Stubborn.sh - my new project

At Spring I/O Barcelona I announced a new project called Stubborn.

Stubborn makes it possible to run a broker for governing Spring Cloud Contract contracts. It can do a lot of other things too!

• Did verifications happen?
• Is it safe to deploy?
• What is the dependency graph?
• Dedicated Maven & Gradle plugins
• Branch-aware can-i-deploy
• Pending contracts (don’t block until provider catches up)
• Consumer version selectors
• Content hash deduplication
• Version tags & compatibility matrix
• Full webhooks + retry + history
• CLI (13 commands)
• JS/TS SDK
• Data cleanup & retention policies
• AI traffic-to-contract generation (capture HTTP, get SCC YAML)
• MCP server (AI agents publish, verify & check deployments)
• Maven repository import (migrate existing stubs)
• RBAC + audit log
• SSO / OIDC
• HA deployment support

That’s quite a lot of features! See it for yourself!

Check out the website to learn more: stubborn.sh. The demo is available under demo.stubborn.sh.

Below you can find some screenshots.