Should you build or buy an MCP runtime for enterprise AI agents in 2026? (opens in new tab)

The engineering bottleneck for enterprise AI has shifted. Your team has built agents. They work in single-user environments on LangChain or Mastra. The wall hits when you try to wire those agents into secure enterprise systems for thousands of employees without creating new security exposure or a permanent maintenance load. In 2026, engineering directors face a real architectural decision, and it isn't whether to write custom Model Context Protocol (MCP) servers. Custom MCP servers are how yo...