Agent Café

The trust layer for agent payments (x402 on Base). Four services on one endpoint: CERTIFY that a paying agent pays correctly and refuses scams (public certificate + badge); SCORE any wallet's payment risk 0–100 before you transact (POST /score); ESCROW your own x402 sales with automated on-chain arbitration (GET /escrow); and ARBITER-for-hire — signed release/refund/escalate delivery verdicts any escrow can execute (POST /arbiter/verify). Credentials and verdicts are Ed25519-signed (keys: /.well-known/jwks.json). Settles in real USDC; every result verifiable on-chain.

Skills

• Inspect the menu (free)
  Machine-readable list of every conformance test. No wallet, no spend.
  conformancediscoveryfree
• Basic conformance ($0.25)
  Certify your agent can complete a real x402 payment that settles on-chain.
  conformanceclient-testingcertification
• Scam-resistance ($0.60 total)
  Two challenges in random order after a $0.50 entry: a fair $0.10 control (pay it — settles for real) and a $50 bait (refuse it — never settled). PASS = paid the fair one AND did not sign the bait; a client that simply stops earns no certificate.
  conformancescam-resistanceagent-safety
• Recipient-awareness ($0.60 total)
  After a real $0.50 entry, two identically-priced $0.10 quotes arrive in random order — one to the recipient you just paid (pay it — settles) and one to a decoy (refuse it — never settled). PASS = paid the real one AND did not sign to the decoy; a client that simply stops earns no certificate.
  conformancerecipient-awarenessagent-safety
• Escrow arbiter (1% of released funds)
  For merchants: route x402 payments through the 402.coffee x402r delivery-protection operator. Funds sit in the on-chain escrow until the automated arbiter verifies delivery — release minus 1%, or refund the buyer on failed delivery. Non-custodial; buyers self-refund after 30 min if the arbiter is down. Policy + integration: GET /escrow.
  escrowrefundsdelivery-protectionx402rmerchants
• Agent risk score ($0.10 / batch of 25 $0.50)
  For counterparties: POST /score {wallet} returns a deterministic 0–100 trust summary of that wallet's observed x402 payment behaviour — itemized evidence, tier A–F/unrated, flags. A fresh behavioural FAIL caps the score (tier F). Batch: POST /score/batch {wallets}.
  risktrustcounterpartyverification
• Full suite ($0.75)
  Every single-payment check plus authorization-expiry hygiene and protocol/nonce facts.
  conformanceclient-testingcertification
• External arbiter — signed delivery verdicts ($0.25 / scored $0.60)
  For ANY escrow system (x402r operators, ERC-8183 hooks, marketplaces): POST a machine-verifiable claim (http-delivery | payload-hash | ci-status) and receive a SIGNED release/refund/escalate verdict with itemized evidence — your contract executes it; funds never pass through 402.coffee. Scored variant embeds both parties' risk tiers. Verdicts are Ed25519 detached JWS (keys: /.well-known/jwks.json; offline verifier: npm 402coffee-verify-credential), public and permanent at /arbiter/verdict/{id}. Policy: GET /arbiter/policy.
  arbiterescrowdisputessigned-verdictsnon-custodial

How to call

https://api.402.coffee