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Payment operations API for companies moving money at scale
Modern Treasury is a payment operations platform that provides APIs and software for companies that move significant volumes of money as part of their business model — marketplaces, lending platforms, payroll providers, insurance companies, and financial services companies that process payments on behalf of others. The platform connects to banks via direct API integration, enabling programmatic payment initiation, status tracking, and reconciliation without screen-scraping or batch file workflows. The ledger API provides a real-time accounting layer that maintains accurate balance positions for every account, counterparty, and transaction — enabling real-time financial reporting for complex multi-party payment flows. Payment orchestration supports ACH, wire, RTP (real-time payments), international wires, and check, with configurable routing logic that selects the optimal payment rail for each transaction based on speed, cost, and risk parameters. The reconciliation engine automatically matches payments to expected transactions, handling the complex multi-bank, multi-rail reconciliation that would otherwise require significant manual accounting effort. Counterparty management tracks entity verification, bank account validation, and beneficial ownership documentation for payment compliance. Modern Treasury's developer-first design philosophy — comprehensive documentation, sandboxed testing, and explicit error handling — is ideal for fintech engineering teams building payment infrastructure. For companies embedding financial services or processing B2B payments at scale, Modern Treasury's banking connectivity and ledger layer eliminate months of custom infrastructure development.