How to Use the Hanko (Passkey Auth) MCP in Mastra AI

Q: How do I handle failed login attempts using Hanko (Passkey Auth) in Mastra AI?

Configure a Mastra AI workflow that catches errors from passkeyloginfinalize. If a login fails, the workflow can automatically trigger a fallback branch, or use admingetuser to check if the Hanko account has been suspended.

Q: Can I require human approval before deleting credentials in Hanko (Passkey Auth) with Mastra AI?

Yes, you can set requireToolApproval on the Mastra AI agent before it calls passkeydeletecredential. This halts the workflow and alerts an administrator, who must manually approve the Hanko key deletion before the workflow resumes.

Q: How does Hanko (Passkey Auth) handle transaction security inside Mastra AI?

The Mastra AI agent uses passkeytransactioninit to lock down critical workflow steps. The workflow waits for a secure WebAuthn assertion, which is then verified via passkeytransactionfinalize before any sensitive database writes occur.

Q: How do I sync external user databases with Hanko using this MCP Server?

Use adminlistusers to export your Hanko directory periodically. Your Mastra AI agent uses the MCP Server to compare this list against your primary database and trigger admincreateuser for any missing records.

Q: How does Mastra AI secure Hanko (Passkey Auth) session data?

Session validation via publicvalidatesession happens entirely in memory during the workflow execution. Mastra AI never persists these session tokens or cryptographic challenges, keeping your user's auth state isolated and secure.

Build automated, self-healing auth workflows by connecting Hanko (Passkey Auth) MCP tools to Mastra AI agents.

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Automated transaction confirmation workflows

The `passkey_transaction_init` tool requests a high-security cryptographic signature for sensitive operations like wire transfers or password changes. Mastra AI workflows trigger this challenge automatically when a user attempts a high-value action, pausing the execution branch until the Hanko signature is provided. If the user ignores the prompt, the Mastra AI workflow's retry logic kicks in to send a reminder. Once the browser returns the credential, the Mastra agent calls `passkey_transaction_finalize` to verify the signature and resume the automated workflow.

Conditional branching for user sign-ups

The `admin_create_user` tool registers new accounts programmatically during automated onboarding pipelines. Mastra AI uses this tool to provision a Hanko profile immediately after a user signs a contract or pays a subscription fee. When registration fails due to duplicate emails, the Mastra workflow catches the error and branches to `admin_list_users` to find the existing account. The Mastra agent can then automatically link the new signup to the old Hanko profile without crashing the deployment.

Self-healing credential audits via Mastra AI MCP Server

The `admin_list_user_credentials` tool retrieves all active WebAuthn keys for a specific Hanko user ID. Your Mastra agent runs this check on a cron schedule to find Hanko accounts that lack registered passkeys. If an account is vulnerable, the Mastra agent branches to trigger a recovery flow. It uses `flow_execute` to initialize a secure migration path, sending the user a personalized Hanko setup link to register their first biometric key.

Setup guide

Set up Hanko (Passkey Auth) MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Hanko (Passkey Auth) tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "hanko-passkey-auth-mcp-client",
  servers: {
    "hanko-passkey-auth-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Hanko (Passkey Auth) Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Hanko (Passkey Auth) tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Hanko (Passkey Auth) transactions"
);
console.log(result.text);

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Common questions about Hanko (Passkey Auth) MCP in Mastra AI

Configure a Mastra AI workflow that catches errors from `passkey_login_finalize`. If a login fails, the workflow can automatically trigger a fallback branch, or use `admin_get_user` to check if the Hanko account has been suspended.

Yes, you can set `requireToolApproval` on the Mastra AI agent before it calls `passkey_delete_credential`. This halts the workflow and alerts an administrator, who must manually approve the Hanko key deletion before the workflow resumes.

The Mastra AI agent uses `passkey_transaction_init` to lock down critical workflow steps. The workflow waits for a secure WebAuthn assertion, which is then verified via `passkey_transaction_finalize` before any sensitive database writes occur.

Use `admin_list_users` to export your Hanko directory periodically. Your Mastra AI agent uses the MCP Server to compare this list against your primary database and trigger `admin_create_user` for any missing records.

Session validation via `public_validate_session` happens entirely in memory during the workflow execution. Mastra AI never persists these session tokens or cryptographic challenges, keeping your user's auth state isolated and secure.

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