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

# Authentication

## Getting Access

You can view your API quotas and request rate limits on the “[Account](https://i.threatbook.io/account)” page.

ThreatBook CTI now uses a single unified API key for all users. With this key, you can access different sets of APIs based on your subscription level:

* [**IP Report API**](/api-reference/enrichment/ip-report-v1)\
  Available to all users by default, with 50 free requests per day.

* **Premium APIs**\
  Includes endpoints such as [**Compromise Detection**](/api-reference/enrichment/compromise-detection-v1), [**IP Intelligence**](/api-reference/enrichment/ip-intelligence-v1), [**Domain Intelligence**](/api-reference/enrichment/domain-intelligence-v1), [**File Intelligence**](/api-reference/enrichment/file-intelligence-v2) and [**URL Intelligence**](/api-reference/enrichment/url-intelligence-v2).
  These require a premium subscription. If you’ve purchased Premium, your existing key will grant access.

* **Feeds APIs** \
  Feeds subscribers can use the same API key to access the specific data packages included in their subscription, such as [**IP Reputation**](/api-reference/feeds/ip-reputation) or [**IOC feeds**](/api-reference/feeds/ioc).

If you have any questions or wish to upgrade, please contact us at [contactus@threatbook.io](mailto:contactus@threatbook.io).

## API key

Your API key is a unique identifier for authenticating requests.

You can obtain and manage your key from the “[My API](https://i.threatbook.io/my-api)” page.

This key supports all available API types according to your subscription.

## Access IP

Please bind your access IP to the key and check whether you have the authority quotas to access the specific API before you interact with it.