---
updatedAt: 2026-05-13T16:16:01.000Z
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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.

# How to Connect to zkSync

## How to Access zkSync Credentials

> 📘 Info
>
> If you haven't configured a node, learn how to deploy one [here](https://docs.blockdaemon.com/docs/how-to-deploy-a-node).

1. Log into the [Blockdaemon app](https://app.blockdaemon.com/).
2. Select **Nodes & RPC** from the sidebar menu
3. Go to the **My Nodes** tab and select the **zkSync** node you want to connect to.
4. Under the **Connect** tab, you’ll find:
   1. Endpoint URL
   2. Auth String
   3. Auth Token

> Please reach out to <support@blockdaemon.com> or your Customer Success Manager for support.

***

## 1. How to Connect via cURL

Use cURL to establish a zkSync RPC connection with the following command:

```curl
curl -X POST \
https://<YOUR_NODE_URL> \
-H "Content-Type: application/json" \
-H 'X-Auth-Token: <YOUR_AUTH_TOKEN>' \
-d '{"jsonrpc":"2.0", "id":2, "method": "RPC_METHOD", "params": [METHOD_PARAMS] }'
```

* Replace `YOUR_NODE_URL` with the node URL in the [Blockdaemon app](https://app.blockdaemon.com/signin/register).
* Replace `YOUR_AUTH_TOKEN` with the Auth Token in the [Blockdaemon app](https://app.blockdaemon.com/signin/register).
* Replace `RPC_METHOD` with your chosen [RPC method](https://docs.blockdaemon.com/docs/zksync-rpc-methods).
* Replace `METHOD_PARAMS` with params of your chosen method.

***

## 2. How to Connect via WebSocket

Add your access credentials to a WebSocket connection request:

```
wscat -H "X-Auth-Token: YOUR_AUTH_TOKEN" -c wss://YOUR_ENDPOINT_URL:8443/websocket
```

* Replace `YOUR_AUTH_TOKEN` with the Auth Token in the [Blockdaemon app](https://app.blockdaemon.com/signin/register).
* Replace `YOUR_NODE_URL` with the node URL in the [Blockdaemon app](https://app.blockdaemon.com/signin/register).

> 📘 Info
>
> **wscat** is a tool that can connect over WebSocket(s) and may need to be installed. You can use your preferred tool of choice.

## 👋 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.