# Introduction

This *legacy* Scoring API has a different API key and authentication than the new API, please refer to the right article

## Requests

* All requests should be made using *https\://*.
* All response bodies, including errors are encoded in JSON.

We have official language bindings in:

* [Node.js](https://github.com/MadKudu/madkudu-node)

## Rate Limiting

You can make up to 600 requests per endpoint per minute. Once you reach that limit, you will start receiving errors (HTTP code 429).