api-commons

The API Commons — the hub and website (apicommons.org) for open, machine-readable API building blocks, standards, and browser-first tools.

The Spectral ruleset format as a standalone specification and JSON Schema — normative, independently versioned, implementable by anyone.

Spectral CLI — a maintained, openly-governed API Commons build of the Spectral linter. Reference implementation of the Spectral ruleset specification.

Standalone documentation for any APIs.json — rich, portable HTML docs for every API, property, and inline OpenAPI/Arazzo artifact. Supports APIs.json 0.11–0.21.

JSON:API artifacts for the API Commons — schemas and governance for the JSON:API standard.

Turn a prose style guide into an owned, grounded, well-named Spectral ruleset. studio.apicommons.org.

The change log schema for the API Commons — a machine-readable way to publish an API's changelog.

This is the repository for managing the APIs.json for the Train Travel API template.

A grounded Spectral ruleset for the OWASP API Security Top 10 — add a real security governance layer in one line.

Machine-readable API vocabulary building blocks for the API Commons — shared words and definitions for API operations.

A Model Context Protocol (MCP) server that lints API artifacts against a best-of-breed API governance ruleset from any AI client. Powered by Spectral.

The plans schema for the API Commons — machine-readable API access plans, tiers, and pricing.

Machine-readable API policy building blocks for the API Commons — the business rules behind API governance.

The rate limits schema for the API Commons — a machine-readable way to publish the quotas an API enforces.

Browser-first API governance validator for OpenAPI, AsyncAPI, Arazzo, and JSON Schema — powered by Spectral, with Swagger 2.0 parity. Search Git hosts for real artifacts, lint against a best-of-breed ruleset, edit rules, and commit or PR back. No backend. validator.apicommons.org

Shared examples for the API Commons building blocks and the APIs.json ecosystem.

The universal install button for MCP servers — one button, every client. Hosted chooser, embeddable web component, and an open registry of MCP client install methods.

Website for Spotlight Rules — the openly-governed build of the Spectral API linter.

De facto standards for the model layer — the OpenAI interface profiled as adopters actually implement it, graded into core/extended/vendor tiers by measured adoption, with a registry of who implements what.

Machine-readable API governance rules for the API Commons — Spectral rulesets across many artifact types.