Add conformance test for authorization server metadata #169
Description
Background
This repository contains conformance tests for MCP clients and MCP servers. However, there are currently no conformance tests for authorization servers.
It may be because conformance tests for authorization servers may have low priority, but they are necessary.
First Step
Implementing conformance tests for authorization servers involves multiple steps. Therefore, as a first step, this issue focuses on implementing a test for OAuth 2.0 Authorization Server Metadata RFC8414.