Build email agents on Replit

PostNuvia 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.

PostNuvia is live on Replit as an official connector

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[ Install ]

One command

PostNuvia 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

PostNuvia 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. PostNuvia 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 PostNuvia 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-PostNuvia 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 PostNuvia and Replit.

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

Replit generates Mastra tools directly from the PostNuvia 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-PostNuvia sends cold emails from a dedicated PostNuvia 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. PostNuvia gives your agent a real inbox it owns and can read from.

Yes. Every Replit project gets a public URL. Point your PostNuvia 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 postnuvia and use the same POSTNUVIA_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. PostNuvia 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.