API Blueprint

API Blueprint is a Markdown-based specification language for describing web APIs, originally created by Apiary (acquired by Oracle). The spec is MIT licensed but development effectively stalled after Oracle's acquisition of Apiary; it is documented here for completeness as historical context for the API specification landscape.

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.
All 92 tools

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/api-blueprint"
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 email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
aid: specifications:api-blueprint
name: API Blueprint
description: API Blueprint is a Markdown-based specification language for describing web APIs, originally
  created by Apiary (acquired by Oracle). The spec is MIT licensed but development effectively stalled
  after Oracle's acquisition of Apiary; it is documented here for completeness as historical context for
  the API specification landscape.
humanURL: https://apiblueprint.org/
baseURL: https://github.com/apiaryio/api-blueprint
tags:
- API Blueprint
- Markdown
- Legacy
- Historical
- Specification Language
properties:
- type: Documentation
  url: https://apiblueprint.org/documentation/tutorial.html
- type: Specification
  url: https://github.com/apiaryio/api-blueprint/blob/master/API%20Blueprint%20Specification.md
  title: API Blueprint Specification
- type: GitHubOrganization
  url: https://github.com/apiaryio
- type: GitHubRepository
  url: https://github.com/apiaryio/api-blueprint
- type: License
  url: https://opensource.org/license/mit
  title: MIT
- type: Examples
  url: https://raw.githubusercontent.com/api-evangelist/specifications/refs/heads/main/examples/api-blueprint-example.json
  title: API Blueprint Specification Record Example