For AI agents: visit https://api-docs.omnisend.com/llms.txt for an index of all pages formatted in Markdown and endpoints in OpenAPI.
These docs are for v5. Click to read the latest docs for v2026-03-15.
- Obtain OAuth credentials by providing information described in the following documentation.
- Once you receive the credentials you can use them to authenticate and use v5 API.
- To be added to Omnisend's AppMarket, fill the TypeForm form.
- Omnisend will create the app, app integration guide in Omnisend's documentation, publish the app to the App Market and get back to you.
- When the app is published, users can connect to it via Omnisend's App Market.