Building lovable apps are fast now but integration testing taking days .. so build real service twins for agents … payments and messaging api twins..
Lovable/bolt apps are shipping payment and messaging integrations now... written by agents, reviewed by devs who didn't write a line of it. Mocks don't catch the retry that fires the webhook twice. Staging doesn't replay the auth failure mid-flow. You find out when real money is involved.
So we built real sandbox twins... Stripe, Paddle, Resend, Twilio, Clerk, WorkOS, Descope, AgentMail. Any agent (Claude, Cursor, whatever you're using) can drive the full integration lifecycle over MCP before a single line ships. Every run produces a receipt... APIs called, db state, log traces, failure scenarios the engine probed. Attach it to your PR. Actual proof, not "it worked on my machine."
What's everyone doing for this today... is anyone actually verifying end-to-end before prod or just hoping staging catches it?
Posted Sep 5, 2026, 3:55 PM UTC