https://wapi.dev/
WAPI - Digital Wallet & Ledger API for B2B Platforms
digital walletledger apiwapiplatforms
https://bookkeeper.apache.org/docs/next/api/ledger-adv-api/
The Advanced Ledger API | Apache BookKeeper
In release 4.5.0, Apache BookKeeper introduces a few advanced API for advanced usage.
ledger apiadvancedapachebookkeeper