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updatedAt: 2026-05-13T16:15:47.000Z
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Fetch the complete documentation index at: https://docs.blockdaemon.com/llms.txt. Use this file to discover all available pages before exploring further. Append .md to any documentation page URL to get its markdown version.

# WebSocket Support for Nodes

WebSocket allows websites to update content without waiting for the user. Unlike other techniques that piggyback on the HTTP protocol, the WebSocket protocol creates an ongoing connection between the user and the web service, allowing information to flow easily between both endpoints.

We provide access to our data API using a standard HTTP API or WebSockets connection. You can use the **auth token** or **bearer token** in the header for the WebSocket endpoint.

## WebSocket-Supported Protocols

* [Base](https://docs.blockdaemon.com/docs/how-to-connect-to-base#how-to-connect-to-base-via-websocket)
* [BNB](https://docs.blockdaemon.com/docs/how-to-connect-to-bnb#bnb-connection-via-websocket)
* [Cardano](https://docs.blockdaemon.com/docs/how-to-connect-to-cardano#2-how-to-connect-via-websocket)
* [Cosmos](https://docs.blockdaemon.com/docs/how-to-connect-to-cosmos#how-to-connect-to-cosmos-via-websocket)
* [Ethereum](https://docs.blockdaemon.com/docs/how-to-connect-to-ethereum#how-to-connect-to-ethereum-via-websocket)
* [Flare](https://docs.blockdaemon.com/docs/how-to-connect-to-flare#flare-connection-via-websocket)
* [Kusama](https://docs.blockdaemon.com/docs/how-to-connect-to-kusama#how-to-connect-to-kusama-via-websocket)
* [Polkadot](https://docs.blockdaemon.com/docs/how-to-connect-to-polkadot#how-to-connect-to-polkadot-via-websocket)
* [Polygon](https://docs.blockdaemon.com/docs/how-to-connect-to-polygon#how-to-connect-to-polygon-via-websocket)
* [Solana](https://docs.blockdaemon.com/docs/how-to-connect-to-solana#solana-connection-via-websocket)
* [Unichain](https://docs.blockdaemon.com/docs/how-to-connect-to-unichain#how-to-connect-to-unichain-via-websocket)
* [X Layer](https://docs.blockdaemon.com/docs/xlayer)
* [zkSync](https://docs.blockdaemon.com/docs/how-to-connect-to-zksync#zksync-connection-via-websocket)

## 👋 Need Help?

Contact us through [email](mailto:support@blockdaemon.com) or our [support page](https://www.blockdaemon.com/support) for any issues, bugs, or assistance you may need.