Evolving OAuth Client Registration in the Model Context Protocol

The Model Context Protocol (MCP) has adopted OAuth 2.1 as the foundation for its authorization framework. A key part of the authorization flow that MCP is particularly reliant on is client registration . This is especially important in a world where clients and servers don’t have a pre-existing relationship - we can’t assume that we will always know which MCP clients will connect to which MCP servers. This design highlights two challenges that need to be addressed: Operational issues with managing client IDs via Dynamic Client Registration (DCR) Preventing client impersonation If you’re alread