---
title: Authentication
slug: yh4J-authentication
description: Learn how to access the API by providing a valid API key in the Authorization header. Find out how to obtain API keys and why it is beneficial to create separate keys for different applications. This document includes a sample curl command to easily verif
createdAt: 2023-09-28T14:55:48.575Z
---

The API uses Authorization header to authenticate users. A valid API key is required for all requests.

### Obtaining an API Key

An V2 API key can be obtained by contacting a Sales representative **sales\@successeve.com**. Each app has its own set of API keys. We recommend creating a separate API key for each application that will be making calls on your behalf

## Verify your token

```curl
curl -X GET https://data.successeve.com/v2/contacts \
-H 'Accept: application/json' \
-H 'Authorization:Bearer {Your access token}'
```