Barbacane is an open-source API gateway that uses your OpenAPI and AsyncAPI specs as the single source of truth. No proprietary DSL, no config drift. Write your spec, compile it, deploy it- routing, validation, auth, and rate limiting just work. Built in Rust for sub-microsecond performance, extensible with WebAssembly plugins.

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Startups get 90% off Intercom + 1 year of Fin AI Agent free

If you have specific plugin needs, ask about them here, I'll be happy to develop them in top priority!

try it, you'll see :)

I've spent years working with APIs in fintech, and one frustration kept coming back — the gap between API specs and gateway configurations. You write a beautiful OpenAPI spec, then you rewrite half of it in your gateway's proprietary config format. They drift apart. Bugs happen. Security holes open up.

So I built Barbacane: your spec is literally your gateway config.

You annotate your OpenAPI or AsyncAPI spec with x-barbacane-* extensions, compile it into an optimized binary artifact, and deploy. Routing, validation, authentication — everything is derived from a single source of truth.

A few things I'm proud of:

Built in Rust — ~83ns route lookups, ~1.2µs full request validation
WASM plugins — extend it in any language, fully sandboxed
Control plane + data planes — data planes keep running even if the control plane goes down
Truly open source — Apache 2.0, no enterprise paywall

This is v0.1.0 — the foundation is solid, and there's a lot on the roadmap. I'd love your feedback, feature requests, and honest opinions.

🔗 Website: https://barbacane.dev 📖 Docs: https://docs.barbacane.dev ⭐ GitHub: https://github.com/barbacane-dev/barbacane

Happy to answer any questions!