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Truelist MCP Server

by truelist Your server? Claim it
answering

Truelist is answering right now. Last checked 9 min ago. 2 installs a week from npm. Last commit 15 Oct 2026.

Validate email addresses for deliverability and manage email validation batches with Truelist.

Uptime history 16 hours of history · worst hour 0%
16 hours agonow
55.2%
Uptime 24h
32 of 58 checks
—
Tools
hidden behind auth
437 ms
Response time
average over 24h
2
Installs / week
npm and PyPI

Truelist does not always answer

Over the last week it answered 55.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

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 9 min ago.

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

This one needs environment variables set before it will start: TRUELIST_API_KEY (Your Truelist API key (get one at https://app.truelist.io)). 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://api.truelist.io/mcp streamable-http sign-in 445 ms 9 min ago

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Truelist — questions

Answers built from our own checks of this server.

Why is there no tool list for Truelist?
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: 55.2% of checks in the last 24 hours got a reply.
Is Truelist working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 32 of 58 checks got a reply (55.2%), average response time 437 ms. The bar chart above shows every period we have measured.
How do I connect Truelist?
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 Truelist?
No API key is involved. Truelist 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 Truelist?
It answers our handshake in 437 ms on average, which is faster than 27% 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 Truelist?
The npm package truelist-mcp was installed 2 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Truelist open source?
Yes — it is published under the MIT licence, written in TypeScript and 0 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.