanzeigen Agent API key.
    BearerApiKey:
      type: http
      scheme: bearer
      description: API key sent as a Bearer token.
externalDocs:
  description: Complete developer documentation as Markdown
  url: https://kleinanzeigen-agent.de/api/docs-raw