THE $1 EMAIL LAYER Human + agent mail

Give your agent a real inbox. Keep a human in the thread.

A real custom-domain mailbox for people and AI agents—with a web inbox, API, webhooks, and MCP. From $1/month billed yearly: email infrastructure without the office-suite bill.

Start an agent mailbox Connect with MCP
Your custom domain Scoped access 1,000 events included
MAILBOX / ACCESS LEDGER LIVE
ADDRESSagent@yourcompany.comCUSTOM DOMAIN
PEOPLEWeb inbox

Read · review · reply

↔
AGENTScoped key

Read · draft · send

APIWEBHOOKSMCP
CONTROL STATUSMailbox-scoped permissions
READY
ALL EMAIL FEATURES$12per year
PRICED LIKE INFRASTRUCTURE, NOT AN OFFICE SUITE$1 / MONTH

When email is all you need, only pay for email.

ONE MAILBOX / TWO KINDS OF USER

Built for software. Still usable by people.

Agents get clean interfaces. Humans get a real inbox. Both work from the same durable address and conversation history.

WEB INBOX

A mailbox humans can actually open

Read, search, draft, reply, and step into a conversation when an agent needs judgment.

API + SDK

Email your product can work with

Use typed mailbox, thread, message, draft, attachment, and policy resources from your server.

WEBHOOKS

New mail, delivered to your workflow

React to inbound messages and delivery events with signed webhook notifications and automatic retries.

MCP

An inbox agents can use directly

Connect an MCP client with a scoped API key instead of teaching an agent to operate a consumer inbox.

HUMAN-IN-THE-LOOP, BY DESIGN

Let the agent work. Keep the handoff obvious.

Use a narrow API key for the work the agent should do. Let it read, classify, or prepare a draft—then open the same thread in the web inbox when a person needs to decide.

Read the security guide
  1. 01
    Mail arrives

    The complete message stays in a persistent, searchable mailbox.

  2. 02
    The agent handles routine work

    API, webhook, or MCP access uses only the permissions you grant.

  3. 03
    A human takes over when needed

    Review the draft or reply from the same web inbox and thread.

THE LEAN EMAIL STACK

As lean as paid custom-domain email gets.

No calendar, meetings, documents, chat, campaign builder, or per-seat office bundle. Just the email layer for a person, a product, or an agent.

  • Send and receive on your domain
  • Web inbox, forwarding, API, SDK, webhooks, and MCP
  • 1,000 monthly email events included
THREE MOVES TO A REAL ADDRESS

Domain in. Agent connected.

01

Add your domain

Copy the generated MX, DKIM, SPF, and DMARC records into your DNS provider.

02

Create the mailbox

Choose the address and give people explicit private or shared access.

03

Connect the agent

Create a scoped key, then use the API, SDK, webhook events, or MCP endpoint.

AGENT
READY

REAL MAILBOX · REAL DOMAIN · $1/MONTH

Give the agent an address. Keep the inbox human.

Start for $12 a year with every email feature and 1,000 monthly events.
Start an agent mailbox SDK + examples