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x402-tools U-3 Source Diagnostic
x402
x402-tools U-3 Source Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-11).
Returns a paid diagnostic JSON payload for the U-3 Source SKU, gated behind x402 HTTP payment flow with EIP-3009 authorization; unpaid requests receive HTTP 402.
Price / call$0.04
Success—
StatusUnknown
How this service works
Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.
Output
Returns a JSON object containing the SKU identifier ('u3src'), a diagnostic note clarifying this is an example paid shape, the price ('$0.04'), and the title ('U-3 Source'). Unpaid or unauthenticated requests return HTTP 402 with EIP-3009 payment challenge extras specifying the required USDC micropayment and facilitator details.
Example use cases
Verify x402 payment flow end-to-end
“Test the x402 payment gating on the U-3 Source endpoint and confirm I get back the paid diagnostic JSON after the $0.04 USDC EIP-3009 authorization goes through.”
Debug HTTP 402 challenge behavior
“Hit the OpenX402 U-3 Source endpoint without a payment header and show me the full HTTP 402 response with the EIP-3009 extras so I can understand the challenge format.”
Confirm OpenX402 facilitator integration
“Ping the U-3 Source SKU through OpenX402 and show me whether my payment authorization is accepted and what the settled diagnostic payload looks like.”
Technical details
Endpoint
GEThttps://openclawproductions.com/api/v1/u3src?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to test or demonstrate the x402 micropayment protocol with EIP-3009 authorization, specifically with the OpenX402 facilitator. It is purpose-built for diagnosing x402 payment gating behavior — not for production data retrieval. Prefer it over other x402 test endpoints when you specifically need the U-3 Source SKU shape or want to validate OpenX402 facilitator compatibility at a $0.04 USDC price point.
Side effects
- HTTP 402 returned when no valid EIP-3009 payment authorization is included in the request
- Payment authorization rejected if wrong facilitator (non-OpenX402) is used
- Malformed properties parameter may yield unexpected behavior given minimal schema definition
- Network timeout if x402 payment settlement takes too long
- Invalid USDC token transfer signature causes payment rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "u3src",
"note": "Example paid JSON shape. Not a live settle.",
"price": "$0.04",
"title": "U-3 Source"
}
}Tags
x402
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