xpensePayments for AI agents

A TypeScript SDK to give agents money — spending limits, budgets, approval, and audited Payment Intents.

Payment Intents

Build, validate, and track structured Payment Intents through a typed lifecycle. Money is exact end to end — decimal strings at the boundary, bigint for all arithmetic.

Governance

Per-currency budget engine with spending limits, approval thresholds, and revoke. The gate runs before settlement so an agent can never spend past its policy.

Settlement on X Layer

Submit intents through a typed gateway, with gas abstraction so agents pay in stablecoins without holding native gas.

Pay-on-402

Wrap fetch and react to HTTP 402 — agents settle metered API calls inline, no bespoke billing integration required.