Backed by

Combinator

Email Inboxes for AI Agents

AgentMail is the email inbox API for AI agents. It gives agents their own email inboxes, like Gmail does for humans.

No credit card required

from agentmail import AgentMail

client = AgentMail()

inbox = client.inboxes.create(
    username="hello",
    domain="agentmail.to"
)

Live Inbox

This is a real email inbox just created for you.

Send it an email and see it show up in real time.

AI Companies building on AgentMail.

[ What we offer ]

It's not AI for your email. It's email for your AI.

Create, manage, and operate email inboxes entirely via API.

[ By the numbers ]

Built for scale.

100M+

Emails delivered

Across the globe, and counting.

Always On

Enterprise-grade reliability

Built on redundant infrastructure across multiple regions. Your agents never miss a message.

Instant Inboxes

One API call

Spin up a new inbox in milliseconds. No domain verification, no waiting.

Developer First

Simple, intuitive API

RESTful endpoints, typed SDKs, and webhooks. Get started in minutes, not days.

[ Use Cases ]

Use Cases

Powering every type of agent: from browser automation to customer service, AgentMail enables any agent to communicate via email.

AgentMail Inbox

acme.com

Sign in to Acme

Enter your email to continue

Email address

Navigated to acme.com/signup

Browser

[ Testimonials ]

Trusted by developers and enterprises alike

Teams around the world use AgentMail to power their AI agent communications.

"AgentMail took email from the thing I worried most about to the thing I worried the least about."

Garrett ScottCEO, Pipedream Labs

"We provision 25,000 inboxes via AgentMail and handle millions of emails. AgentMail has been proven reliable, deliverable, and built for scale."

Zach SchefskaCo-Founder, CarEdge

"They handle all the hard stuff: deliverability, spam prevention, proper email headers, threading. Our emails land in inboxes, not spam folders."

Stan SedberryCEO, Generative.Inc

"It's a no brainer, agents into email. Everyone is going to be using AgentMail."

Garry TanCEO, Y Combinator

[ FAQ ]

Frequently asked
questions.

AgentMail is an API-first email platform designed specifically for building AI agents that can communicate over email. While traditional email APIs are built for sending one-way notifications, AgentMail is built for two-way conversations, making it easy to create agents that can read, understand, and reply to emails in a thread, just like a human would.

AgentMail is a separate email provider for agents, as Gmail is a provider for humans. We handle our own infrastructure and deliverability completely separate from Gmail. There is not a single line of Gmail code in our codebase.

The key difference is our focus on conversational agents. Services like SendGrid are excellent for transactional emails (receipts, password resets) and marketing campaigns. AgentMail is built for the unique challenges of allowing agents to have 2-way conversations over email, with first-class support for concepts like Threads, Inboxes, and Attachments to manage stateful conversations.

Yes, absolutely! While you can get started instantly with an @agentmail.to inbox, we highly recommend setting up your own custom domain for production use. This improves deliverability and ensures emails come from your brand.

Email deliverability is a complex topic. We provide comprehensive documentation on best practices including proper domain authentication (SPF, DKIM, DMARC), warm-up strategies, and content guidelines to maximize your inbox placement rates.

Yes, AgentMail fully supports email attachments. Your agents can send and receive files of various types, with support for common formats like PDFs, images, and documents. Size limits and supported types are detailed in our API documentation.

Yes, we offer custom enterprise plans for organizations with high-volume needs or specific requirements. Enterprise plans include dedicated support, custom SLAs, and flexible pricing. Contact our sales team to discuss your needs.