Posylai — AI Email Builder MCP Server

by posylai Your server? Claim it

answering

Posylai — AI Email Builder is answering right now. Last checked 6 min ago. Last commit 10 Sep 2026.

Build responsive HTML email campaigns from any brand website: design, QA, export.

Uptime history 56 days of history · worst day 99%

56 days agonow

100.0%

Uptime 24h

92 of 92 checks

—

Tools

hidden behind auth

278 ms

Response time

average over 24h

Stars

last commit 10 Sep 2026

Nothing serious here today

Today is the operative word: we check Posylai — AI Email Builder every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email --transport http https://mcp.posylai.ru/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.posylai.ru/mcp

~/.codex/config.toml

[mcp_servers.email]
url = "https://mcp.posylai.ru/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "email": {
      "url": "https://mcp.posylai.ru/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "email": {
      "type": "http",
      "url": "https://mcp.posylai.ru/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://mcp.posylai.ru/mcp	streamable-http	needs key	305 ms	6 min ago

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Posylai — AI Email Builder — questions

Answers built from our own checks of this server.

Why is there no tool list for Posylai — AI Email Builder?

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 Posylai — AI Email Builder working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 278 ms. The bar chart above shows every period we have measured.

How do I connect Posylai — AI Email Builder?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form 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 Posylai — AI Email Builder need an API key?

Yes. Every time we knock, Posylai — AI Email Builder 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 Posylai — AI Email Builder?

It answers our handshake in 278 ms on average, which is faster than 53% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Posylai — AI Email Builder open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.posylai.ru, which runs on its operator's own terms.