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x402 Wallet Funding Readiness Doctor (GET)
x402
x402 Wallet Funding Readiness Doctor (GET) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.006/call, status down (last checked 2026-10-12).
Diagnoses buyer-side gaps preventing a valid X-PAYMENT header from being created for an x402 quote, checking wallet address, USDC balance, spend cap, quote field matching, and client signing capability via GET parameters.
Price / call$0.006
Success—
StatusDown
Output
Returns a structured readiness report with an overall ok/fail status, plus per-check results covering wallet address validity, USDC balance sufficiency, spend cap adequacy, quote field matching (amount, payTo, network, asset), official x402 client readiness, typed-data signing capability, and same-request retry support — without ever sending a payment or requiring private keys.
Example use cases
Example prompt
“Can you run the x402 wallet readiness doctor on my wallet 0xAbC123...def for a quote at https://api.example.com/paid-resource that costs 0.005 USDC on Base, with a max spend cap of 0.01 USDC, and tell me if my wallet can sign typed data and supports same-request retry?”
Technical details
Endpoint
POSThttps://gpt55.558686.xyz/v1/tools/x402-wallet-funding-readiness-doctor?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or wallet needs to pre-flight check all buyer-side conditions before attempting an x402 payment — especially when debugging why a payment header cannot be constructed. Prefer this over generic wallet balance checkers because it covers the full x402 quote-to-header pipeline including typed-data signing, spend caps, and quote field matching in a single deterministic call that never touches private keys or sends actual payments.
Side effects
- Missing required 'input' or 'method' fields returns a 400 validation error
- Invalid wallet address format detected and flagged in diagnosis
- Quote URL unreachable or returns non-402 response — cannot inspect live quote
- Amount or network mismatch detected between provided params and actual quote
- Timeout if the target quote endpoint takes longer than 15000ms to respond
- Boolean fields like can_sign_typed_data provided as unrecognized string values
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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