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

# API Overview

> Centure API for prompt injection detection

## Welcome

The Centure API provides endpoints to screen text and images for prompt injection attacks. All endpoints return detailed categorization and confidence levels for detected threats.

<Card title="OpenAPI Specification" icon="code" href="https://api.centure.ai/openapi.json">
  View the OpenAPI specification file
</Card>

## Authentication

All API endpoints require authentication using Bearer tokens. Include your API key in the Authorization header:

```
Authorization: Bearer YOUR_API_KEY
```

## Base URL

```
https://api.centure.ai
```

## Rate Limits

Maximum request size: **250,000 characters**. Requests exceeding this limit return a `413 Payload Too Large` error.