Add an API

Add your API to the APIs.io index in seconds. Paste your API or company URL — homepage, docs, or an APIs.json file — and we’ll read your public well-knowns (APIs.json, API Onboarding descriptor, OpenAPI, llms.txt, MCP server), score how ready it is, and let you confirm the details before submitting. No URL handy? Just give us the name and apis.io will research your public API and agent-native surfaces and build the listing for you. Prefer the old way? A pre-filled GitHub issue is still one click away.

Paste a domain and we’ll look for your APIs.json, API Onboarding descriptor, OpenAPI, llms.txt, and MCP endpoint — no form-filling required.
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No URL handy? Give us the name and apis.io will research it and build the listing for you.
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Readiness checks
    Prefer a GitHub issue?