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Sendmux MCP server

Sendmux MCP is Sendmux's MCP server in the official registry (io.github.Sendmux/sendmux-mcp). Declared transport: Streamable HTTP (remote), stdio (local, pypi).

★ 65 GitHub stars · 2026-10-17

Real user ratings coming soon

Transport	Streamable HTTP (remote), stdio (local, pypi)
Auth	Local install declares secret environment variables
Registry name	io.github.Sendmux/sendmux-mcp · 1.1.3
Source	https://github.com/Sendmux/sendmux-sdk
Remote endpoints	https://mcp.sendmux.ai/mcp
Data source	Official MCP Registry
Kind	Community
GitHub stars	65 GitHub stars, fetched 2026-10-17
Date checked	2026-10-17
License	MIT
Last commit	2026-10-14

Install

Configs are generated only from packages and remotes on the registry entry. Empty optional flags are listed instead of inserted. Nothing is added that the entry does not declare.

Remote

https://mcp.sendmux.ai/mcp

Claude Desktop · mcpServers

{
  "mcpServers": {
    "sendmux-mcp": {
      "url": "https://mcp.sendmux.ai/mcp"
    }
  }
}

Cursor · mcpServers

{
  "mcpServers": {
    "sendmux-mcp": {
      "url": "https://mcp.sendmux.ai/mcp"
    }
  }
}

VS Code · .vscode/mcp.json

{
  "servers": {
    "sendmux-mcp": {
      "type": "http",
      "url": "https://mcp.sendmux.ai/mcp"
    }
  }
}

Claude Code · .mcp.json

{
  "mcpServers": {
    "sendmux-mcp": {
      "type": "http",
      "url": "https://mcp.sendmux.ai/mcp"
    }
  }
}

claude mcp add

claude mcp add --transport http sendmux-mcp https://mcp.sendmux.ai/mcp

Local package (pypi)

Claude Desktop · mcpServers

{
  "mcpServers": {
    "sendmux-mcp": {
      "command": "uvx",
      "args": [
        "[email protected]"
      ],
      "env": {
        "SENDMUX_MCP_SURFACES": "mailbox,management,sending",
        "SENDMUX_MAILBOX_API_KEY": "<YOUR_SENDMUX_MAILBOX_API_KEY>",
        "SENDMUX_MANAGEMENT_API_KEY": "<YOUR_SENDMUX_MANAGEMENT_API_KEY>",
        "SENDMUX_SENDING_API_KEY": "<YOUR_SENDMUX_SENDING_API_KEY>"
      }
    }
  }
}

Cursor · mcpServers

{
  "mcpServers": {
    "sendmux-mcp": {
      "command": "uvx",
      "args": [
        "[email protected]"
      ],
      "env": {
        "SENDMUX_MCP_SURFACES": "mailbox,management,sending",
        "SENDMUX_MAILBOX_API_KEY": "<YOUR_SENDMUX_MAILBOX_API_KEY>",
        "SENDMUX_MANAGEMENT_API_KEY": "<YOUR_SENDMUX_MANAGEMENT_API_KEY>",
        "SENDMUX_SENDING_API_KEY": "<YOUR_SENDMUX_SENDING_API_KEY>"
      }
    }
  }
}

VS Code · .vscode/mcp.json

{
  "servers": {
    "sendmux-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "[email protected]"
      ],
      "env": {
        "SENDMUX_MCP_SURFACES": "mailbox,management,sending",
        "SENDMUX_MAILBOX_API_KEY": "<YOUR_SENDMUX_MAILBOX_API_KEY>",
        "SENDMUX_MANAGEMENT_API_KEY": "<YOUR_SENDMUX_MANAGEMENT_API_KEY>",
        "SENDMUX_SENDING_API_KEY": "<YOUR_SENDMUX_SENDING_API_KEY>"
      }
    }
  }
}

Claude Code · .mcp.json

{
  "mcpServers": {
    "sendmux-mcp": {
      "command": "uvx",
      "args": [
        "[email protected]"
      ],
      "env": {
        "SENDMUX_MCP_SURFACES": "mailbox,management,sending",
        "SENDMUX_MAILBOX_API_KEY": "<YOUR_SENDMUX_MAILBOX_API_KEY>",
        "SENDMUX_MANAGEMENT_API_KEY": "<YOUR_SENDMUX_MANAGEMENT_API_KEY>",
        "SENDMUX_SENDING_API_KEY": "<YOUR_SENDMUX_SENDING_API_KEY>"
      }
    }
  }
}

claude mcp add

claude mcp add sendmux-mcp -- uvx [email protected]

FAQ

What transport does Sendmux MCP use?

Streamable HTTP (remote), stdio (local, pypi).

What credentials are declared for Sendmux MCP?

Local install declares secret environment variables.

When was this checked, and what is the source?

These facts were checked on 2026-10-17. Registry name: io.github.Sendmux/sendmux-mcp. Source: https://github.com/Sendmux/sendmux-sdk.

Category hub: Media & Video. Client indexes: Claude, Cursor, VS Code. This listing is in The MCP Vault until it graduates.

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