> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unomiq.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Unomiq Engine API reference documentation

## Welcome

The Engine API allows you to query, filter, and analyze OpenTelemetry traces with associated usage and cost, computed based on billing data.

## Authentication

All API endpoints require authentication via JWT token in the Authorization header:

```
Authorization: Bearer <your_jwt_token>
```

Obtain your token from the [OAuth API](/api-reference/oauth/introduction) using:

* API key and secret with `read:traces` permission
* `grant_type` = `client_credentials`
* `audience` = `https://api.unomiq.com`.

All requests also require the `X-Unomiq-App-Id` header to identify your application.

## Base URL

`https://engine-api.unomiq.com`

All endpoints are relative to the base URL.