Your inbox, but it's a Cloudflare Durable Object with an AI intern

What it does Agentic Inbox is a web-based email client that sends and receives mail through Cloudflare Email Routing, with each mailbox isolated in its own Durable Object backed by SQLite and attachments stored in R2. It includes a side-panel AI agent—built on the Cloudflare Agents SDK and Workers AI—that can read messages, search conversations, draft replies, and queue them for your approval. The whole stack, from the React frontend to the Hono backend, runs on your own Cloudflare account without a traditional server.

The interesting bit The architecture isolates each mailbox inside its own Durable Object with a SQLite database rather than a shared backend, keeping storage and compute bundled at the edge. The project also doubles as a reference implementation for Cloudflare’s newer primitives: it consumes Email Routing and Email Service APIs, exposes an MCP server at /mcp for external AI tools, and leans hard into the “everything on Workers” vision.

Key highlights

• Full email client with rich-text composer, threading, folders, search, and R2-backed attachments
• Per-mailbox isolation via Durable Objects with SQLite persistence
• Built-in AI agent with 9 email tools, auto-drafts inbound replies, and requires explicit send confirmation
• MCP server endpoint lets external tools like Claude Code or Cursor operate on mailboxes
• Cloudflare Access is the sole authorization boundary; no per-mailbox permissions inside the app

Caveats

• Setup is explicitly not one-click: you must manually configure Email Routing, Email Service, and Cloudflare Access secrets after deployment
• Any user who passes the shared Cloudflare Access policy can access every mailbox by design; there is no internal per-mailbox authorization
• Production use requires Cloudflare Access to be enabled and kept in sync via Worker secrets

Verdict Developers already living in the Cloudflare ecosystem and looking to dogfood edge-native email should take a look. If you need granular mailbox permissions or a plug-and-play SaaS experience, this is not your inbox.