UsageFlow

UsageFlow is an AI payment infrastructure and runtime billing platform that meters AI calls, enforces spend limits before execution, and syncs usage to Stripe. It solves the problem of unpredictable AI costs by providing pre-execution blocking and detailed billing telemetry. The platform targets developers, finance, and operations teams in B2B companies, from startups to enterprises. It is positioned as a runtime-level solution that sees inside requests, unlike traditional API gateways or post-hoc alerting tools, and offers both function-level and API-level metering.

Key features

• Function-level metering for AI calls
• API-level metering for endpoints
• Pre-execution blocking of expensive calls
• Runtime policy enforcement
• Provider-aligned billing telemetry
• Stripe integration for billing events
• Deep simulation of usage and risks
• Webhooks and custom sinks
• Supports Express, Fastify, NestJS, FastAPI, Flask, Gin