---
title: "Blog"
canonical: "https://fragment.dev/blog"
---

# Blog

Source: https://fragment.dev/blog

[Documentation index](https://fragment.dev/llms.txt)

<a id="blog"></a>

<a id="posts"></a>

## Posts

- [A ledger for engineers](https://fragment.dev/blog/a-ledger-for-engineers.md)
- [Building Balances II: High-throughput writes](https://fragment.dev/blog/building-balances-high-throughput-writes.md)
- [Building Balances I: Low-latency reads](https://fragment.dev/blog/building-balances-low-latency-reads.md)
- [Clearing Accounts](https://fragment.dev/blog/clearing-accounts.md)
- [Database transactions stop at the payment API](https://fragment.dev/blog/external-payment-boundary.md)
- [Financial correctness starts at the write](https://fragment.dev/blog/financial-enforcement-and-ownership.md)
- [From financial intent to recoverable execution](https://fragment.dev/blog/financial-intent-and-execution.md)
- [The Fragment MCP](https://fragment.dev/blog/fragment-mcp.md)
- [Fragment vs. Postgres: financial correctness](https://fragment.dev/blog/fragment-vs-postgres.md)
- [Recover a refund without issuing it twice](https://fragment.dev/blog/lost-refund-response.md)
- [Money is Multiplayer](https://fragment.dev/blog/money-is-multiplayer.md)
- [Payments that account for themselves](https://fragment.dev/blog/native-payment-accounting.md)
- [Obj.01 NYC Metrocard](https://fragment.dev/blog/object-01-nyc-metrocard.md)
- [Obj.02 The Golden Record](https://fragment.dev/blog/object-02-the-golden-record.md)
- [Our new free plan](https://fragment.dev/blog/our-new-free-plan.md)
- [Pair-Programming a Wallet on Fragment](https://fragment.dev/blog/pair-programming-wallet-fragment.md)
- [Payment Accounts](https://fragment.dev/blog/payment-accounts.md)
- [When your ledger should live outside Postgres](https://fragment.dev/blog/postgres-and-financial-state.md)
- [From a $1,000 payment to $600 in revenue](https://fragment.dev/blog/prepaid-payment-lifecycle.md)
- [Recover payments without paying twice](https://fragment.dev/blog/recovering-uncertain-payments.md)
- [Scaling Fragment](https://fragment.dev/blog/under-the-hood.md)

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## Customer stories

- [Whop: The back office behind the world’s largest API-first business platform](https://fragment.dev/customers/whop.md)
- [Ramp: How Ramp ships better travel faster](https://fragment.dev/customers/ramp.md)
- [Pleo: Delivering multi-currency Cash Management at scale](https://fragment.dev/customers/pleo.md)
- [Odyssey: Lowering the barrier to a high quality education](https://fragment.dev/customers/odyssey.md)
- [Basic Capital: The system behind the world's most powerful retirement system](https://fragment.dev/customers/basic-capital.md)
- [AtoB: America's next fuel card and payments system](https://fragment.dev/customers/atob.md)
- [Nomos: Powering the API for energy](https://fragment.dev/customers/nomos.md)