> For the complete documentation index, see [llms.txt](https://tailwindsdocs.innovativesol.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tailwindsdocs.innovativesol.com/readme/chatflows/langchain/chains/openapi-chain.md).

# OpenAPI Chain

Chain that automatically select and call APIs based only on an OpenAPI spec.

<figure><img src="https://662370747-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3VoWwSsyrEg0DEvIIjv9%2Fuploads%2Fgit-blob-6e9904030f3124e764353ee2ac2320d1a4ac2bb2%2Fimage%20(25).png?alt=media" alt="" width="335"><figcaption><p>OpenAPI Chain Node</p></figcaption></figure>