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Railhook MCP Server

by vadymkykalo Your server? Claim it
answering

Railhook is answering right now. Last checked 5 min ago. 2 150 installs a week from npm. Last commit 21 Sep 2026.

Webhooks for AI agents: send events, manage endpoints, inspect and retry deliveries.

Installs per day peak 795 · avg 71
a month agotoday
Uptime history 4 days of history · worst day 98%
4 days agonow
98.9%
Uptime 24h
90 of 91 checks
Tools
hidden behind auth
130 ms
Response time
average over 24h
2 150
Installs / week
npm and PyPI

What the code does

We read the source, 6 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

  --purge            Uninstall, and delete the data volumes as well
  -h, --help         This text

${B}Passing options through a pipe${N}
  function spawn(rail: number, now: number) {
Asks for container control access monitoring/docker-compose.yml:195
      - /var/run/docker.sock:/var/run/docker.sock:ro
Sends data to a third-party sink railhook-ui/src/pages/landing/RailMap.tsx:140
          <Chip x={890} y={146} name="Slack" sub="hooks.slack.com" logo="slack" />

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

run in your terminal
claude mcp add railhook --transport http https://railhook.io/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "railhook": {
      "url": "https://railhook.io/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.railhook]
url = "https://railhook.io/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "railhook": {
      "url": "https://railhook.io/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "railhook": {
      "url": "https://railhook.io/mcp"
    }
  }
}

This one needs environment variables set before it will start: RAILHOOK_API_KEY (A Railhook project API key. A READ_ONLY key is enough to explore.), RAILHOOK_BASE_URL (Your Railhook origin when self-hosted. Defaults to https://railhook.io.). The author declared them in the registry entry; get the values from the project itself.

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URLTransportStateLatencyChecked
https://railhook.io/mcp streamable-http sign-in 252 ms 5 min ago

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Railhook — questions

Answers built from our own checks of this server.

Why is there no tool list for Railhook?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 98.9% of checks in the last 24 hours got a reply.
Is Railhook working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 90 of 91 checks got a reply (98.9%), average response time 130 ms. The bar chart above shows every period we have measured.
How do I connect Railhook?
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. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to Railhook?
No API key is involved. Railhook answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is Railhook?
It answers our handshake in 130 ms on average, which is faster than 81% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Railhook?
The npm package @railhook/mcp was installed 2 150 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Railhook open source?
Yes — it is published under the MIT licence, written in Java, 2 stars on GitHub and 3 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.