After you've purchased a Coinbase Data Marketplace product, you need to generate an SSH public-private key pair.
To generate the key pair from your Linux or macOS:
$ ssh-keygen -t ed25519 -P "" -C "Data-Marketplace-Key" -f coinbase-marketplace-key
This creates two files:
coinbase-marketplace-key (private key file)
coinbase-marketplace-key.pub (public key file)
Only share your public key with Coinbase sales team. Additionally, only ed25519 type keys are accepted. For example, public keys starting with ssh-ed25519.
$ cat coinbase-marketplace-key.pub