---
title: "Lettr integration"
url: "https://unified.to/integrations/lettr"
description: "Lettr API integration and MCP server via Unified.to's real-time unified API."
---
# Lettr API integration & MCP server

Connect Lettr to your application with Unified.to's real-time unified API and MCP platform. One API, data model, authorization flow, and webhook system — no per-integration code.

- **Categories:** Marketing, Messaging
- **Status:** Beta
- **Website:** https://lettr.com
- **Provider API docs:** https://docs.lettr.com/api-reference/introduction

## Supported unified data models

- MARTECH List
- MARTECH Member
- MARTECH Campaign
- MARTECH Report
- MESSAGING Message

## Links

- [Add Lettr to your app](https://app.unified.to)
- [Feature support](https://docs.unified.to/martech/integrations)
- [All integrations](https://unified.to/integrations.md)