> ## Documentation Index
> Fetch the complete documentation index at: https://developer.z-api.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Register PIN code

> Register a security PIN code on the WhatsApp account

## Overview

Method used to register a security PIN code on your WhatsApp account.

<Info>
  This API is only available for mobile instances.
</Info>

***

## Attributes

### Header

<ParamField path="instanceId" type="string" required>
  Your instance ID. Available in the Z-API panel under **Instances**.
</ParamField>

<ParamField path="token" type="string" required>
  Your Z-API instance token.
</ParamField>

### Body

<ParamField body="code" type="string" required>
  PIN code to be registered
</ParamField>

***

## Request Body

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "code": "123456"
}
```

***

## Response

### 200

<ResponseField name="success" type="boolean">
  Returns true if the PIN code was registered successfully
</ResponseField>

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "success": true
}
```

### 400

Invalid request. Check if the data you are sending matches the documentation.

### 405

Make sure you are correctly sending the method specification, that is, verify that you sent POST or GET as specified at the beginning of this topic.

### 415

If you receive a 415 error, make sure to add the "Content-Type" header to your request, which in most cases is "application/json".