> ## 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.

# Unlimited Node add-on

> Enable the Unlimited Node add-on to convert any existing Chainstack RPC node into a flat-fee endpoint with predictable monthly costs and capped capacity.

See [Unlimited Node](/docs/unlimited-node) for full description.