FRAGMENT is a toolkit for building products that move and track money. It includes an API and Dashboard for designing, implementing, and operating your Ledger.
Documentation
mutation AddLedgerEntry($ik: SafeString!, $entry: LedgerEntryInput!) {
  addLedgerEntry(ik: $ik, entry: $entry) {
    ... on AddLedgerEntryResult {
      entry {
        created
        posted
      }
      lines {
        amount
      }
    }
    ... on Error {
      code
      message
    }
  }
}
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