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x402 Endpoint Payability Checker
x402
x402 Endpoint Payability Checker is a paid API for AI agents from x402-meta.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Validates whether a given URL is a live x402 payment-gated endpoint by fetching it unpaid, then inspecting the 402 response, pricing, supported chains, and Bazaar listing details.
Price / call$0.02
Success—
StatusUnknown
How this service works
Is this URL a valid x402 endpoint? Fetches it once unpaid and checks the 402 offer, price, chains and Bazaar listing block.
Output
Returns a structured verdict object including: whether the URL is a valid x402 endpoint (verdict), x402 protocol version, list of USD prices, supported blockchain networks, payTo wallet addresses, HTTP status code received, Bazaar listing presence and validity flags, a human-readable summary and reasons, a degraded signal, and a timestamp (asOf).
Example use cases
Pre-integration x402 endpoint audit
“Before I integrate https://data.myservice.com/premium-feed into my agent, can you verify it's a valid x402 endpoint, confirm what price it charges, which blockchain networks it accepts, and whether its Bazaar listing looks correct?”
Debugging a misconfigured x402 service
“My x402 endpoint at https://tools.acme.com/ai-report isn't getting any buyers — can you probe it and tell me whether it returns a proper 402 response, what the verdict is, and flag any reasons it might be broken or degraded?”
Competitor x402 endpoint reconnaissance
“I'm building a competing service — can you check if https://api.rival.io/summarize is a live x402 endpoint, what it charges in USD, which chains it accepts payment on, and whether it's showing up on the Bazaar?”
Technical details
Endpoint
GEThttps://x402-meta.x402tookit.com/x402-payability?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify that a specific URL is a functioning x402 payment-gated resource before integrating it, listing it, or purchasing from it. Ideal for agent workflows that need to validate third-party x402 services, debug x402 configuration issues, or confirm Bazaar listing correctness. Prefer this over manual inspection or generic HTTP probing tools when you need structured x402-specific metadata including price, networks, and Bazaar status in a single call.
Side effects
- Target URL is not reachable or times out — httpStatus null, verdict negative
- URL returns 200 instead of 402 — flagged as not an x402 endpoint
- Malformed 402 response with missing price or network fields — reasons list populated
- Bazaar extension present but invalid — bazaarExtensionValid false
- URL contains credentials or is not a full https URL — input validation error
- Target endpoint rate-limits or blocks the probe request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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