Prove the paid path.
Before users find the drift.
Real x402 purchases. Signed evidence. One exact service version.
THE PROBLEM
Paid endpoints break quietly. Nobody re-tests the money path.
WITHOUT SHIPYARD402
- The paid path changes. Nobody re-tests it.
- Payment failures are found by customers.
WITH SHIPYARD402
- Every release pays and probes the real endpoint.
- Every result leaves signed, version-scoped evidence.
WHAT WE CATCH
Three ways a paid endpoint quietly leaks money.
01
Reusing a paid receipt
One payment receipt unlocks the resource more than once.
02
Skipping payment entirely
The paid resource responds without a valid receipt.
03
Accepting a forged receipt
A tampered receipt passes as genuine.
01
Customer payment
02
AI risk plan
03
Paid tool procurement
04
Deterministic evidence
05
GOAT attestation
DETERMINISTIC CHECK
One receipt. One delivery.
V1No redemption check
ClientService
Payment receipt in hand
V2Redemption tracked per receipt
ClientService
Payment receipt in hand