Using a Node's API

With some exceptions, NiceNode will use the standard default ports for all node API endpoints. In a node's settings, the API endpoint ports are shown and they can be changed.

Ethereum nodes

API Name	Endpoint	Test command
Http API	http://localhost:8545	curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}' http://localhost:8545
Websocket API	http://localhost:8546	linux/macOS: echo '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}' | websocat ws://localhost:8546 windows (PowerShell): '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}' | .\websocat.exe ws://localhost:8546
Beacon client API	http://localhost:5052	curl http://localhost:5052/eth/v1/node/version

Websocket commands require having Websocat installed. Downloads https://github.com/vi/websocat/releases. Or on macOS: brew install websocat

Accessing the API from another computer on the same network

Determine the local IP address of the computer running NiceNode and the nodes. On Linux, the command may print the local IP address.

Operating System(s)	Command for local IP address
Linux	hostname -I | awk '{print $1}'
macOS	ipconfig getifaddr en0
Windows (PowerShell)	(Get-NetIPAddress -AddressFamily IPv4).IPAddress
Windows (Command Prompt)	ipconfig | findstr /i "IPv4 Address" (or ipconfig and manually search)

Typically, on home networks this will look something like 192.168.0.X where X is between 0 and 255.

Next, you will need to modify the node settings to allow connections from your other computer by entering the IP Address of the computer FROM which you are accessing the node API, in a setting like in the screenshot (or from all other machines using a *). So the value for the setting would be http://localhost,192.168.125.155 or you can try * or "*" for while testing if you are not concerned about security on the NiceNode computer.

HTTP and Websockets have separate settings typically

Also, make sure that the firewall on the NiceNode computer is not blocking incomimg connections on the port of the API. ufw is a common linux firewall tool.

Lastly, in the API endpoint, just replace localhost with the IP address such as 192.168.0.110.

Accessing the API within a container

NiceNode runs containers with Podman. If you are running your container with Podman, in the endpoint, just replace localhost with host.internal.containers