Sendmux
Sendmux is an email API that gives every AI agent a real inbox. Send and receive, route outbound through your own providers, and fail over automatically.
Sendmux at a Glance
- Pricing
- Freemium
- How you use it
- API, SMTP, web app, SDKs, CLI, or MCP server
- Who it's for
- AI agents and companies building platforms for agents
- Works with
- Gmail SendGrid Mailgun Resend SMTP LangChain Claude Code
Sendmux Key Features
- Agent email inboxes
- Email sending and receiving
- Provider routing and failover
- Unified inbox management
- Webhook and SSE events
Can't Find What You're Looking For?
We build custom AI agents tailored to your specific business needs. From ideation to deployment, TinyAI.Tools is your partner in AI innovation.
No commitment required. Let's discuss your ideas.
Sendmux Alternatives
Email Layer for AI Agents
Get a free Sendmux AI agent inbox. Secure, reliable email to send/receive and route via one API with threads, attachments, history, failover, and webhooks.
LAP
Without specs, agents hallucinate and fail 60% of the time. LAP gives them verified, agent-native API specs -- 2x more accurate, 10x smaller, 1,500+ APIs ready.
SendRaven
Give AI agents email they can send, receive and thread over API or MCP. Campaigns, automations, approvals, and pay-per-send pricing.
open-agent-email
Open-source email infrastructure for AI agents: secure inboxes, REST and MCP APIs, SMTP, human approval workflows, signed webhooks, and Python and TypeScript SDKs. Self-host with Docker and PostgreSQL. - Anil-matcha/open-agent-email
sentio
Email inbox API for AI agents. Give every agent its own real email address, receive mail as structured webhooks, and reply in-thread over REST. A complete multi-tenant mail server in Rust: inbound and outbound, DKIM/SPF/DMARC/ARC, MTA-STS, DANE, thre
Nuvrail
Approval gateway for AI agents' email: an IMAP/SMTP proxy that stages every write (move, delete, send) for human sign-off. Self-hosted, AGPL-3.0. - agens-field/nuvrail