# How to retrieve data from the Whysor API

# Whysor API - Device & Sensor Data

## Overview

This document describes how to retrieve devices, sensors, and sensor measurements using the Whysor API.

The API allows users to:

- Retrieve devices they have access to
- Retrieve sensors belonging to devices
- Read the latest sensor values
- Read historical sensor measurements

All API requests require authentication.

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# Authentication

All requests require an authorization header.

Example:

```http
Authorization: <token>
Content-Type: application/json