Best authentication for Claude Code
Sign-in, SSO and user management, compared on official plugins, MCP servers and skills. Click a column to sort.
We track 4 authentication tools. 4 ship an official Claude Code plugin, 2 have an official MCP server, and 3 bundle skills that teach the agent current SDK patterns. Each score links to the plugin files or vendor docs it is based on.
| Tool ↕ | Fit ↕ | Plugin ↕ | MCP ↕ | Skills ↕ | Why |
|---|---|---|---|---|---|
| 5/5 | Yes | Yes | Yes | Vendor-published Claude Code plugin (own marketplace) bundling skills + Clerk MCP server | |
| 4/5 | Yes | No | Yes | Official Anthropic-marketplace plugin with 1 skills (no bundled MCP server) | |
| 4/5 | Yes | No | Yes | Official Anthropic-marketplace plugin with 2 skills (no bundled MCP server) | |
| 4/5 | Yes | Yes | No | Official Anthropic-marketplace plugin with MCP server (no bundled skills) |
All authentication tools
Clerk
Auth
Vendor-published Claude Code plugin (own marketplace) bundling skills + Clerk MCP server
Auth0
Auth
Official Anthropic-marketplace plugin with 1 skills (no bundled MCP server)
WorkOS
Auth
Official Anthropic-marketplace plugin with 2 skills (no bundled MCP server)
Firebase
Auth
Official Anthropic-marketplace plugin with MCP server (no bundled skills)
No tools match those filters.
Authentication comparisons
Clerk vs Auth0 for Claude Code
Clerk vs WorkOS for Claude Code
Auth0 vs WorkOS for Claude Code
Clerk vs Firebase for Claude Code
Setup guides
Frequently asked questions
Based on official integrations, the highest-rated auth options right now are Clerk (5/5). Scores reflect Claude Code support only, not overall product quality.