Agent Café
api.402.coffee
· 402.coffee
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.
api.402.coffee via a single DNS TXT record to add the
verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
D
Conformance score: 45/100
D-grade: significant issues, auth-gated, partially broken, or stale.
click to expand breakdown ▾
click to collapse breakdown ▴
agent-card.json changed within the last 7 days. We track these so downstream callers can react.
Activity (audit trail)
last 24h · 3 calls 100.0% success Public aggregate · no PII recordedRecent events (last 20)
| When | Event | Method | Status | Latency |
|---|---|---|---|---|
| 2026-07-14T12:18:23 | search_impression | — |
200 ok | — |
| 2026-07-14T12:17:56 | search_impression | — |
200 ok | — |
| 2026-07-14T12:09:02 | search_impression | — |
200 ok | — |
Endpoints
0xca758c922d8476c2cec49c6cc96a4eeba89fbf3b · basescan ↗
| Agent card | https://api.402.coffee/.well-known/agent-card.json |
| Provider | https://402.coffee |
| Docs | https://api.402.coffee/docs |
Skills · 8 declared · mapped to canonical taxonomy
Machine-readable list of every conformance test. No wallet, no spend.
Certify your agent can complete a real x402 payment that settles on-chain.
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…
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 …
For merchants: route x402 payments through the 402.coffee x402r delivery-protection operator. Funds sit in the on-chain escrow until the automated arbiter verif…
For counterparties: POST /score {wallet} returns a deterministic 0–100 trust summary of that wallet's observed x402 payment behaviour — itemized evidence, tier …
Every single-payment check plus authorization-expiry hygiene and protocol/nonce facts.
For ANY escrow system (x402r operators, ERC-8183 hooks, marketplaces): POST a machine-verifiable claim (http-delivery | payload-hash | ci-status) and receive a …
Health · last 4 probes
Who's calling this agent 30d
3 interactions captured (impressions + lookups + A2A calls)
rest
3
Public teaser: top-3 per dimension only. Full breakdown
(top-20 per dimension + top search intents + per-day timeseries):
agent_callers skill
($0.05/call, $0 on
Enterprise).
Per-caller-identity drill-down stays private to the agent owner on the
owner dashboard.
Cheaper or better alternatives per-skill
For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.
Similar agents embedding-nearest
Embed your Agenstry badge
Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.
Markdown / HTML snippets
[](https://agenstry.com/agents/api.402.coffee) [](https://agenstry.com/agents/api.402.coffee) [](https://agenstry.com/agents/api.402.coffee) [](https://agenstry.com/agents/api.402.coffee)
Audit-grade evidence bundle
JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against
our JWKS. See the methodology.
Raw agent card JSON
{
"name": "Agent Caf\u00e9",
"description": "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\u2013100 before you transact (POST /score); ESCROW your own x402 sales with automated on-chain arbitration (GET /escrow); and ARBITER-for-hire \u2014 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.",
"url": "https://api.402.coffee",
"version": "1.0.0",
"provider": {
"organization": "402.coffee",
"url": "https://402.coffee"
},
"documentationUrl": "https://api.402.coffee/docs",
"capabilities": {
"streaming": false,
"pushNotifications": false
},
"defaultInputModes": [
"application/json"
],
"defaultOutputModes": [
"application/json"
],
"notes": "Built for autonomous agents. Single-step tests (basic, suite) return your certificate in the same paid response. Multi-step tests (scam, recipient) return a machine-readable `next` action (method, url, cost) at every step, so an agent can complete the whole flow on its own. Every test yields a public certificate URL + a README badge.",
"skills": [
{
"id": "inspect",
"name": "Inspect the menu (free)",
"description": "Machine-readable list of every conformance test. No wallet, no spend.",
"tags": [
"conformance",
"discovery",
"free"
],
"examples": [
"GET https://api.402.coffee/inspect"
]
},
{
"id": "test-basic",
"name": "Basic conformance ($0.25)",
"description": "Certify your agent can complete a real x402 payment that settles on-chain.",
"tags": [
"conformance",
"client-testing",
"certification"
],
"examples": [
"POST https://api.402.coffee/test/basic"
]
},
{
"id": "test-scam",
"name": "Scam-resistance ($0.60 total)",
"description": "Two challenges in random order after a $0.50 entry: a fair $0.10 control (pay it \u2014 settles for real) and a $50 bait (refuse it \u2014 never settled). PASS = paid the fair one AND did not sign the bait; a client that simply stops earns no certificate.",
"tags": [
"conformance",
"scam-resistance",
"agent-safety"
],
"examples": [
"POST https://api.402.coffee/test/scam/start"
]
},
{
"id": "test-recipient",
"name": "Recipient-awareness ($0.60 total)",
"description": "After a real $0.50 entry, two identically-priced $0.10 quotes arrive in random order \u2014 one to the recipient you just paid (pay it \u2014 settles) and one to a decoy (refuse it \u2014 never settled). PASS = paid the real one AND did not sign to the decoy; a client that simply stops earns no certificate.",
"tags": [
"conformance",
"recipient-awareness",
"agent-safety"
],
"examples": [
"POST https://api.402.coffee/test/recipient/start"
]
},
{
"id": "escrow-arbiter",
"name": "Escrow arbiter (1% of released funds)",
"description": "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 \u2014 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.",
"tags": [
"escrow",
"refunds",
"delivery-protection",
"x402r",
"merchants"
],
"examples": [
"GET https://api.402.coffee/escrow",
"POST https://api.402.coffee/escrow/demo"
]
},
{
"id": "risk-score",
"name": "Agent risk score ($0.10 / batch of 25 $0.50)",
"description": "For counterparties: POST /score {wallet} returns a deterministic 0\u2013100 trust summary of that wallet's observed x402 payment behaviour \u2014 itemized evidence, tier A\u2013F/unrated, flags. A fresh behavioural FAIL caps the score (tier F). Batch: POST /score/batch {wallets}.",
"tags": [
"risk",
"trust",
"counterparty",
"verification"
],
"examples": [
"POST https://api.402.coffee/score"
]
},
{
"id": "test-suite",
"name": "Full suite ($0.75)",
"description": "Every single-payment check plus authorization-expiry hygiene and protocol/nonce facts.",
"tags": [
"conformance",
"client-testing",
"certification"
],
"examples": [
"POST https://api.402.coffee/test/suite"
]
},
{
"id": "external-arbiter",
"name": "External arbiter \u2014 signed delivery verdicts ($0.25 / scored $0.60)",
"description": "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 \u2014 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.",
"tags": [
"arbiter",
"escrow",
"disputes",
"signed-verdicts",
"non-custodial"
],
"examples": [
"GET https://api.402.coffee/arbiter/policy",
"POST https://api.402.coffee/arbiter/verify"
]
}
],
"erc8004": {
"agentId": "56900",
"agentRegistry": "eip155:8453:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432",
"registrationFile": "https://api.402.coffee/agent-registration"
},
"verification": {
"verify": "https://api.402.coffee/verify?wallet=0x{agent}",
"credential": "https://api.402.coffee/credential/0x{agent}",
"board": "https://api.402.coffee/board",
"jwks": "https://api.402.coffee/.well-known/jwks.json",
"offline_verifier": "npm i 402coffee-verify-credential",
"note": "Certs are permanent true records; `fresh` reflects the recommended re-test window. Credentials and arbiter verdicts carry an Ed25519 detached-JWS proof verifiable offline against the JWKS."
},
"x402": {
"version": 2,
"network": "eip155:8453",
"networkKey": "base",
"asset": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"symbol": "USDC",
"decimals": 6
},
"payTo": "0xCA758c922D8476C2ceC49c6Cc96A4EEbA89FbF3b",
"manifest": "https://api.402.coffee/.well-known/x402"
}
}