X402 Audit MCP Server

by robertoyanguas-ops Your server? Claim it

answering

X402 Audit MCP is answering right now. Last checked 13 min ago. It exposes 2 tools.

Audits any URL for HTTP 402 x402 V2 compliance, PAYMENT-REQUIRED headers, Bazaar schema, and MCP.

Uptime history 68 hours of history · worst hour 75%

68 hours agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

216 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 14 October 2026. No other catalogue keeps this.

16 Oct 2 tools changed the parameters they ask for4 times that day audit_x402_and_a2a_endpoint, get_agent_wallet_status

16 Oct 2 tool descriptions were rewritten audit_x402_and_a2a_endpoint, get_agent_wallet_status

16 Oct a tool changed version

15 Oct 2 tool descriptions were rewritten audit_x402_and_a2a_endpoint, get_agent_wallet_status

15 Oct 2 tools changed the parameters they ask for audit_x402_and_a2a_endpoint, get_agent_wallet_status

14 Oct a tool description was rewritten audit_x402_and_a2a_endpoint

14 Oct a tool changed the parameters it asks for audit_x402_and_a2a_endpoint

and 2 more, back to 14 October 2026

X402 Audit MCP missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add x402-audit-mcp --transport http https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "x402-audit-mcp": {
      "url": "https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit"
    }
  }
}

~/.codex/config.toml

[mcp_servers.x402-audit-mcp]
url = "https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit"

.cursor/mcp.json

{
  "mcpServers": {
    "x402-audit-mcp": {
      "url": "https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "x402-audit-mcp": {
      "url": "https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

agent

get_agent_wallet_status

Show an agent's account: free calls used (of 5), prepaid USD balance, total spent, total calls and tokens saved. Free: it never charges or uses a free call. Call it before a batch of paid calls, or after a top-up to confirm the credit arrived. It does not process content or take payments; use the other tools on this server for that. Returns JSON with free_calls_used, balance_usd, total_spent_usd, total_tokens_saved.

audit

audit_x402_and_a2a_endpoint

Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP 402 settlement headers. Use it when your task needs this for one url; this endpoint offers only this tool and get_agent_wallet_status. Read-only; results are cached for 1 hour. $0.01 per call. Returns JSON with the result under data. Pricing: the first 5 calls per agent_id are free and failed calls are never charged. After that the tool returns a payment-required message (not an error) with a Stripe top-up link (from $2) and Base/Solana USDC addresses; pay, then repeat the same call with the same agent_id, or add tx_hash after a USDC transfer.

Endpoints

URL	Transport	State	Latency	Checked
https://x402-audit-72343955726.us-central1.run.app/mcp/x402-audit	streamable-http	answering	300 ms	13 min ago

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X402 Audit MCP — questions

Answers built from our own checks of this server.

What can X402 Audit MCP do?

It exposes 2 tools, read directly from the server on our last check. Among them: audit_x402_and_a2a_endpoint, get_agent_wallet_status. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is X402 Audit MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 216 ms. The bar chart above shows every period we have measured.

How do I connect X402 Audit MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does X402 Audit MCP need an API key?

No. X402 Audit MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is X402 Audit MCP?

It answers our handshake in 216 ms on average, which is faster than 58% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.