Cloudflare · 2026-04-16 · major
Cloudflare Email for Agents — Native Bidirectional Email for AI Agents (Public Beta)
Cloudflare opens Email for Agents in public beta — Workers-based agents can now send and receive email natively with an SDK onEmail hook, HMAC-signed reply routing, and Durable Objects state persistence.
Cloudflare's Agents SDK gains first-class email — agents can receive, process, and reply to email as a native interaction mode.
Key specs
| Status | Public beta (Workers Paid plan) |
|---|---|
| Sdk hook | onEmail |
| Signing | HMAC-SHA256 |
| Storage | Durable Objects + SQLite |
What is it?
Cloudflare Email for Agents is a public beta service that lets Workers-based AI agents send and receive email without a third-party provider. Developers route inbound email to specific agent instances by address (e.g. support@yourdomain.com routes to a dedicated Durable Object), persist conversation state across email threads, and send transactional replies. An open-source reference app, Agentic Inbox, ships alongside as a one-click Cloudflare deploy.
How does it work?
On the receive side, the Agents SDK exposes an onEmail lifecycle hook — any email to a routed address triggers that handler on the specific Durable Object instance for that thread, giving the agent access to all prior state. Replies use HMAC-SHA256-signed return addresses so the correct agent instance handles the response. On the send side, a native Workers binding manages SPF/DKIM/DMARC automatically with global delivery. An Email MCP server additionally exposes email tools to coding agents.
Why does it matter?
Most agent deployments are limited to HTTP and WebSocket — users must come to the agent. Email is where enterprise workflows already live: ticket systems, invoice processing, support threads, multi-agent escalation chains. Native email support means agents can participate in these flows without requiring users to change how they communicate. The asynchronous model also fits naturally with long-running agent tasks that need time to reason before replying.
Who is it for?
Developers building customer support agents, enterprise automation bots, or any agent that needs to participate in async email workflows.
Try it
https://developers.cloudflare.com/email-service/