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OpenAPI Specification

openapi: 3.2.0
info:
  title: OpenMercantil Public Contracts API
  version: 1.4.0
  description: 'Public JSON API for Spanish company information derived from BORME and other

    public sources. OpenMercantil is independent and informational; it is not

    the BOE, BORME or Registro Mercantil and does not replace official

    certificates or registry extracts. The API is free and public, requires no

    API key, and is rate-limited per IP. Versions v1.0 through v1.4 are

    available and documented at https://openmercantil.es/api/documentacion.

    '
  termsOfService: https://openmercantil.es/terminos-de-uso
  contact:
    name: OpenMercantil
    url: https://openmercantil.es/soporte
    email: social@openmercantil.es
  license:
    name: CC BY 4.0 For Derived Public-Data Outputs
    url: https://creativecommons.org/licenses/by/4.0/
servers:
- url: https://openmercantil.es
  description: Production
tags:
- name: Contracts
  description: Public procurement (PLACSP) rankings
paths:
  /api/v1/persona/{slug}/contracts:
    get:
      tags:
      - Contracts
      summary: List Public Contracts For Person
      operationId: getPersonContracts
      description: List public procurement (PLACSP) contracts associated with the person (v1.4).
      parameters:
      - name: slug
        in: path
        required: true
        schema:
          type: string
          example: amancio-ortega-gaona
      responses:
        '200':
          description: Contracts list
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /api/v1/contracts/top-companies:
    get:
      tags:
      - Contracts
      summary: Top Companies By Public Contracts
      operationId: getTopCompaniesByContracts
      description: Ranking of companies by public-procurement contract volume, optionally filtered by province and CNAE (v1.4).
      parameters:
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 500
          default: 50
      - name: province
        in: query
        required: false
        schema:
          type: string
          example: madrid
      - name: cnae
        in: query
        required: false
        schema:
          type: string
          example: F
      responses:
        '200':
          description: Top companies ranking
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /api/v1/contracts/top-companies.csv:
    get:
      tags:
      - Contracts
      summary: Top Companies By Public Contracts As CSV
      operationId: getTopCompaniesByContractsCsv
      description: CSV download of the top-companies-by-contracts ranking (v1.4).
      parameters:
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 1000
          default: 100
      responses:
        '200':
          description: CSV download
          content:
            text/csv:
              schema:
                type: string
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /api/v1/contracts/top-persons:
    get:
      tags:
      - Contracts
      summary: Top Persons By Public Contracts
      operationId: getTopPersonsByContracts
      description: Ranking of persons by public-procurement contract volume (v1.4).
      parameters:
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 500
          default: 30
      responses:
        '200':
          description: Top persons ranking
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /api/v1/contracts/top-persons.csv:
    get:
      tags:
      - Contracts
      summary: Top Persons By Public Contracts As CSV
      operationId: getTopPersonsByContractsCsv
      description: CSV download of the top-persons-by-contracts ranking (v1.4).
      parameters:
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          minimum: 1
          maximum: 1000
          default: 100
      responses:
        '200':
          description: CSV download
          content:
            text/csv:
              schema:
                type: string
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
      additionalProperties: true
  responses:
    TooManyRequests:
      description: Rate limit exceeded
      headers:
        Retry-After:
          description: Seconds to wait before retrying.
          schema:
            type: integer
        X-RateLimit-Limit:
          description: Maximum requests per window (60 per minute by IP on the public anonymous tier).
          schema:
            type: integer
        X-RateLimit-Remaining:
          description: Remaining requests in the current window.
          schema:
            type: integer
        X-RateLimit-Reset:
          description: Unix timestamp when the rate-limit counter resets.
          schema:
            type: integer
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    sessionCookie:
      type: apiKey
      in: cookie
      name: session
      description: Session cookie issued after web sign-in, required only for billing endpoints.