How to Use the Hanko (Passkey Auth) MCP in Cursor

Write auth-aware code in Cursor. Use the Hanko (Passkey Auth) MCP Server to test registration and login flows in real-time.

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Connect Hanko (Passkey Auth) MCP to Cursor

Create your Vinkius account to connect Hanko (Passkey Auth) to Cursor and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Hanko (Passkey Auth) with Cursor

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Claude

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Automate login flows in Cursor

Invoke `passkey_login_init` to start an authentication sequence within your project. The AI receives the necessary challenge to present to the user. Finalize the process using `passkey_login_finalize`. This allows your code to verify the login attempt instantly while you are building the UI.

Execute complex flows in Cursor

Use `flow_execute` to trigger multi-step Hanko actions. It handles the heavy lifting of state transitions so you can focus on your application logic. This tool allows the agent to drive the entire authentication lifecycle. You get immediate feedback on whether the flow succeeded or failed.

Manage transactions with Cursor

Call `passkey_transaction_init` to start a secure operation, such as a high-value action or payment. It ensures the user has authorized the specific event. Finish the request with `passkey_transaction_finalize`. Your agent can then confirm the status of the transaction in the chat history.

Setup guide

Set up Hanko (Passkey Auth) MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Hanko (Passkey Auth) MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Hanko (Passkey Auth) transactions." If the MCP tools are loaded correctly, Cursor will call the Hanko (Passkey Auth) tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "hanko-passkey-auth-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Hanko. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Hanko (Passkey Auth) MCP in Cursor

Create a .cursor/mcp.json file in your project root. Define the server there, and Cursor will load the tools into your Agent mode session.

Absolutely. The agent can write tests that call these tools, ensuring your registration and login logic works before you commit the code.

Yes, use the admin tools to list and delete credentials. It lets you reset your test environment state without leaving the editor.

It is secure because it relies on standard WebAuthn protocols. The server acts as a bridge, never storing your actual private keys.

It sees user IDs and credential metadata. All sensitive authentication data remains bound to the user's specific hardware and the Hanko platform.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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