Agent Protocol Inspector scan (MCP / A2A / ARD / llms.txt)

Agent protocol discovery scan with x402 USDC payment on Base. Verified route: POST /api/v1/agent-protocol-inspector/x402-v2 at 0.02 USDC, taking {url} and reporting MCP, A2A and ARD detection with evidence, plus llms.txt presence. Verified against payapi.market, where it confirmed the live MCP endpoint through a JSON-RPC handshake and located llms.txt, and correctly reported A2A and ARD as not detected. Base only.

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

Verified routes

• POST /api/v1/agent-protocol-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

About this API

Agent Protocol Inspector scan (MCP / A2A / ARD / llms.txt) is listed in the Intelligence 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.

How to call this API

Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.

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