Methods, systems, and apparatus, including computer programs encoded on computer storage media, for obtaining blockchain information. One of the methods includes: receiving a user input in a command line interface (CLI), wherein the user input comprises a reference to one or more configurations and a reference to a blockchain; determining, by a command manager based on the user input, a blockchain-related operation and a command plug-in associated with the blockchain-related operation; generating, by the determined command plug-in, a command based on the determined operation and the one or more configurations; identifying a software development kit (SDK) associated with the referenced blockchain from a plurality of SDKs respectively associated with the plurality of blockchains; obtaining, by the identified SDK from one or more blockchain nodes associated with the referenced blockchain, information on the referenced blockchain that corresponds to the command; and providing the obtained information for display in the CLI.