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Leadbay MCP Server

answering

Leadbay is answering right now. Last checked 14 min ago. 2 208 installs a week from npm. Last commit 17 Sep 2026.

AI lead discovery, qualification, and outreach prep on your Leadbay account.

Installs per day peak 1 412 · avg 196 · +37% w/w
a month agotoday
Uptime history 48 days of history
48 days agonow
100.0%
Uptime 24h
91 of 91 checks
Tools
hidden behind auth
215 ms
Response time
average over 24h
2 208
Installs / week
npm and PyPI

What the code does

We read the source, 23 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.

File ships in the package but is absent from the source [пакет] installer/electron-main.cjs:1
этот файл ставится пользователю, но в репозитории его нет
        const child = spawn(cmd, args, spawnOpts);
Sends data to a third-party sink packages/core/src/client.ts:1124
      return this.mockRequestBinary<T>(method, path, contentType, body);

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 14 min ago.

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

This one needs environment variables set before it will start: LEADBAY_TOKEN (Bearer token, set by the installer. Run `npx -y -p @leadbay/mcp@latest installer` and sign in with your browser.), LEADBAY_REGION (us or fr - Leadbay backend that owns your account.), LEADBAY_MCP_WRITE (Set to 0 to hide composite write tools (default: 1, ON).), LEADBAY_MCP_ADVANCED (Set to 1 to expose granular API tools.), LEADBAY_TELEMETRY_ENABLED (Product-usage telemetry (PostHog/Sentry). Set to false to opt out. On a local/stdio install this env var is the ONLY way to stop telemetry — the account-level toggle (leadbay_set_telemetry) governs the hosted connector, not a local process (default: true).). 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://mcp.leadbay.app/mcp streamable-http sign-in 252 ms 14 min ago

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Leadbay — questions

Answers built from our own checks of this server.

Why is there no tool list for Leadbay?
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 Leadbay 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 215 ms. The bar chart above shows every period we have measured.
How do I connect Leadbay?
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 Leadbay?
No API key is involved. Leadbay 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 Leadbay?
It answers our handshake in 215 ms on average, which is faster than 64% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Leadbay?
The npm package @leadbay/mcp was installed 2 208 times in the last week. Week over week that is +37%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Leadbay open source?
Yes — it is published under the MIT licence, written in TypeScript, 0 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.