MCP Auth That Actually Works: OAuth for Remote Servers

In the first post I showed what an AI does with 118 MCP tools. In the second I showed how we organized them. Both posts assumed a working connection. This one covers the hardest part: getting that connection to work securely. Most MCP servers run locally. You add a JSON block to your Claude config, paste an API key, and you're done. That works for developer tools. It doesn't work for a SaaS product where users have teams, roles, and data they share with other people. We needed something differen