MCP Server to Assist with Setting-up and Maintaining Better-Auth
Better Auth MCP server exists for a simple reason — assistants are far more useful when they can act on Better Auth directly instead of describing what you should do. MCP Server to Assist with Setting-up and Maintaining Better-Auth.
Clone and install: bash git clone https://github.com/better-auth-mcp-server/better-auth-mcp-server.git cd better-auth-mcp-server npm install
Installation goes through your MCP client rather than a global install: point it at @smithery/cli on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Once Better Auth is connected, these are the calls the assistant has available:
analyze_project — Analyze project structure for auth setup recommendationssetup_better_auth — Configure auth providers with project ID and API keyanalyze_current_auth — Detect existing auth.js/next-auth implementationsgenerate_migration_plan — Create step-by-step migration pathDebugging — Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the [MCPYou will need 2 environment variables: BETTER_AUTH_PROJECT_ID, BETTER_AUTH_API_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Better Auth's toolset — analyze_project, setup_better_auth, analyze_current_auth and 2 more — is a fair guide to whether it matches your workflow. It is maintained by nahmanmate; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| analyze_project | Analyze project structure for auth setup recommendations |
| setup_better_auth | Configure auth providers with project ID and API key |
| analyze_current_auth | Detect existing auth.js/next-auth implementations |
| generate_migration_plan | Create step-by-step migration path |
| Debugging | Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the [MCP Inspector](https://github.com/modelcontextprotocol/inspector), which is available as a package script: |
{
"mcpServers": {
"better-auth": {
"command": "npx",
"args": ["-y", "@smithery/cli"],
"env": {
"BETTER_AUTH_PROJECT_ID": "your-value",
"BETTER_AUTH_API_KEY": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| BETTER_AUTH_PROJECT_ID | Configuration value read at startup. | Optional |
| BETTER_AUTH_API_KEY | Credential the server authenticates with. | Yes |
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