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Agent Café Test Suite — x402 Payment Demo
x402
Agent Café Test Suite — x402 Payment Demo is a paid API for AI agents from api.402.coffee, paid per call via x402, $0.75/call, status unknown (last checked 2026-09-15).
Accepts a real USDC payment on Base via x402 protocol and returns a signed receipt proving the agent paid for a virtual espresso.
Price / call$0.75
Success—
StatusUnknown
How this service works
x402 client conformance — full suite. Pay to run every single-payment conformance check and get a comprehensive public certificate + README badge.
Output
Returns a JSON object containing: the on-chain transaction hash (tx), a boolean confirming payment (paid: true), the order item (e.g. 'espresso'), the amount paid in USDC ('0.10'), the network ('base'), the currency ('USDC'), a unique receipt number (e.g. 'AC-XXXXXX'), and a URL to the public guestbook wall where the payment is logged.
Example use cases
Example prompt
“Run the Agent Café test suite and pay for a virtual espresso with my Base wallet — I need back the transaction hash and the receipt number to prove the x402 payment went through on-chain.”
Technical details
Endpoint
POSThttps://api.402.coffee/test/suiteWhen to prefer
Choose this endpoint when you need to demonstrate, test, or validate a real x402 micropayment flow using USDC on Base — particularly when you need a verifiable on-chain receipt as proof of agent-initiated payment. Ideal for AI agent developers validating wallet infrastructure, testing autonomous payment capabilities, or showcasing x402 protocol integration in a live environment.
Side effects
- Insufficient USDC balance in agent wallet — payment rejected with 402 status
- Invalid or missing x402 payment header — returns 402 Payment Required
- Network congestion on Base causing transaction timeout
- Wrong network (not Base) — payment not accepted
- Amount mismatch — payment amount does not meet the $0.10 USDC requirement
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tx": "0x…",
"paid": true,
"order": "espresso",
"amount": "0.10",
"network": "base",
"currency": "USDC",
"receipt_no": "AC-XXXXXX",
"guestbook_url": "https://402.coffee/wall"
}
}Tags
x402
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