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x402-tools Val Before 402 Diagnostic
x402
x402-tools Val Before 402 Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).
Runs a paid x402 diagnostic check against a public URL to validate 402 payment-gating behavior before settlement, returning structured diagnostic metadata.
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
Returns a JSON object with the endpoint's SKU name, a descriptive note about the paid resource, its price in USDC, and a human-readable title. This allows agents to understand the payment gating configuration before committing a payment.
Example use cases
Pre-settlement integration check
“Before I pay anything, can you probe https://myapp.com/api/premium-data with a GET request using the x402 Val Before 402 tool and tell me what SKU and pricing info it returns?”
Debugging a 402 gating setup
“My endpoint at https://myservice.io/api/v2/report is supposed to return a 402 with EIP-3009 extras — can you run the Val Before 402 diagnostic on it to confirm everything looks right?”
Surveying unknown 402 endpoints
“I found this URL https://thirdparty.xyz/api/data and I think it's x402-gated — can you use the Val Before 402 check to inspect what it charges and what payment method it expects?”
Technical details
Endpoint
GEThttps://openclawproductions.com/api/v1/valbefore402?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to inspect or validate how a specific URL is configured for x402 payment gating before executing a payment — especially when debugging EIP-3009 response shapes, auditing paid SKU metadata, or confirming a new x402 integration is returning correct 402 headers and extras. Prefer this over generic HTTP probing tools when working specifically in the x402/EIP-3009 ecosystem with OpenX402 as facilitator.
Side effects
- Request made without valid x402 payment returns HTTP 402 with EIP-3009 extras — this is expected for unpaid calls
- Invalid or unreachable URL provided in the url/origin param returns an error or empty diagnostic
- Non-public or firewall-blocked origin URLs may fail silently
- Only OpenX402 is a supported facilitator; other facilitators will not process the payment and the call will be blocked
- GET/HEAD/DELETE are the only supported HTTP methods; other methods will be rejected by schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "valbefore402",
"note": "Example paid JSON shape. Not a live settle.",
"price": "$0.03",
"title": "Val Before 402"
}
}Tags
x402
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