Build email agents on Replit

AgentMail is the fastest way to give a Replit agent its own email inbox. Your agent gets its own inbox, can send and receive email, and polls for replies.

AgentMail is live on Replit as an official connector

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[ Install ]

One command

AgentMail is a Replit connector. Connect it from the Integrations tab, paste your API key, and Replit generates the email tools for your project.

Configure (credentials, email channel, verification)

[ Why email ]

Why your Replit agent needs its own inbox

AgentMail is the first email provider built for AI agents.

No SMTP config required

Replit projects often use shared IPs that are rate-limited by email providers. AgentMail has its own dedicated infrastructure - your agent emails land in inboxes, not spam.

No wiring code

Replit uses Mastra, a TypeScript agent framework, to read the AgentMail API and generate a complete tool set for your project: list inboxes, create inbox, send message, reply to message, and the rest.

Fork a working agent

The AI SDR example at replit.com/@bbnoy/AI-SDR-Agent-AgentMail sends cold email from a dedicated inbox, watches for replies, classifies intent, auto-responds in thread, and CCs you when someone is interested. Fork it and add your key.

[ Code ]

Working code

[ Builder ]

Looking for inspiration?

Jam with our agent builder. Describe what you want and it gives you a working template in seconds, with the exact instructions to hand your agent.

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[ FAQ ]

FAQ

Common questions about AgentMail and Replit.

Go to your project Integrations tab, find AgentMail, click Connect, and paste your API key from the AgentMail console. That is the entire setup. Replit then uses Mastra to read the AgentMail API and generate the tool set for your project, so there is no wiring code to write. Setup details are at agentmail.to/docs/integrations/replit.

Replit generates Mastra tools directly from the AgentMail API, including list inboxes, create inbox, send message, and reply to message. Your agent calls them like any other tool. You can still use the SDK directly if you would rather write the calls yourself.

Yes. The AI SDR agent at replit.com/@bbnoy/AI-SDR-Agent-AgentMail sends cold emails from a dedicated AgentMail inbox, watches for replies, classifies intent, auto-responds in thread, and CCs you when someone is interested. Fork it and add your own API key.

Replit's built-in email tools are for sending notifications from the platform, not for building agents with their own email identity. AgentMail gives your agent a real inbox it owns and can read from.

Yes. Every Replit project gets a public URL. Point your AgentMail webhook at your Replit app URL and it will receive incoming email events in real time.

Yes. Both the Python and Node.js SDKs work on Replit. Install with npm install agentmail and use the same AGENTMAIL_API_KEY secret.

Gmail API requires OAuth and was built for human accounts, not programmatic agent use. SendGrid handles sending only - no receiving, no threading, no reply parsing. AgentMail gives your Replit agent a dedicated inbox it can create on demand, send from, receive on, and read - with full thread context and no credential sharing.