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fastCRW MCP Server

answering

fastCRW is answering right now. Last checked 13 min ago. Last commit 18 Sep 2026.

Scrape, crawl, map & search the web. Open-source, self-hostable Rust crawler & search for AI agents.

Uptime history 47 days of history · worst day 99%
47 days agonow
100.0%
Uptime 24h
91 of 91 checks
Tools
hidden behind auth
186 ms
Response time
average over 24h
1047
Stars
last commit 18 Sep 2026

What the code does

We read the source, 18 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.

Builds a file path from a variable mcp/crw-mcp/bin/crw-mcp.js:97
  const bin = path.join(dir, binName);
Runs an external command sdks/typescript/src/local.ts:40
    const proc = spawn(bin, [], { stdio: ["pipe", "pipe", "ignore"] });
Runs an external command sdks/python/src/crw/client.py:749
            self._process = subprocess.Popen(
In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Sends data to a third-party sink .github/workflows/bump-saas-pin.yml:131
          curl -s -m 10 "https://api.telegram.org/bot${TG_TOKEN}/sendMessage" \

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 13 min ago.

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

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://fastcrw.com/mcp streamable-http sign-in 243 ms 13 min ago

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answering

fastCRW — questions

Answers built from our own checks of this server.

Why is there no tool list for fastCRW?
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: 100.0% of checks in the last 24 hours got a reply.
Is fastCRW 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 186 ms. The bar chart above shows every period we have measured.
How do I connect fastCRW?
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 fastCRW?
No API key is involved. fastCRW 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 fastCRW?
It answers our handshake in 186 ms on average, which is faster than 69% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is fastCRW open source?
Yes — it is published under the AGPL-3.0 licence, written in Rust, 1 047 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.