OpenMercantil Contracts API
Public procurement (PLACSP) rankings
Operations 5
Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay
Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/openmercantil:openmercantil-contracts-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
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.