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.Connect your agents to FRAGMENT over MCP and use AI to design your schema.
Featured
MCP
Accounts
assets
├cash
└receivables
└user
└order
liabilities
└payables
├restaurant
│ ├order
│ └payout
└driver
└order
income
└platform_fee
Handbook
Guides
How it works
Model
Your product as a double entry chart of accounts.fund_transfer
| Account | Amount |
|---|---|
| assets/bank/checking | {{amount}} |
| liabilities/payable/vendor | {{vendor_pay}} |
| income/service-revenue | {{revenue}} |
Add+
user_payment
| Account | Amount |
|---|---|
| assets/receivables/user | {{pay_amount}} |
| liabilities/escrow/hold | {{pay_amount}} |
| assets/cash/operating | {{fee}} |
Add+
vendor_payout
| Account | Amount |
|---|---|
| expense/payouts/vendor | {{payout}} |
| assets/cash/operating | {{payout}} |
| expense/fees/processing | {{proc_fee}} |
Add+
Write
Ledger entries for every event in your funds flow.TypeScript↓
| 1 | await fragment.addLedgerEntry({ |
| 2 | ik: "some-ik", |
| 3 | ledgerIk: "your-ledger-ik", |
| 4 | type: "user_funds_account", |
| 5 | parameters: { |
| 6 | user_id: "user-1", |
| 7 | funding_amount: "10000", |
| 8 | }, |
| 9 | }); |
Read
Balances directly from FRAGMENT.getBalance()
Available
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mutation AddLedgerEntry($ik: SafeString!, $entry: LedgerEntryInput!) {
addLedgerEntry(ik: $ik, entry: $entry) {
... on AddLedgerEntryResult {
entry {
created
posted
}
lines {
amount
}
}
... on Error {
code
message
}
}
}