Open Source Building Blocks for API Operations

API Commons provides machine-readable properties that cover every dimension of API operations — from licensing and authentication to SDKs, road maps, and governance rules. Part of the APIs.io network.

Common Schema Common Schema Shared operational properties Community Schema Community Schema Community-contributed properties Onboarding Onboarding Agentic API onboarding Tools Tools Browser-first API tooling
If we are going to take things to the next level with APIs and AI, there are aspects of API operations we need to stop competing upon and start sharing. API Commons works in concert with APIs.json to turn human-readable API properties into machine-readable building blocks that can be used to standardize and automate your API ecosystem at scale.

Tools

Browser-first, backend-free tools for working with the APIs you produce and consume. Everything runs locally in your browser — your tokens and data never leave it.

API Discovery

discovery.apicommons.org

A browser-first registry for API artifacts. Search APIs.io and code across GitHub, GitLab, and Bitbucket, save what you find with provenance, and roll it all into a single APIs.json 0.21 index.

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API Documentation

documentation.apicommons.org

Standalone documentation for any APIs.json — OpenAPI rendered as a full reference and Arazzo workflows as step-by-step timelines. Zip it up next to an apis.json or bundle it into one portable HTML file.

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MCP Install

install.apicommons.org

The universal install button for MCP servers — one button, every client. Deep links, CLI commands, config snippets, and connector steps for 26 MCP clients, driven by an open registry of client install methods.

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API Reusability

reusability.apicommons.org

Assess how reusable the APIs across your organization really are. Discover evidence of APIs, index them as an APIs.json inventory, then score reusability and duplication by org, team, or domain.

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