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Agent Café Basic Test Endpoint (api.402.coffee)
x402
Agent Café Basic Test Endpoint (api.402.coffee) is a paid API for AI agents from api.402.coffee, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Accepts a USDC micropayment on Base via the x402 protocol and returns a payment receipt confirming the transaction.
Price / call$0.25
Success—
StatusUnknown
How this service works
x402 client conformance — basic. Pay to certify your agent can complete a real x402 payment; get a public certificate + README badge.
Output
A JSON object containing the transaction hash, a paid:true confirmation, the order name (e.g. 'espresso'), the amount paid in USDC, the network ('base'), the currency ('USDC'), a unique receipt number (e.g. 'AC-XXXXXX'), and a guestbook URL where the payment is recorded publicly.
Example use cases
Example prompt
“Send a real USDC payment on Base via the x402 protocol to the Agent Café test endpoint and bring back the receipt — I want to confirm you can actually complete an on-chain micropayment autonomously.”
Technical details
Endpoint
POSThttps://api.402.coffee/test/basicWhen to prefer
Use this endpoint when you need to demonstrate or test that an AI agent can autonomously execute a real on-chain USDC micropayment using the x402 protocol on Base, and obtain a cryptographically verifiable receipt. Prefer this over mock or sandbox payment endpoints when you need proof of live payment capability.
Side effects
- Insufficient USDC balance — payment cannot be authorized, x402 402 response returned
- Invalid or missing x402 payment header — request rejected before processing
- Network congestion on Base causing transaction delays or timeouts
- Transaction broadcast failure due to RPC issues on Base
- Duplicate payment attempt flagged by facilitator
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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