FRAGMENT
Make money work.
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FRAGMENT gives your coding agent financial superpowers. Use it to automate your customers' billing, payments, and accounting.
Card Pay-in
Amounts
Members
Refunds
Users
Amounts
Members
Refunds
Users
Amounts
Members
Refunds
Card Pay-in
*
Card Pay-in
More about Payment Accounts →
The control plane for your financial code.
Schemas
Wire Pay-in
Merchants
Wire
3 Entries
USD
ACH Pay-out
Vendors,Partners
ACH
2 Entries
EUR
Payment
Card Pay-in
Customers,Guests
Card
2 Entries
USD
ACH Pay-in
Employees
ACH
4 Entries
USD
Wire Pay-out
Suppliers
Wire
2 Entries
GBP
Model your payment flows as a double-entry ledger.
MCP
Payment
*
Card Pay-in
Customers,Guests
Card
2 Entries
USD
Let agents read and write payments through MCP.
Scenarios
Scenarios
Refund
Card Pay-in
Authorize
Reverse
ACH Pay-out
Payout
Queue
ACH Pay-out
Settle
Transfer
Lock
Wire Pay-out
Wire Pay-in
Reconcile
Simulate payment flows before you deploy them.
Conditions
+200
assets/cash
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Authorize transactions directly from the ledger.
Typesafe SDKs
fragment.PostMakeDriverPayout(payout_amount: 1000, driver_id: abcd1234)
Generate an SDK from your schema, so config and code never drift.
Double Entry
Entry
Card Auth
assets/cash
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liabilities/payable
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income/sales
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expense/fees
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Every transfer balanced. Every balance correct.
Customers

“FRAGMENT helps our agents navigate complex money flows. Agents propose and test payment flows, investigate anomalies, and run reconciliation and close workflows against it.”

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“FRAGMENT is the control plane for our coding agents. The agent decides what to do. FRAGMENT decides what's allowed.”

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“The thing that would’ve taken a year or two at Square took a month at Basic Capital. Engineering velocity is a huge unlock that’s directly attributable to FRAGMENT.”

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Blog
Payment Accounts
Payment Accounts
Accounts
assets
├cash
└receivables
└user
└order
liabilities
└payables
├restaurant
│ ├order
│ └payout
└driver
└order
income
└platform_fee
The FRAGMENT MCP
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9
Building Balances II: High-throughput writes
Money is Multiplayer
Money is Multiplayer
Changelog
Jul
FRAGMENT MCP Server
Jun
Roles & Permissions
May
Small Improvements
Apr
Strongly Consistent Parent Balances
Mar
Line Tags
Feb
Repeated Entry Lines

our money on autopilot.*

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 FRAGMENT  
2026
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