Your inbox, wired to the agents you already use.

Postage is a native Mac email client with a built-in MCP server. Claude Code, Codex, Claude Desktop, Cursor and others work with your mail using the accounts you are already signed in to. You approve every send.

Postage goes on sale soon: $39 one-time, or on the Mac App Store. Get one email at launch.

Questions first? Support.

One command per client

Postage runs the server on your Mac, on 127.0.0.1 only. Add it to a client and ask for what you want: summarize what came in overnight, archive the newsletters, draft replies to the three that matter.

Claude Code

claude mcp add --transport http --scope user postage http://127.0.0.1:47913/mcp \
  --header "Authorization: Bearer YOUR_POSTAGE_TOKEN"

Codex CLI: ~/.codex/config.toml

[mcp_servers.postage]
url = "http://127.0.0.1:47913/mcp"
bearer_token_env_var = "POSTAGE_MCP_TOKEN"

Claude Desktop, Cursor, VS Code, Windsurf, Zed and Gemini CLI too. Setup for every client and what each can access.

Step 1

Add your accounts

Step 2

Pick a client

Open Integrations, choose Claude Code, Codex, Cursor or another client, and copy the command.

Step 3

Set what it can do

Read only, Read + organize, or Full. You can revoke a client at any time.

You stay in charge

Agents never send silently. A send request opens a sheet in Postage with Send, Edit and Cancel. The agent waits for you.
Three access levels. Read only, Read + organize, or Full, set per client and enforced by the server.
Localhost only. Each client gets its own token in your Keychain that you can revoke. No LAN mode, no cloud relay.
Email is untrusted. Message bodies reach agents marked as untrusted content, so a hostile email cannot quietly steer them.

Also a very good email app

Native and fast

SwiftUI on macOS, not a web view in a wrapper. Opens instantly and stays light on memory and battery.

Keyboard first

Apple Mail style shortcuts and menus. Triage a full inbox without touching the mouse.

One unified inbox

Every account in one list, or one account at a time. Any IMAP and SMTP provider.

Rules that think

Write a rule in plain English. Apple Intelligence runs it on your Mac, or bring your own Anthropic or OpenAI key.

Private by design

Mail goes between your Mac and your provider. No Postage server sits in the middle, and there is no telemetry.

Paid once

$39, no subscription, no ads, no free tier that sells your attention.

Get Postage

$39 one-time from this site, or $39.99 on the Mac App Store. 30-day refund. Pricing details.

Postage goes on sale soon: $39 one-time, or on the Mac App Store. Get one email at launch.

Questions first? Support.