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

# Chainstack Advanced APIs: token, NFT, and decoded data

> Access Chainstack advanced APIs for high-level blockchain data queries including token balances, NFT metadata, and decoded transaction information.

Advanced APIs offer an enhanced user experience due to their extended capabilities compared with basic APIs.

Advanced APIs may include features such as authentication and authorization, WebSockets, advanced data structures and analytics, and other developer tools.