Anthropic is killing stainless, so we built our own SDK/MCP generator
Anthropic killing stainlessAPI is pretty sad if i say so.
So we took matters into our own hands.
Introducing Ironic, cause its ironic... get it? anyways
Generate SDKs and MCPs using your OpenAPI spec.
If you're looking to migrate from Stainless, Ironic is fully compatible with stainless.yml, just rename your existing stainless.yml to ironic.yml and you're good to go.
It’s blazingly fast too. Generating SDKs and MCPs takes milliseconds, and you can inspect resources before fully committing to generation.
Right now the testing side is mostly snapshot tests on generated output plus a tiny runtime suite, which honestly is the easy half. The harder part is making sure SDKs stay correct even when APIs drift away from their specs, so the next step is proper contract testing with spec-vs-server diffs and lightweight smoke tests generated alongside each SDK.
Ironic is literally only a few days old right now, so most of the focus so far has been matching Stainless output 1:1 so migration is basically frictionless.
Ironic is completely open-source.
try it out:
https://github.com/crosmos-labs/ironic