Add and update contacts with the Loops API - Loops

With the Loops API, you can easily manage contacts directly from your application or service. For example, creating a new contact is as easy as sending a POST request to https://app.loops.so/api/v1/contacts/create.

{
  "email": "test@example.com",
  "firstName": "Adam",
  "lastName": "Kaczmarek",
  "favoriteColor": "blue",
  "userGroup": "Founders",
  "source": "Signup form Service"
}

We also offer endpoints for finding, updating and deleting contacts (plus some other features like sending transactional email and sending events).

Learn more

API Reference

Find out how to send events using our API.

Last modified on May 1, 2026

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