# OpenAPI Specification

> Language-agnostic standard for describing HTTP APIs, widely used to generate agent tools from API definitions.

- id: `openapi`
- category: Protocols (`protocols`)
- url: https://www.openapis.org
- repo: https://github.com/OAI/OpenAPI-Specification
- docs: https://spec.openapis.org/oas/latest.html
- status: active
- pricing: open-source
- license: Apache-2.0
- tags: api-description, http, open-standard, tooling
- sources: https://spec.openapis.org/oas/latest.html , https://github.com/OAI/OpenAPI-Specification
- added: 2026-10-02
- updated: 2026-10-02
- last verified: 2026-10-02
- featured in: Index Agentica lookup (https://indexagentica.com/skills/indexagentica-lookup/)
- maintainer: OpenAPI Initiative
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/openapi/
- json: https://indexagentica.com/api/entries/openapi.json

The latest published version at spec.openapis.org is 3.2.1. Maintained by the OpenAPI Initiative.