# Introduction
# Introduction

Footprint offers a rich set of APIs to interact with the users that have onboarded onto your product.

Our API has predictable resource-oriented URLs. It generally accepts JSON-encoded request bodies and returns JSON-encoded responses. The API uses standard HTTP response codes, authentication, and verbs.

You can use the Footprint API in sandbox mode, which doesn't affect your live data, incur costs, or interact with production identity verification vendors. The API key that you use to [authenticate](#authentication) determines whether the request is made in sandbox mode or live mode.

The Footprint API may differ for each account as we release new versions and tailor functionality. Please log in to view the documentation specific to your account.

```bash filename="Base URL"
https://api.onefootprint.com
```