Designing Scalable Embedded MCP Integrations for SaaS

As more SaaS companies move from experimenting with AI to building it into their products, one question keeps surfacing: how do we make this scale? It is easy to connect an AI agent to a single system and watch it work in a demo. It is much harder to run that same capability across many integrations, thousands of customers, and millions of requests, and keep it fast, affordable, and reliable the whole way.