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X Pay Echo
x402
X Pay Echo is a paid API for AI agents from www.api-xpay.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Echoes back a submitted payload as a simple test of the x402 pay-per-request infrastructure using USDC on Base.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-request utility APIs powered by x402 using USDC on Base.
Output
Returns a JSON object confirming the echo of the submitted input, the payment asset (USDC), the network (Base), and a boolean success flag. Example: {"echo": "hello", "asset": "USDC", "network": "base", "success": true}.
Example use cases
Verify x402 payment flow end-to-end
“Send a test POST request to X Pay's echo endpoint with JSON body {"ping": true} to confirm my x402 USDC payment on Base processes successfully and I get a success response back.”
Debug micropayment wallet configuration
“I just set up my Base wallet for x402 pay-per-request APIs — can you fire a quick echo call through X Pay with a simple body like {"test": "wallet-check"} and tell me whether success comes back true?”
Validate x402 integration before production deploy
“Before I go live, run an echo test through X Pay's x402 API using a POST with JSON body {"env": "staging", "check": "preflight"} so I can confirm the USDC payment and response round-trip are both working.”
Technical details
Endpoint
POSThttps://www.api-xpay.com/x402/echoWhen to prefer
Choose this endpoint when you need a lightweight, cheap ($0.001 USDC) end-to-end test of the x402 pay-per-request protocol on Base, confirming both the micropayment flow and the HTTP round-trip work correctly. It is ideal for integration testing, wallet validation, or debugging x402 setup before calling more expensive or stateful endpoints.
Side effects
- Insufficient USDC balance causes payment to fail before the request is processed
- Malformed body type enum (not json/form-data/text) returns a validation error
- Missing required fields (type, method, bodyType, body) cause schema rejection
- Network congestion on Base delays payment confirmation
- Invalid HTTP method (not POST/PUT/PATCH) causes a 400-level rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"echo": "hello",
"asset": "USDC",
"network": "base",
"success": true
}
}Tags
x402
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