How to Use the Hanko (Passkey Auth) MCP in Claude Code

Q: How do I install the Hanko (Passkey Auth) server in Claude Code?

Run the command claude mcp add --transport http hanko-passkey-auth-mcp -- in your terminal. This registers the server in your local configuration so you can start querying endpoints immediately.

Q: How do I debug WebAuthn registration issues using Hanko (Passkey Auth) and Claude Code?

Ask Claude Code to run passkeyregistrationinit with your test user parameters. It will output the raw cryptographic challenge options, letting you verify that your server configuration matches WebAuthn requirements.

Q: Can I manage Hanko flows from the command line?

Yes. You can use the flowexecute tool within Claude Code to run specific authentication flow actions, making it easy to test custom redirect and login logic.

Manage Hanko passkey configurations and user sessions directly from your terminal using Claude Code.

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Connect Hanko (Passkey Auth) MCP to Claude Code

Create your Vinkius account to connect Hanko (Passkey Auth) to Claude Code 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 Claude Code

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Validate Hanko Sessions via Claude Code

This Hanko (Passkey Auth) MCP Server lets you verify active user sessions straight from your terminal. Claude Code calls `public_validate_session` with a raw token to check its expiration and signature. You can pipe session tokens from your application logs directly into Claude Code. The CLI client checks them against `public_get_jwks` and returns the validation status without you opening a browser or a GUI debugger.

Audit Hanko Credentials from the CLI

This MCP Server exposes admin tools to inspect your authentication database. Claude Code uses `admin_list_users` to output a list of registered profiles directly to your shell. When troubleshooting a locked-out user, you can instruct Claude Code to run `admin_list_user_credentials` to see their registered WebAuthn keys. You can immediately remove invalid authenticators using `passkey_delete_credential`.

Configure Passkey Transactions via CLI

This MCP Server enables command-line testing of step-up authentication. Claude Code initializes high-security actions by calling `passkey_transaction_init` to generate a transaction challenge. It displays the challenge options in your terminal so you can verify the payload structure. Once signed, it sends the response to `passkey_transaction_finalize` to confirm the transaction works before you deploy to production.

Setup guide

Set up Hanko (Passkey Auth) MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see hanko-passkey-auth-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Hanko (Passkey Auth) transactions." It will automatically discover and invoke the available Hanko (Passkey Auth) tools.

Terminal

claude mcp add --transport http hanko-passkey-auth-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Hanko (Passkey Auth) MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "hanko-passkey-auth-mcp": {
      "type": "url",
      "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 Claude Code

Run the command `claude mcp add --transport http hanko-passkey-auth-mcp -- ` in your terminal. This registers the server in your local configuration so you can start querying endpoints immediately.

Yes, you can pipe token strings from your shell scripts directly into Claude Code. The CLI client uses `public_validate_session` to verify the token and outputs the status code.

Ask Claude Code to run `passkey_registration_init` with your test user parameters. It will output the raw cryptographic challenge options, letting you verify that your server configuration matches WebAuthn requirements.

Yes. You can use the `flow_execute` tool within Claude Code to run specific authentication flow actions, making it easy to test custom redirect and login logic.

No, Claude Code does not store or log your session tokens or passkey credentials. All cryptographic exchanges occur over HTTPS directly to the Hanko API, and the transient data only exists in your terminal's local memory during execution.

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