How to Connect to zkSync

Learn how to connect to your zkSync nodes using Blockdaemon via cURL or WebSockets.

In this guide, you'll learn the following methods of connection to the zkSync infrastructure:



Visit the zkSync marketplace page to explore Blockdaemon’s Aptos infrastructure.

How to Access Your Blockdaemon zkSync Credentials

Once you have purchased your Blockdaemon zkSync infrastructure, you can access your credentials:

  1. Log into the Blockdaemon app.
  2. Click Nodes under the Access menu.
  3. Select the zkSync node.
  4. Select the Connect tab. You'll find the following information:
    1. Endpoint URL
    2. Auth String
    3. Auth Token



Please reach out to [email protected] or your Customer Success Manager for support.

zkSync RPC connection via cURL

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

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": "YOUR_RPC_METHOD", "params": [YOUR_PARAMS] }'
  • Replace YOUR_NODE_URL with the node URL in the Blockdaemon app.
  • Replace YOUR_AUTH_TOKEN with the Auth Token in the Blockdaemon app.
  • Replace YOUR_RPC_METHOD with your chosen RPC method.

  • Replace YOUR_PARAMS with your selected RPC parameters.

zkSync Connection 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



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 or our support page for any issues, bugs, or assistance you may need.