Crimson Crawler MCP Server

by crimsoncrawler Your server? Claim it

answering

Crimson Crawler is answering right now. Last checked 1 min ago.

Enrich, search, assess, and manage threat intelligence through 80+ typed MCP tools.

Uptime history 50 days of history · worst day 95%

50 days agonow

95.7%

Uptime 24h

88 of 92 checks

—

Tools

hidden behind auth

817 ms

Response time

average over 24h

OAuth sign-in

Access

streamable-http

Crimson Crawler does not always answer

Over the last week it answered 98.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not 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 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp-server --transport http https://crimsoncrawler.com/mcp/v1

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

{
  "mcpServers": {
    "mcp-server": {
      "url": "https://crimsoncrawler.com/mcp/v1"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcp-server]
url = "https://crimsoncrawler.com/mcp/v1"

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "url": "https://crimsoncrawler.com/mcp/v1"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "url": "https://crimsoncrawler.com/mcp/v1"
    }
  }
}

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

URL	Transport	State	Latency	Checked
https://crimsoncrawler.com/mcp/v1	streamable-http	sign-in	414 ms	1 min ago

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Crimson Crawler — questions

Answers built from our own checks of this server.

Why is there no tool list for Crimson Crawler?

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: 95.7% of checks in the last 24 hours got a reply.

Is Crimson Crawler working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 88 of 92 checks got a reply (95.7%), average response time 817 ms. The bar chart above shows every period we have measured.

How do I connect Crimson Crawler?

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 Crimson Crawler?

No API key is involved. Crimson Crawler 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 Crimson Crawler?

It answers our handshake in 817 ms on average, which is faster than 14% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.