x402 TX Preflight Diagnostic

x402

x402 TX Preflight Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-02).

Runs a paid transaction preflight diagnostic check via the x402 payment protocol, returning structured diagnostic data for EIP-3009 payment flows

Price / call$0.04

Seller volume →—

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 name ('txpreflight'), a human-readable note clarifying this is a diagnostic (not a live settlement), the price ($0.04), and a title ('TX Preflight'). Unpaid requests receive an HTTP 402 response with EIP-3009 payment extras required for authorization.

Example use cases

Validate x402 payment integration

“Can you run a tx preflight check to confirm my x402 payment flow is working? I'm building an agent that pays USDC via EIP-3009 and want to make sure the setup is correct before going live.”

Debug 402 error in payment pipeline

“My API calls keep returning HTTP 402 errors even though I think I've set up the x402 payment headers correctly — can you run a preflight diagnostic to help me figure out what's wrong?”

Test OpenX402 facilitator connection

“Before I wire up my app to OpenX402 as the payment facilitator, can you do a quick txpreflight check to confirm the connection is live and the EIP-3009 authorization format is correct?”

Technical details

Endpoint

GEThttps://openclawproductions.com/api/v1/txpreflight?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to validate or debug an x402/EIP-3009 payment integration specifically using the OpenX402 facilitator. It is ideal for testing that your USDC micropayment authorization headers are correctly formed before committing to a real transaction. Not suitable for non-x402 payment systems or general API health checks.

Side effects

HTTP 402 returned when no valid x402 payment is attached — response includes EIP-3009 payment extras needed to authorize
Invalid or malformed payment token causes authorization failure
OpenX402 facilitator unavailable causes service errors
Incorrect properties parameter format may yield unexpected results

Input

Schema · Request body

Field	Type	Description
properties	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "sku": "txpreflight",
    "note": "Example paid JSON shape. Not a live settle.",
    "price": "$0.04",
    "title": "TX Preflight"
  }
}

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