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Delx Token Echo 1
x402
Delx Token Echo 1 is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Echoes input text back with its character length, primarily for verifying that x402 pay-to-deliver payment wiring is functioning correctly.
Price / call$0.001
Success—
StatusUnknown
How this service works
Echo text with length (probe channel 1). Call when you verify x402 pay→deliver wiring with a trivial payload. Returns echo text, length, echo=1 for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
Output
Returns a JSON object containing the original echoed text, its character length, and an echo flag set to 1, confirming that the x402 pay-to-deliver pipeline processed the request successfully. No external network calls are made and no data is retained.
Example use cases
Pre-deployment x402 smoke test
“Before I launch my agent workflow, echo back the string 'ping' so I can confirm the x402 pay-and-deliver wiring is working end to end.”
New Base USDC wallet verification
“I just set up a new Base wallet with USDC — can you send a trivial echo request with the text 'test123' to confirm payments are going through properly?”
CI pipeline payment health check
“As part of my integration test, echo the text 'ci-check' back and confirm I get a length and echo=1 response, so I know the x402 channel is healthy.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/token-echo-1When to prefer
Choose this endpoint when you need the cheapest and simplest possible probe to confirm that an x402 micropayment channel on Base is correctly wired — before committing to more expensive or complex paid endpoints. It is ideal for CI smoke tests, new wallet validation, and integration bootstrapping where the payload itself is irrelevant and only the pay-to-deliver round trip matters.
Side effects
- Payment not received — x402 handshake fails, no response delivered
- Malformed input — missing or non-string text field returns a validation error
- Insufficient USDC balance — payment of $0.001 cannot be completed
- Network timeout during payment settlement on Base
- Empty text field submitted — length returns 0 but echo may still succeed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
Output
Schema · Response
{
"type": "json",
"example": {
"echo": 1,
"text": "ping-delx-1",
"length": 11,
"schema": "delx/util-token-echo-1/v1"
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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