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Email Inbox API + Sending by Sendmux icon

Email Inbox API + Sending by Sendmux

Unverified Claim & verify → Communication

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

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Overview Installation

Overview

Email Inbox API + Sending by Sendmux is a Model Context Protocol server that brings AI email capabilities directly to your assistant. It provides inbox management, message sending, attachment handling, search functionality, live event streaming, and webhook support—all accessible as callable tools rather than requiring manual app switching.

You can run this server in two ways: connect to the hosted endpoint at https://mcp.sendmux.ai/mcp without any local setup, or install it locally via uvx sendmux-mcp on your machine. Both approaches require three environment variables for authentication: SENDMUX_MCP_SURFACES, SENDMUX_MAILBOX_API_KEY, and SENDMUX_MANAGEMENT_API_KEY. The latest release is v1.6.1, distributed under the MIT license with source code available at Sendmux/sendmux-sdk on GitHub.

Email Inbox API + Sending by Sendmux belongs in the Communication category and works with all major MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server for Sendmux, you can claim this listing to verify ownership and keep information up to date.

▸Hosted endpoint — Streamable HTTP · https://mcp.sendmux.ai/mcp
▸PyPI package — sendmux-mcp · MCP over stdio
▸Credentials — Requires SENDMUX_MCP_SURFACES, SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY
▸Open source — MIT license · Sendmux/sendmux-sdk
▸Topics — cli, cli-tool, email, email-automation, email-marketing

Installation

Settings → Connectors → Add custom connector
Name: Email Inbox API + Sending by Sendmux
URL:  https://mcp.sendmux.ai/mcp

Requires SENDMUX_MCP_SURFACES, SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY

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