Agent Commerce Gateway

Agent Commerce Gateway is an AI developer tool that adds a monetization and payment layer to existing APIs so AI agents can discover, request, and pay for capabilities without a backend rewrite. It sits in front of your current API and turns it into an agent-accessible paid service while you keep control of pricing, backend logic, and where funds settle. The gateway speaks several agent protocols through one commerce layer: native HTTP, MCP (Model Context Protocol), and experimental A2A and ACP channels, so you absorb new standards in a single integration instead of rebuilding each time. Every paid call runs through eight discrete steps — validate, price, authorize, verify, protect, settle, execute, receipt — which keeps payment and delivery separate and makes failure states explicit: payment rejected, replay blocked, settlement uncertain, paid-but-undelivered, or successfully delivered. An agent-commerce doctor command checks configuration, backend connectivity, protocols, and storage before any paid traffic flows. The gateway is non-custodial — it never holds your money or your keys, and settlement destinations stay merchant-controlled. For teams on BestAIFor comparing ways to charge AI agents for API access, it is an open-source (Apache-2.0) option aimed at API operators rather than a hosted billing service.

Monetizing existing APIs for AI agents — pricing, authorizing, and settling paid agent calls over HTTP and MCP without a backend rewrite.