A

authentication

🔧🔗https://github.com/privacyidea/privacyidea

🔐 multi factor authentication system (2FA, MFA, OTP Server)

mcp oidc provider

https://github.com/tigrisdata/mcp-oidc-provider Open-sourced mcp-oidc-provider: a minimal, vendor-neutral OIDC layer that sits between MCP clients and your upstream IdP (Auth0/Clerk/Okta).

🔧🔗https://github.com/goauthentik/authentik The authentication glue you need.

🔧🔗https://github.com/stack-auth/stack-auth Open-source Auth0/Clerk alternative