Brex is built on an intelligent finance platform that combines a native API, thousands of two-way ERP integrations, and an AI layer for automating expense approvals, GL coding, and invoice processing globally. The platform supports real-time budget tracking, live spend controls, automated receipt capture, and AI-generated accounting suggestions. Brex's banking infrastructure is backed by Column N.A. (FDIC) and Brex Treasury LLC (a Capital One company), enabling same-hour liquidity and up to $6M in FDIC insurance via program banks. Developers and finance teams can leverage Brex's open API for custom integrations and automation workflows.