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Faro x402 Payment Support Checker
x402
Faro x402 Payment Support Checker is a paid API for AI agents from byfaro.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Checks whether a website supports x402 HTTP payment protocol and agent-commerce payment discovery, returning a yes/no verdict plus detailed sub-checks and remediation hints.
Price / call$0.01
Success—
StatusUnknown
How this service works
Check if ChatGPT, Claude, Gemini and Perplexity can find, read and recommend your site. Get your free AI visibility score in 30 seconds, with fixes.
Output
Returns a boolean yes/no verdict on whether the site is x402-ready, along with granular sub-check results covering x402 HTTP header support, /.well-known payment discovery endpoint presence, and agent-commerce readiness signals, plus actionable fixes for any failed checks.
Example use cases
Pre-purchase payment compatibility check
“I want my agent to buy a report from datavendor.io — can you first check if their site supports x402 so we know whether autonomous payment will work?”
Vetting new API vendors for agent pipeline
“We're considering integrating three new data providers into our agent workflow — start by checking if api.newsservice.com supports x402 agent payments and report what's missing if it doesn't.”
Debugging failed autonomous payment attempt
“My agent tried to pay infra-tools.dev and it failed — can you run an x402 check on that site to see what payment support is actually in place and what needs to be fixed?”
Technical details
Endpoint
POSThttps://byfaro.ai/agent/check/x402?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to determine before attempting a purchase whether a target website is capable of receiving autonomous x402 payments — especially useful in agentic shopping workflows, API integration vetting, and debugging payment failures. Prefer this focused x402 check over Faro's full 47-point audit when you only need the payment-readiness signal quickly and cheaply.
Side effects
- Invalid or unreachable URL returns an error with no scan results
- URL missing scheme (not absolute) causes validation failure
- Site behind firewall or CAPTCHA may return inconclusive results
- Timeouts on slow-responding sites may yield incomplete sub-checks
- False negatives if x402 signals are dynamically injected client-side
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Absolute URL of the website to scan, e.g. https://example.com |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com",
"answer": false,
"checks": [
{
"id": "x402-payment",
"label": "x402 payment support",
"passed": false
}
],
"signal": "x402",
"checksTotal": 4,
"checksPassed": 1
}
}Tags
x402
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