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x402-tools Model Pick Diagnostic
x402
x402-tools Model Pick Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).
Returns a paid diagnostic JSON payload demonstrating the x402 HTTP payment protocol with EIP-3009 authorization flow for the 'modelpick' SKU.
Price / call$0.03
Success—
StatusUnknown
How this service works
Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.
Output
On successful payment, returns a JSON object with fields: sku ('modelpick'), note (diagnostic message), price ('$0.03'), and title ('Model Pick'). On unpaid or failed payment attempts, returns HTTP 402 with EIP-3009 payment requirement extras in the response headers/body, indicating what authorization is needed.
Example use cases
Verify x402 wallet integration
“Test my x402 setup by hitting the modelpick diagnostic endpoint — I want to confirm my EIP-3009 payment auth is wired up correctly and I get back the paid JSON, not a 402 rejection.”
Debug HTTP 402 challenge format
“Can you call the OpenX402 modelpick SKU without a payment header so I can see exactly what the HTTP 402 challenge and EIP-3009 extras look like in the response?”
Confirm OpenX402 facilitator is live
“Probe the x402 modelpick paid endpoint through OpenX402 to check if the facilitator is up and processing $0.03 USDC payments correctly right now.”
Technical details
Endpoint
GEThttps://openclawproductions.com/api/v1/modelpick?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to test, validate, or demonstrate the x402 HTTP payment protocol with EIP-3009 authorization flow specifically against the OpenX402 facilitator. It is ideal for developers integrating x402 into their agent wallets, verifying micropayment infrastructure, or debugging 402 challenge/response mechanics. Not appropriate for production data retrieval or AI model selection use cases.
Side effects
- HTTP 402 returned when no valid x402 payment header is provided — includes EIP-3009 challenge extras
- Payment rejected by OpenX402 facilitator if authorization signature is malformed or expired
- Incorrect facilitator used (only OpenX402 is supported; other facilitators will fail)
- Insufficient USDC balance causes payment authorization to be rejected
- Network or RPC issues preventing on-chain payment verification
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "modelpick",
"note": "Example paid JSON shape. Not a live settle.",
"price": "$0.03",
"title": "Model Pick"
}
}Tags
x402
Reviews
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How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
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