Fulcru MCP Server

by gsmmediaro Your server? Claim it

answering

Fulcru is answering right now. Last checked 2 min ago. Last commit 29 Jul 2026.

Find where ChatGPT names your competitor, write the page that closes the gap, measure it.

Uptime history 52 days of history · worst day 91%

52 days agonow

92.4%

Uptime 24h

85 of 92 checks

—

Tools

hidden behind auth

125 ms

Response time

average over 24h

Stars

last commit 29 Jul 2026

Fulcru does not always answer

Over the last week it answered 96.7% 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 2 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add fulcru --transport http https://api.fulcru.app/mcp

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

{
  "mcpServers": {
    "fulcru": {
      "url": "https://api.fulcru.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.fulcru]
url = "https://api.fulcru.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "fulcru": {
      "url": "https://api.fulcru.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "fulcru": {
      "url": "https://api.fulcru.app/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, but you need an API key from its owner to call it.

Endpoints

URL	Transport	State	Latency	Checked
https://api.fulcru.app/mcp	streamable-http	needs key	178 ms	2 min ago

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Fulcru — questions

Answers built from our own checks of this server.

Why is there no tool list for Fulcru?

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: 92.4% of checks in the last 24 hours got a reply.

Is Fulcru working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 85 of 92 checks got a reply (92.4%), average response time 125 ms. The bar chart above shows every period we have measured.

How do I connect Fulcru?

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: it refuses anonymous clients.

Does Fulcru need an API key?

Yes. Every time we knock, Fulcru 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 Fulcru?

It answers our handshake in 125 ms on average, which is faster than 86% 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.

Is Fulcru open source?

Yes — it is published under the AGPL-3.0 licence, written in JavaScript, 0 stars on GitHub and 5 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.