Sync open source content 🐝 (from cb161e50aa4903899c3c1d10f2d7cca5b592a291)

Author: beezythebot

docs/sdks/customize/authentication/oauth.mdx

@@ -216,7 +216,7 @@ components:
 
 <Callout type="warning" title="Limited Support">
   Currently, `x-speakeasy-token-endpoint-additional-properties` are only
-  supported in our primary targets: Go, TypeScript and Python.
+  supported in Go, TypeScript, Python, and standalone MCP servers.
 </Callout>
 
 ### Example OpenAPI configuration