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

# API Overview

> REST API for accessing Hadron pool data, midprice history, volume, swaps, transactions, fees, and protocol metrics.

## Base URL

```
https://api.hadron.fi
```

## Authentication

Pass an optional API key via the `x-api-key` header to unlock higher rate limits.

| Tier         | Rate Limit          | Identifier |
| ------------ | ------------------- | ---------- |
| No API key   | 10 req/min          | IP address |
| With API key | Default 120 req/min | API key    |

<Info>
  Contact the Hadron team to request an API key for production integrations.
</Info>