---
title: "Lettr integration | Growf"
description: "Lettr is an email and messaging platform for transactional delivery, templates, audiences, campaigns, domains, and webhooks. Connect Lettr to Growf."
url: "https://www.growf.io/integrations/lettr/"
language: "en"
---

Integration / Marketing

![Lettr logo](https://logos.composio.dev/api/lettr)

# Lettr integration

Lettr is an email and messaging platform for transactional delivery, templates, audiences, campaigns, domains, and webhooks.

[Get a demo](https://www.growf.io/demo/)

About Lettr

## Lettr is an email and messaging platform for transactional delivery, templates, audiences, campaigns, domains, and webhooks. Use it to send reliable product emails and manage customer messaging from one place.

[All integrations](https://www.growf.io/integrations/)

Category

Marketing

Connection

API key

Type

Tool

Actions

817

Tags

library

Example prompts

## What you can ask Growf to do with Lettr

- “Create password reset email template”

- “List recent campaign delivery status”

- “Add webhook for bounced emails”

Available actions

## 817 actions your agents can run in Lettr

- Attach Contacts to Lists  
Attach every combination of 1-1000 contacts and 1-50 audience lists, processing up to 50,000 contact-list pairs and reporting new and existing memberships.
- Bulk Create Audience Contacts  
Create or recognize up to 1000 normalized, deduplicated contacts. Shared properties affect only newly created contacts; list\_id applies to all contacts, including those that already exist.
- Cancel Scheduled Email  
Cancel a scheduled email before its delivery time; cancellation is unavailable once processing has begun.
- Create Audience Contact  
Create one audience contact with optional properties and list membership.
- Create Audience Contact With Double Opt-In  
Create an unverified audience contact and irreversibly send an external confirmation email; the contact becomes subscribed only after confirming.
- Create Audience List  
Create a uniquely named audience list for grouping contacts.
- Create Audience Property  
Define a custom contact property with an immutable name and value type. Changing either later requires deleting and recreating the property.
- Create Audience Segment  
Create a dynamic audience segment whose condition groups are ANDed while conditions inside each group are ORed.
- Create Audience Topic  
Create a public or private subscription topic with an immutable opt-in or opt-out default.
- Create Domain  
Register a sending domain and return the DNS configuration needed to verify it.
- Create Template  
Create and publish an email template from either custom HTML or Topol editor JSON, extracting its merge tags.
- Create Webhook  
Create an active event webhook using no authentication, HTTP Basic credentials, or OAuth 2 client credentials.

Show all 60 actions

## Put Lettr to work inside Growf.

Connect it once and every workspace, agent and workflow can use it — securely, with your team in the loop.

[Get a demo](https://www.growf.io/demo/)