Developer Builds Open-Source AI Agent Storefront Using MCP and FastAPI

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A developer has published a detailed guide on DEV Community explaining how to build an AI-agent-facing e-commerce gateway called MCP Collector. The system uses FastAPI, FastMCP 2.x, and Google Cloud Run to let autonomous AI shopping agents — such as ChatGPT Shopping, Google Gemini, and Perplexity — discover product catalogs and execute purchases via structured tools. A five-layer discovery strategy, including llms.txt files, AI-targeted robots.txt rules, and Schema.org JSON-LD microdata, helps AI agents automatically find and interact with the server. When an agent reserves a product or requests a quote, the lead is persisted to a database and pushed in real time to an operator dashboard via WebSockets. The project reflects a broader shift in online commerce where autonomous agents, rather than human browsers, are increasingly driving product discovery and transactions.

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