Reef MCP Server

by reefwith Your server? Claim it

answering

Reef is answering right now. Last checked 8 min ago. Last commit 24 Aug 2026.

Shared, living memory for you and your people — coves your AI assistant can read and write.

Uptime history 19 days of history · worst day 99%

19 days agonow

100.0%

Uptime 24h

91 of 91 checks

—

Tools

hidden behind auth

385 ms

Response time

average over 24h

Stars

last commit 24 Aug 2026

What the code does

We read the source, 13 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.

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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.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add reef --transport http https://reefwith.me/mcp

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

{
  "mcpServers": {
    "reef": {
      "url": "https://reefwith.me/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.reef]
url = "https://reefwith.me/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "reef": {
      "url": "https://reefwith.me/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "reef": {
      "url": "https://reefwith.me/mcp"
    }
  }
}

This endpoint answered with an authorization challenge — the server is running, but you need an API key or OAuth to use it.

Endpoints

URL	Transport	State	Latency	Checked
https://reefwith.me/mcp	streamable-http	needs key	419 ms	8 min ago

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Reef — questions

Answers built from our own checks of this server.

Why is there no tool list for Reef?

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 Reef 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 385 ms. The bar chart above shows every period we have measured.

How do I connect Reef?

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 will need your own key or an OAuth login: it refuses anonymous clients.

Does Reef need an API key?

Yes. Every time we knock, Reef answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.

How fast is Reef?

It answers our handshake in 385 ms on average, which is faster than 46% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Reef open source?

Yes — it is published under the AGPL-3.0 licence, written in Python and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.