JMAP MCP Server vs WhatsApp MCP Server (lharries)

A side-by-side comparison of two Communication servers — tools, transport, auth, maintenance, and copy-paste config for each.

	JMAP MCP Server MCP server for interacting with JMAP email servers (FastMail, Stalwart, Cyrus, James) — search, read, send, and manage email. Unverified stdio (local) API key TypeScript	WhatsApp MCP Server (lharries) Connect your personal WhatsApp: search, read and send messages and media locally Verified stdio (local) No auth Python
Category	Communication	Communication
Language	TypeScript	Python
Transport	stdio (local)	stdio (local)
Auth	API key	None
GitHub stars	172	5.7k
Last commit	7 days ago	1 month ago
Verified
Actively maintained
Install	`deno run --allow-net=api.fastmail.com --allow-env=JMAP_SESSION_URL,JMAP_BEARER_TOKEN,JMAP_ACCOUNT_ID jsr:@wyattjoh/jmap-mcp@0.6.4`	`git clone https://github.com/lharries/whatsapp-mcp && cd whatsapp-mcp/whatsapp-bridge && go run main.go`
Repo	Open	Open

Verdict

Pick JMAP MCP Server if you prefer its approach (mcp server for interacting with jmap email servers (fastmail, stalwart, cyrus, james) — search, read, send, and manage email).

Pick WhatsApp MCP Server (lharries) if you prefer the more popular, battle-tested option, and you want zero-setup with no API key.

Add JMAP MCP Server

Install / run

deno run --allow-net=api.fastmail.com --allow-env=JMAP_SESSION_URL,JMAP_BEARER_TOKEN,JMAP_ACCOUNT_ID jsr:@wyattjoh/jmap-mcp@0.6.4

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

{
  "mcpServers": {
    "jmap-mcp-server": {
      "command": "deno",
      "args": [
        "run",
        "--allow-net=api.fastmail.com",
        "--allow-env=JMAP_SESSION_URL,JMAP_BEARER_TOKEN,JMAP_ACCOUNT_ID",
        "jsr:@wyattjoh/jmap-mcp@0.6.4"
      ],
      "env": {
        "JMAP_SESSION_URL": "https://api.fastmail.com/jmap/session",
        "JMAP_BEARER_TOKEN": "YOUR_API_TOKEN"
      }
    }
  }
}

Add WhatsApp MCP Server (lharries)

Install / run

git clone https://github.com/lharries/whatsapp-mcp && cd whatsapp-mcp/whatsapp-bridge && go run main.go

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

{
  "mcpServers": {
    "whatsapp-mcp-server-lharries": {
      "command": "uv",
      "args": [
        "--directory",
        "/absolute/path/to/whatsapp-mcp/whatsapp-mcp-server",
        "run",
        "main.py"
      ]
    }
  }
}

FAQ

JMAP MCP Server or WhatsApp MCP Server (lharries) — which is better?

Pick JMAP MCP Server if you prefer its approach (mcp server for interacting with jmap email servers (fastmail, stalwart, cyrus, james) — search, read, send, and manage email). Pick WhatsApp MCP Server (lharries) if you prefer the more popular, battle-tested option, and you want zero-setup with no API key.

Can I use both JMAP MCP Server and WhatsApp MCP Server (lharries)?

Yes — MCP clients let you enable multiple servers at once. Add both configs to your client's mcpServers and use whichever tool fits the task.

Do JMAP MCP Server and WhatsApp MCP Server (lharries) work with Claude, Cursor and Windsurf?

Both do. Copy the per-client config below into Claude Desktop, Cursor, or Windsurf.

View JMAP MCP Server →View WhatsApp MCP Server (lharries) →More comparisons →