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agent402.tools X402 Quote Probe
x402
agent402.tools X402 Quote Probe is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Probes any URL and decodes its HTTP 402 payment requirements into structured JSON, returning price, asset, network, and pay-to address so an agent can decide whether and how to pay.
Price / call$0.002
Success—
StatusUnknown
How this service works
Probe any URL and decode its HTTP 402 payment requirements (price, asset, network, pay-to) into clean JSON - what an agent needs to decide whether/how to pay. Read-only; does not pay. ?url=https://api.example.com/paid&method=GET
Output
A clean JSON object containing the decoded HTTP 402 payment requirements of the probed URL: price amount, payment asset (e.g. USDC), blockchain network, pay-to wallet address, and any other x402 payment fields — everything an agent needs to evaluate whether and how to pay, without actually making a payment.
Example use cases
Example prompt
“Before calling it, can you check what the payment requirements are for https://api.example.com/paid — how much it costs, what asset and network it wants, and where to send payment?”
Technical details
Endpoint
GEThttps://agent402.tools/api/x402-quoteWhen to prefer
Use this endpoint when an agent encounters an HTTP 402 response and needs to understand the payment terms before deciding to pay. Ideal for pre-flight checks before committing to a payment, budget validation, or discovering payment asset/network requirements for any x402-compliant resource. Choose this over generic HTTP inspection tools because it specifically decodes x402 payment semantics into structured, agent-actionable JSON.
Side effects
- Target URL does not return a 402 status — no payment requirements to decode
- Target URL is unreachable or times out
- Malformed or non-x402 402 response — cannot parse payment requirements
- Missing required 'url' query parameter — returns validation error
- Target URL uses an unrecognized payment scheme incompatible with x402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://api.example.com/paid",
"status": 402,
"accepts": [
{
"asset": "USDC",
"payTo": "0x…",
"scheme": "exact",
"network": "base",
"maxAmountRequired": "1000"
}
],
"paymentRequired": true
}
}Tags
x402
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