probe402 MCP Server

by probe402 Your server? Claim it

answering

probe402 is answering right now. Last checked 14 min ago. It exposes 2 tools.

Independent health, price and history for x402/MPP endpoints. Metered over x402; free grade on web.

Uptime history 71 days of history · worst day 95%

71 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

2128 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 10

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 2 September 2026. No other catalogue keeps this.

18 Oct 2 tools changed the parameters they ask for probe402_endpoint_grade, probe402_endpoint_history

18 Oct a tool description was rewritten probe402_endpoint_grade

8 Oct 2 tool descriptions were rewritten probe402_endpoint_grade, probe402_endpoint_history

15 Sep 2 tool descriptions were rewritten probe402_endpoint_grade, probe402_endpoint_history

3 Sep a tool description was rewritten probe402_endpoint_grade

2 Sep 2 tool descriptions were rewritten probe402_endpoint_grade, probe402_endpoint_history

Nothing serious here today

Today is the operative word: we check probe402 every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add endpoint-history --transport http https://probe402.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://probe402.com/mcp

~/.codex/config.toml

[mcp_servers.endpoint-history]
url = "https://probe402.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "endpoint-history": {
      "url": "https://probe402.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "endpoint-history": {
      "type": "http",
      "url": "https://probe402.com/mcp"
    }
  }
}

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.

probe402

probe402_endpoint_grade

The Machine Commerce Observatory: independent readings of x402 and MPP endpoints — alive right now, quoting what, and how fast? Probed on a published schedule under one published rubric, every reading traceable to a retained capture. Blocked and rate-limited are told apart from unreachable at capture time, so a defended endpoint is never reported as dead. Call before paying an unfamiliar endpoint, or to check whether one you use has repriced or rotated its payTo. This tool is the FREE grade: current observation plus 7 days of counts, by endpoint_id or by url. The same record our published reports are written from.

probe402_endpoint_history

Endpoints

URL	Transport	State	Latency	Checked
https://probe402.com/mcp	streamable-http	answering	1514 ms	14 min ago

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probe402 — questions

Answers built from our own checks of this server.

What can probe402 do?

It exposes 2 tools, read directly from the server on our last check. Among them: probe402_endpoint_grade, probe402_endpoint_history. 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 probe402 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 2128 ms. The bar chart above shows every period we have measured.

How do I connect probe402?

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

Does probe402 need an API key?

No. probe402 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.