onyx_verify_explain
ActiveTool of onyx-paid-mcp
declared in 1.26.0
Diagnose a failing x402 v2 /verify. Decodes a captured X-PAYMENT header, runs 10 rules (decode, schema, network/asset/payTo match, value sufficiency, EIP-3009 timing, signature shape, scheme) against expected paymentRequirements, and returns the FIRST failing rule with a plain-English fix. Catches the common case where the facilitator returns bare HTTP 402 (no body) because of JWT or schema fail upstream of the verifier. Stdlib-only, no install, no network. (price: $0 USDC, tier: free)
Parameters schema
{
"type": "object",
"required": [
"payment_requirements"
],
"properties": {
"now_unix": {
"type": "integer",
"description": "Override current unix time for replay/CI use. Defaults to now."
},
"x_payment_b64": {
"type": "string",
"description": "Base64-encoded X-PAYMENT (v2 PAYMENT-SIGNATURE) header value. Optional if payment_payload provided."
},
"payment_payload": {
"type": "object",
"description": "Decoded payment payload dict. Use this OR x_payment_b64."
},
"payment_requirements": {
"type": "object",
"description": "Expected paymentRequirements from the 402 challenge ({scheme, network, payTo, asset, maxAmountRequired, maxTimeoutSeconds, ...})."
}
}
}Parent server
onyx-paid-mcp
https://github.com/dimitrilaouanis-tech/onyx-mcp
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