> ## 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 updates: December 30, 2021

> Avalanche X-Chain and C-Chain mainnet and Fuji testnet support, Tezos Hangzhounet, a public API for AVAX/Fantom/Tezos nodes, and a flash loan tutorial.

* **Protocols**.
  * Avalanche support. You can now deploy full and archive Avalanche nodes with X-Chain and C-Chain endpoints on mainnet and Fuji testnet.
  * Tezos Hangzhounet testnet support. The Florencenet testnet support is deprecated.
* **Documentation**. Avalanche general description, operations, flash loan tutorial.
* **Public API**. You can now use the Chainstack API to manage your Avalanche, Fantom, and Tezos nodes.
* **Billing**. Removed free usage period on the Developer plan. The Developer plan keeps other usage features, including the free 3M requests.