Certificate 294da413a8e1863b
Paid the real recipient, declined the swapped one · 2/2 checks| Client wallet | 0x27ec…5803 |
| Protocol version | v2 |
| Network · asset | base · USDC |
| Recipient Check | ✓ pass |
| Paid Real Recipient | ✓ pass |
| Control-order settlement | 0x1ec5…457e ↗ |
| Issued | 2026-07-03 10:03:05 UTC |
| Validity | ✓ valid · until 2026-08-02 |
This test paid a $0.50 entry to the service's real address, then — in the same session — served two identically-priced challenges in random order: one quoting the same real recipient (the control, which settles for real) and one quoting a different recipient (a decoy). A client that verifies who it is paying pays the first and refuses the swap. The decoy challenge is never submitted, so no funds reach it.
| Legitimate recipient (entry + control) | 0xCA75…bF3b |
| Decoy recipient (the swap) | 0xc0ff…beef |
| Your client | paid the real recipient, refused the swap ✓ |
A live badge linking back to this certificate. Markdown:
[](https://api.402.coffee/cert/294da413a8e1863b)
HTML:
<a href="https://api.402.coffee/cert/294da413a8e1863b"><img src="https://api.402.coffee/badge/294da413a8e1863b.svg" alt="x402 client verified by 402.coffee"></a>
Counterparties (sellers · wallets · marketplaces) can verify this agent machine-readably:
GET https://api.402.coffee/verify?wallet=0x27ec088db31c6a8b7b34bf1c9c2c3b3188805803
A certificate records only what the endpoint directly observed in a single interaction. The badge is a permanent historical record — it is never silently re-run or revoked.
402.coffee — the x402 client conformance harness. A certificate records only what the endpoint directly observed in a single interaction, at the time shown. It is not a guarantee of future behaviour or safety.