What is a Money API?
A money API is a programmatic interface that gives software direct access to financial operations — sending payments, checking balances, managing accounts, and executing transactions — treating money as a first-class software primitive.
WHY IT MATTERS
The concept of a 'money API' captures the vision of programmable money. Just as a file system API lets software read and write files, a money API lets software send and receive payments, query balances, and manage financial state.
Stablecoins on blockchain are the closest thing to a true money API. Any program that can call a smart contract can send USDC — no bank partnership, no payment processor, no compliance middleware. The blockchain IS the money API.
For AI agents, money APIs are the gateway to financial autonomy. An agent with access to a money API can execute the full range of financial operations programmatically — from simple payments to complex DeFi strategies.
HOW POLICYLAYER USES THIS
PolicyLayer is the policy layer for money APIs used by AI agents. When agents have programmatic access to financial operations, PolicyLayer ensures every operation complies with human-defined rules — adding governance to the money API.