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Neo Node Introduction

Nodes that store all of the blockchain are called “full-nodes”. They are connected to the blockchain through a P2P network. All the nodes in the blockchain network are equal, they act both as a client interface and as a server.

There are two full-node programs:

  • Neo-CLI, which provides a command-line interface and a set of RPC API for developers. It also helps other nodes achieve consensus with the network and is involved in generating new blocks.
  • Neo-GUI, which provides a graphical interface for ordinary users and developers, with most functions except consensus.

Download links#

Source codeGitHubGitHub

Neo-GUI and Neo-CLI comparison#

Graphic interface
Command line interface   ✔  
Query blocks/transactions/assets
Create wallet
Open wallet✔  ✔ 
Import/Export key pair✔  ✔  
Import mnemonics into wallet✔   
Upgrade wallet file ✔  
Show all key pairs
Show all addresses
Show all assets
Claim GAS
Create address
Create multi-party signed address✔  
Generate multiple addresses
Change wallet password
Delete address
Query contract
Deploy contract
Invoke contract
Register to candidate✔  
Custom transaction construction
Data conversion
Participate in blockchain consensus

NEO-CLI security policy#

To enable an external program to access the node API, you need to open the firewall port.


To avoid the significant security risk, a whitelist or firewall must be used to block external server requests.

Neo-CLI does not provide the function to remotely switching on/off the wallet, and it does not verify the process when opening a wallet. Therefore, you should set your own security policies. The wallet must be kept open all the time to respond to the withdrawal requests of users. For security reasons, the wallets should be run in an independent server on which the firewall is configured properly, as shown below.

Main NetTest Net
JSON-RPC via HTTPS1033120331
JSON-RPC via HTTP1033220332
P2P via TCP1033320333
P2P via WebSocket1033420334