Email Inbox API + Sending by Sendmux MCP Server: Install & Setup

Install Email Inbox API + Sending by Sendmux in Claude Code

Remote URL

Claude Code

claude mcp add --transport http email-inbox-api-sending-by-sendmux https://mcp.sendmux.ai/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "email-inbox-api-sending-by-sendmux": {
      "url": "https://mcp.sendmux.ai/mcp"
    }
  }
}

npm

Claude Code

claude mcp add email-inbox-api-sending-by-sendmux -- npx -y sendmux-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "email-inbox-api-sending-by-sendmux": {
      "command": "npx",
      "args": [
        "-y",
        "sendmux-mcp"
      ]
    }
  }
}

PyPI (uv)

Claude Code

claude mcp add email-inbox-api-sending-by-sendmux -e SENDMUX_MCP_SURFACES=... -e SENDMUX_MAILBOX_API_KEY=... -e SENDMUX_MANAGEMENT_API_KEY=... -- uvx sendmux-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "email-inbox-api-sending-by-sendmux": {
      "command": "uvx",
      "args": [
        "sendmux-mcp"
      ],
      "env": {
        "SENDMUX_MCP_SURFACES": "...",
        "SENDMUX_MAILBOX_API_KEY": "...",
        "SENDMUX_MANAGEMENT_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Email Inbox API + Sending by Sendmux MCP server do?

AI email inbox and sending tools with attachments, search, live events, and webhooks.

Is the Email Inbox API + Sending by Sendmux MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Email Inbox API + Sending by Sendmux run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Email Inbox API + Sending by Sendmux to Claude Code?

Run: claude mcp add --transport http email-inbox-api-sending-by-sendmux https://mcp.sendmux.ai/mcp

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