---
title: "Lettr API"
account: lettr
slug: lettr-api
---

# Lettr API

Email: send transactional emails, manage templates, domains, webhooks, audiences and campaigns

- Operations: 71
- Versions: 1 (latest `48ef0dac1ebd`)
- License: [Proprietary](https://lettr.com/terms)
- Source: https://docs.lettr.com/openapi.json
- OpenAPI document: https://skmtc.dev/lettr/apis/lettr-api/revisions/48ef0dac1ebd?raw

## Operations

71 in total, by tag:

- System (2)
- Emails (8)
- Domains (5)
- Webhooks (5)
- Templates (8)
- Projects (1)
- Audience (35)
- Campaigns (7)

Every operation, with a link to its markdown: https://skmtc.dev/lettr/apis/lettr-api/llms.txt