# CAST Blockcast CAST Nodes are powerful cache servers that form the backbone of the Blockcast Network, delivering content efficiently to thousands of users. * **Action**: Serve content to a large audience and provide multicast coverage * **Things you can do with CAST:** * Serve as high-capacity content caches for large-scale delivery * Provide multicast coverage to underserved areas * Balance and route network traffic efficiently * Earn (lots of) rewards for serving mid-tier CDN traffic for Blockcast Network * **How do I become a CAST node?** * CAST Nodes are strategically placed where they're needed most. You may qualify to run a CAST Node if you have: * Access to a data center or high-throughput network connection * or Coverage area with 1000+ active BEACON and RELAY nodes * or Ability to serve multiple RELAY nodes through AMT (Automatic Multicast Tunneling) * If you have access to a high throughput data connection (uplink) or sit on a multicast native network, we want to hear from you. Please fill this [interest form](https://forms.gle/MX9kawBsdKhHgqou6). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.blockcast.network/main/getting-started/how-do-i-participate-in-the-network/cast.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.