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Connect to a Sui Network

Sui has Mainnet, Devnet, and Testnet networks available. You can use one of the test networks, Devnet or Testnet, to experiment with the version of Sui running on that network. You can also spin up a local Sui network for local development.

The Sui Testnet and Devnet networks consist of:

  • Four validator nodes operated by Mysten Labs. Clients send transactions and read requests via this endpoint: https://fullnode.<SUI-NETWORK-VERSION> using JSON-RPC.
  • A public network Sui Explorer for browsing transaction history.

You can request test SUI tokens through the Sui devnet-faucet and testnet-faucet Discord channels, depending on which version of the network you use. If connected to Localnet, use cURL to request tokens from your local faucet. The coins on these networks have no financial value. There is no faucet service for Mainnet.

See announcements about Sui in the #announcements Discord channel.

See the terms of service for using Sui networks.


Sui provides the following tools to interact with Sui networks:

Environment set up

First, Install Sui. After you install Sui, request SUI test tokens through Discord for the network you are using: Devnet or Testnet. If connected to Localnet, use cURL to request tokens from your local faucet.

To check whether Sui is already installed, run the following command:

which sui

If Sui is installed, the command returns the path to the Sui binary. If Sui is not installed, it returns sui not found.

See the Sui Releases page to view the changes in each Sui release.

Configure Sui client

If you previously ran sui genesis to create a local network, it created a Sui client configuration file (client.yaml) that connects to localhost at See Connect to a custom RPC endpoint to update the client.yaml file.

To connect the Sui client to a network, run the following command:

sui client

If you receive the sui-client help output in the console, you already have a client.yaml file. See Connect to a custom RPC endpoint to add a new environment alias or to switch the currently active network.

The first time you start Sui client without having a client.yaml file, the console displays the following message:

Config file ["<PATH-TO-FILE>/client.yaml"] doesn't exist, do you want to connect to a Sui Full node server [y/N]?

Press y and then press Enter. The process then requests the RPC server URL:

Sui Full node server URL (Defaults to Sui Devnet if not specified) :

Press Enter to connect to Sui Devnet. To use a custom RPC server, Sui Testnet, or Sui Mainnet, enter the URL to the correct RPC endpoint and then press Enter.

If you enter a URL, the process prompts for an alias for the environment:

Environment alias for [<URL-ENTERED>] :

Type an alias name and press Enter.

Select key scheme to generate keypair (0 for ed25519, 1 for secp256k1, 2 for secp256r1):

Press 0, 1, or 2 to select a key scheme and the press Enter.

Sui returns a message similar to the following (depending on the key scheme you selected) that includes the address and 12-word recovery phrase for the address:

Generated new keypair for address with scheme "ed25519" [0xb9c83a8b40d3263c9ba40d551514fbac1f8c12e98a4005a0dac072d3549c2442]
Secret Recovery Phrase : [cap wheat many line human lazy few solid bored proud speed grocery]

Connect to a custom RPC endpoint

If you previously used sui genesis with the force option (-f or --force), your client.yaml file already includes two RPC endpoints: localnet at and devnet at You can view the defined environments with the sui client envs command, and switch between them with the sui client switch command.

If you previously installed a Sui client that connected to a Sui network, or created a local network, you can modify your existing client.yaml file to change the configured RPC endpoint. The sui client commands that relate to environments read from and write to the client.yaml file.

To check currently available environment aliases, run the following command:

sui client envs

The command outputs the available environment aliases, with (active) denoting the currently active network.

localnet => (active)
devnet =>

To add a new alias for a custom RPC endpoint, run the following command. Replace values in < > with values for your installation:

sui client new-env --alias <ALIAS> --rpc <RPC-SERVER-URL>

To switch the active network, run the following command:

sui client switch --env <ALIAS>

If you encounter an issue, delete the Sui configuration directory (~/.sui/sui_config) and reinstall the latest Sui binaries.