Fumadocs OpenAPI Proxy API

The Fumadocs OpenAPI Proxy API is a server-side HTTP proxy included in the fumadocs-openapi package that enables the interactive API playground to make authenticated requests to external API servers from the browser without CORS restrictions. Documentation sites mount the proxy at a route such as /api/proxy, where it accepts any HTTP method, extracts the target URL from the url query parameter, and transparently forwards the request to the upstream server.