uni-msg WhatsApp MCP Server

by uni-msg Your server? Claim it

answering

uni-msg WhatsApp is answering right now. Last checked 11 min ago. 19 installs a week from npm.

Drive WhatsApp from any MCP client: pair devices, send text and media, manage contacts and groups.

Installs per day peak 15 · avg 4 · +37% w/w

a month agotoday

Uptime history 54 days of history · worst day 91%

54 days agonow

100.0%

Uptime 24h

92 of 92 checks

—

Tools

hidden behind auth

131 ms

Response time

average over 24h

Installs / week

npm and PyPI

Nothing serious here today

Today is the operative word: we check uni-msg WhatsApp 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 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add whatsapp --transport http https://uni-msg.com/mcp

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

{
  "mcpServers": {
    "whatsapp": {
      "url": "https://uni-msg.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.whatsapp]
url = "https://uni-msg.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "whatsapp": {
      "url": "https://uni-msg.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "whatsapp": {
      "url": "https://uni-msg.com/mcp"
    }
  }
}

This one needs environment variables set before it will start: UNIMSG_API_KEY (API key from uni-msg Dashboard → API Keys (starts with wsa_)). 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, but it did not say what kind of credentials it expects.

Endpoints

URL	Transport	State	Latency	Checked
https://uni-msg.com/mcp	streamable-http	needs auth	107 ms	11 min ago

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uni-msg WhatsApp — questions

Answers built from our own checks of this server.

Why is there no tool list for uni-msg WhatsApp?

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 uni-msg WhatsApp 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 131 ms. The bar chart above shows every period we have measured.

How do I connect uni-msg WhatsApp?

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 credentials: it refuses anonymous clients.

Does uni-msg WhatsApp need an API key?

Yes. Every time we knock, uni-msg WhatsApp 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 uni-msg WhatsApp?

It answers our handshake in 131 ms on average, which is faster than 79% 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.

How many people use uni-msg WhatsApp?

The npm package uni-msg-mcp-server was installed 19 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.