x402 Inspector

Scans a URL for an x402 payment challenge and reports whether the challenge is valid, invalid, malformed or absent, with evidence, warnings and the parsed accepts. x402 paid, $0.02 USDC on Base per call. Verified route: POST /api/v1/x402-inspector/x402-v2, taking {url}. At verification it performed a real live probe of the submitted target and reported its observation accurately. Important limitation: it probes with GET only and its input schema has no method parameter, so any endpoint that serves its challenge on POST is reported as having no challenge. POST-only is the common shape for x402 routes, so treat a no_challenge result as inconclusive rather than as evidence that an endpoint is unprotected. The badge covers delivery of a real paid scan, not the correctness of its verdicts. Base only.

1 route settlement-verified · $0.02 USDC/request · 1 endpoint / 1 tools · Data · base network · x402 protocol

Verified routes

• POST /api/v1/x402-inspector/x402-v2 · $0.02 · 2026-09-15 · receipt

Other routes are unverified.

Networks: Base (settlement-verified)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider

ContextIQ

Hosted at

contextiq.trango-compute.com

Category

Data

Price

$0.02 USDC per request

Endpoints

1

MCP tools

1

Payment networks

Base

Settlement-verified

1 route, last checked 2026-09-15

Listed on PayAPI Market

2026-09-15

Try x402 Inspector

Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.

curl -i -X POST "https://contextiq.trango-compute.com/api/v1/x402-inspector/x402-v2"

About this API

x402 Inspector is listed in the Data category with pricing at $0.02 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-15. View receipt on Basescan.

Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.

This API exposes 1 endpoint.

Questions about this API

What does x402 Inspector do?

Scans a URL for an x402 payment challenge and reports whether the challenge is valid, invalid, malformed or absent, with evidence, warnings and the parsed accepts. x402 paid, $0.02 USDC on Base per call. Verified route: POST /api/v1/x402-inspector/x402-v2, taking {url}. At verification it performed a real live probe of the submitted target and reported its observation accurately. Important limitation: it probes with GET only and its input schema has no method parameter, so any endpoint that serves its challenge on POST is reported as having no challenge. POST-only is the common shape for x402 routes, so treat a no_challenge result as inconclusive rather than as evidence that an endpoint is unprotected. The badge covers delivery of a real paid scan, not the correctness of its verdicts. Base only. It is provided by ContextIQ.

How much does x402 Inspector cost?

x402 Inspector is priced at $0.02 USDC per request, paid per call with no subscription. PayAPI Market paid 0.02 USDC for one call to /api/v1/x402-inspector/x402-v2 when it verified the listing. The exact amount for each call is in the HTTP 402 response before any money moves.

Do I need an API key or account to use x402 Inspector?

No. x402 Inspector uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has x402 Inspector been verified?

Yes, 1 route. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-09-15.

How does an AI agent find x402 Inspector?

Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.

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