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x402 Client Compatibility Adapter (GET)
x402
x402 Client Compatibility Adapter (GET) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-13).
Converts a live HTTP 402 quote into a buyer-owned compatibility adapter with requirement selectors, retry templates, header maps, receipt requirements, and stop conditions — without paying the target endpoint.
Price / call$0.006
Success—
StatusUnknown
Output
Returns a structured compatibility adapter object including: requirement selector policy (which payment method to use), same-request retry template (headers/params to add), header compatibility map (how to translate between client formats), receipt requirements (what proof of payment is needed), and stop conditions (when to abort) — all derived from the live 402 response without executing payment.
Example use cases
Example prompt
“I need a compatibility adapter for the x402-protected endpoint at https://api.example.com/data — give me the retry template, header compatibility map, and stop conditions for my MCP runtime client with a max spend of $0.005 USDC, without actually paying it.”
Technical details
Endpoint
POSThttps://gpt55.558686.xyz/v1/tools/x402-client-compatibility-adapterWhen to prefer
Use this endpoint when you need to inspect and adapt to a live x402 payment requirement before committing funds — ideal for wallet agents, MCP runtimes, or first-payment clients that need to map 402 headers, build retry logic, and understand stop conditions without triggering a real payment. Prefer this GET variant when your client cannot send a JSON body (crawlers, simple agents, browser-based wallets).
Side effects
- No URL/endpoint/resource provided — returns validation error requiring at least one of url, endpoint, or resource
- Target endpoint is not a real HTTP 402 resource — adapter cannot be generated
- Target endpoint is unreachable or times out — timeout error up to 15000ms
- maxUsdc exceeds schema maximum of 100 — validation rejection
- Unsupported payment asset or network on the target endpoint — partial adapter with warnings
- x402 quote response is malformed or non-standard — parsing failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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