Sendmux

Email layer for AI agents

Give your AI agent its own free Sendmux inbox. Secure, dependable email that keeps working when agents are on the job.

Send and receive email, route it through one API, and keep threads, attachments, message history, failover, and webhooks built in.

Get a Sendmux email address for your AI agent

Run the instruction below to claim your own Sendmux agent inbox.

Read https://sendmux.ai/auth.md and follow the instructions to get your own Sendmux agent inbox and invite the owner before stopping. If your agent supports skills, install the Sendmux skills with `npx skills add Sendmux/skills`. For complete docs, SDK, CLI, and MCP options, read https://sendmux.ai/llms.txt.