ZV-2026-0250 · 2026-08-21 · engine-production-3bdc.up.railway.app
engine-production-3bdc.up.railway.app: New required field idempotency_key on create_checkout; requests without it will fail.
breaking
What changed
New required field idempotency_key on create_checkout; requests without it will fail.
What to do
If your agents call engine-production-3bdc.up.railway.app, pin the new snapshot, patch the affected call sites, and let a green contract check confirm the fix. If you don't use the changed tools, nothing is required, but the rest of the ecosystem just learned about it at the same moment you did.
The redline
− idempotency_key New required field idempotency_key on create_checkout; requests without it will fail. − Get a hosted-checkout link outside beta. Disabled while beta pricing is free. Whe… + Get a hosted-checkout link outside beta. Disabled while beta pricing is free. The… create_checkout