MCP Auth Playground – Local Bridge
Bridges the hosted MCP Auth Playground to local MCP servers on localhost or Docker networks.
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The MCP Auth Playground – Local Bridge is a companion extension for the MCP Auth Playground (https://mcp-auth.playground.gravitee.io), an interactive workshop that teaches the OAuth 2.1 authorization flow used by Model Context Protocol (MCP) servers.
WHY IS THIS NEEDED?
When using the playground from the hosted URL, your browser enforces the same-origin policy, preventing direct requests to localhost, 127.0.0.1, or Docker-internal hostnames. This extension acts as a lightweight in-browser proxy to bypass that restriction.
HOW IT WORKS
1. The playground web app sends a request via window.postMessage
2. The extension's content script forwards it to the background service worker
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