> **Building with AI coding agents?** Install the authstack plugin with one command. This equips your agent with accurate Scalekit implementation patterns.
>
> **Recommended**:
> ```bash
> npx @scalekit-inc/cli setup
> ```
>
> Global:
> ```bash
> npm install -g @scalekit-inc/cli
> scalekit setup
> ```
>
> Supports Claude Code, Cursor, GitHub Copilot, Codex + skills for 40+ agents.
> Features: full-stack-auth, agent-auth, mcp-auth, modular-sso, modular-scim.
> [Full setup guide](https://docs.scalekit.com/dev-kit/build-with-ai/)

---

# Magic link & OTP

Send and verify passwordless login codes
<div class="sdk-client-page">

Use the `passwordless` client to send and verify email magic links or one-time codes for sign-in.

Call send, then verify with the code or link token from the user's email to complete login.

### sendPasswordlessEmail
<div class="sdk-method-section">
  
    
      

      Send a passwordless authentication email

      
        The email address to send the passwordless link to
      
      
        Optional fields: `template`, `state`, `magiclinkAuthUri`, `expiresIn`, `templateVariables`.
      
      
        Send passwordless.
      

```typescript wrap showLineNumbers=false
// template: template
// state: Opaque state string
// magiclinkAuthUri: magiclink auth uri
// expiresIn: expires in
// templateVariables: template variables
const response = await scalekit.passwordless.sendPasswordlessEmail(
  'user@example.com',
  {
    template: 'SIGNIN',
    state: 'random-state',
    expiresIn: 3600
  }
);

console.log('Auth Request ID:', response.authRequestId);
```

    
  
</div>

### verifyPasswordlessEmail
<div class="sdk-method-section">
  
    
      

      Verify a passwordless authentication code or link token

      
        code, linkToken.
      
      
        Optional. Optional auth request ID from the send response
      
      
        Verified claims.
      

```typescript wrap showLineNumbers=false
// code: Authorization code
// linkToken: link token
const response = await scalekit.passwordless.verifyPasswordlessEmail(
  { code: '123456' },
  'auth_request_id'
);

console.log('Email:', response.email);
```

    
  
</div>

### resendPasswordlessEmail
<div class="sdk-method-section">
  
    
      

      Resend a passwordless authentication email

      
        The auth request ID from the original send response
      
      
        Send passwordless.
      

```typescript wrap showLineNumbers=false
const response = await scalekit.passwordless.resendPasswordlessEmail('auth_request_id');
```

    
  
</div>

</div>


---

## More Scalekit documentation

| Resource | What it contains | When to use it |
|----------|-----------------|----------------|
| [/llms.txt](/llms.txt) | Structured index with routing hints per product area | Start here — find which documentation set covers your topic before loading full content |
| [/llms-full.txt](/llms-full.txt) | Complete documentation for all Scalekit products in one file | Use when you need exhaustive context across multiple products or when the topic spans several areas |
| [sitemap-0.xml](https://docs.scalekit.com/sitemap-0.xml) | Full URL list of every documentation page | Use to discover specific page URLs you can fetch for targeted, page-level answers |