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.
Who it is for: Developers/Engineering Teams
Core capabilities
- The Email API for AI Agents: Sendmux - The Email API for AI Agents, with Inboxes Sendmux pages render their main content without JavaScript. For product details, see product , pricing , and docs . Product
- Email tools weren't built for AI agents: Toggle theme Open main menu Home
- No complete stack: Signatures and quoted history stripped by default
- Not built for agents: Links, headers, and attachments available on request
- Zero provider flexibility: Batch message actions accept up to 100 IDs
Pricing
$0.15 · Free · Paid · $49.00 · $ 276.34 · $0.15
Updated 2026-08-17