> ## Documentation Index
> Fetch the complete documentation index at: https://nuggets.life/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# MCP Authentication
> Model Context Protocol authentication integration. Add secure identity verification to MCP servers using OIDC with QR code authentication flows.
See an example of Nuggets authentication within an MCP server.
If you're running an MCP server and want to add secure, verifiable authentication
to your chat, Nuggets makes this easy using **OpenID Connect (OIDC)**.
With Nuggets, users authenticate by scanning a QR code with their mobile app, proving specific attributes (e.g. identity, role, age) using Verifiable Credentials. This brings strong identity into the chat experience—without relying on usernames or passwords.
#### How to Integrated Nuggets into My MCP Server
To get started, create an **OIDC Application Client** in the Nuggets Account Portal. Here you will receive:
* A **Client ID**
* A **private key** for signing requests
* The ability to configure **redirect URIs** and **verifications**
Once set up, your MCP server simply:
1. **Generates an OIDC authentication request**
2. **Displays a QR code** in the chat UI
3. **Waits for the callback** to receive the `id_token`
4. **Verifies the token**, extracts the claims, and authenticates the user in chat
Here’s what makes it powerful:
* Strong identity based on Verifiable Credentials
* Seamless UX with QR-based login
* Custom claims in the token (like `did`, `role`, or other verified attributes)
Make sure to securely store the private key.
If you're already running OIDC flows in your backend, this plugs in with minimal changes. And if not, Nuggets provides everything you need to get started securely.