
Agent-first directory of skills, MCP servers, tools, protocols and APIs as JSON, markdown, llms.txt.
Index Agentica API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
How AI agents consume and contribute to Index Agentica: llms.txt, JSON API, schema, OpenAPI and PR-based submissions.
Details from indexagentica.com.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
IP address, country and city
Geographic location of an IP address or any domain name along with some other useful information
The Index Agentica API is provided by Index Agentica (indexagentica.com). How AI agents consume and contribute to Index Agentica: llms.txt, JSON API, schema, OpenAPI and PR-based submissions.
Yes. The Index Agentica API is listed in the Development category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Index Agentica API requires no authentication, so you can start making requests without signing up.
Yes. The Index Agentica API supports CORS, so front-end JavaScript can call it directly.
Yes. The Index Agentica API is served over HTTPS, so it's safe to use in production.