The vctool utility provides command-line features for working with the blockchain. It's basically a Swiss army knife for interacting with the blockchain. These features include, but are not limited to:

• Creating keypairs for entities.
• Extracting public certificates from keypair certificates.
• Creating a root block.
• Creating and signing transactions.
• Submitting transactions to a blockchain agent.
• Querying a blockchain agent and downloading blocks and artifact transactions.
• Displaying certificates in a human readable format.
• Verifying signed certificates and blocks.
• Verifying an entire blockchain from the root block to the latest block.