<!-- ZenPays documentation · https://docs.zenpayz.com/docs/rest-api/endpoints/customers/create-customer -->

# Create Customer

Create a new customer record for tracking payments and transactions.

<EndpointHeader verb="POST" path="/merchant/api/v1/customers" />

## Request

### Headers

<ParamTable
  label="Header"
  rows={[
    { name: "Authorization", required: true, desc: "`Bearer {api_key}`" },
    { name: "X-Signature", required: true, desc: "HMAC-SHA256 signature" },
    { name: "X-Timestamp", required: true, desc: "ISO 8601 timestamp" },
    { name: "X-Secret-Salt", required: true, desc: "Secret salt for HMAC validation" },
    { name: "Content-Type", required: true, desc: "`application/json`" },
  ]}
/>

### Body Parameters

<ParamTable
  rows={[
    { name: "email", type: "string", required: true, desc: "Customer email address" },
    { name: "phone", type: "string", desc: "Phone number (10-15 characters)" },
    { name: "firstName", type: "string", desc: "Customer first name (1-100 characters)" },
    { name: "lastName", type: "string", desc: "Customer last name (1-100 characters)" },
    { name: "dateOfBirth", type: "string", desc: "Date of birth (YYYY-MM-DD)" },
    { name: "country", type: "string", required: true, desc: "ISO country code" },
    { name: "ipAddress", type: "string", required: true, desc: "Customer IPv4 address" },
    { name: "deviceFingerprint", type: "string", desc: "Device fingerprint for fraud detection (10-255 characters)" },
    { name: "userAgent", type: "string", desc: "Browser user agent string (1-500 characters)" },
    { name: "metadata", type: "object", desc: "Custom key-value pairs" },
  ]}
/>

## Response

### Success (201 Created)

```json
{
  "success": true,
  "data": {
    "customerId": "cust_a1b2c3d4e5f6g7h8",
    "email": "john@example.com",
    "phone": "+1234567890",
    "firstName": "John",
    "lastName": "Doe",
    "country": "US",
    "status": "active",
    "riskLevel": "low",
    "createdAt": "2024-01-15T10:30:00.000Z",
    "updatedAt": "2024-01-15T10:30:00.000Z"
  },
  "message": "Customer created successfully",
  "error": null,
  "meta": {
    "request_id": "req_xxxxx",
    "timestamp": "2024-01-15T10:30:00.000Z",
    "processing_time_ms": 120,
    "api_version": "v1",
    "endpoint": "POST /customers",
    "user_type": "merchant"
  }
}
```

### Error Responses

<ErrorTable
  rows={[
    { code: "VALIDATION_ERROR", status: "400", message: "Invalid request parameters" },
    { code: "UNAUTHORIZED", status: "401", message: "Invalid API key" },
    { code: "DUPLICATE_CUSTOMER", status: "409", message: "Customer with email already exists" },
  ]}
/>

<CodeRail>

## Examples

<Tabs groupId="language">
  <TabItem value="curl" label="cURL" default>

```bash
curl -X POST https://api.zenpayz.com/merchant/api/v1/customers \
  -H "Authorization: Bearer zp_test_xxxxx" \
  -H "X-Timestamp: 2024-01-15T10:30:00.000Z" \
  -H "X-Signature: a1b2c3d4e5f6..." \
  -H "X-Secret-Salt: your_secret_salt" \
  -H "Content-Type: application/json" \
  -d '{
    "email": "john@example.com",
    "firstName": "John",
    "lastName": "Doe",
    "phone": "+1234567890",
    "country": "US",
    "ipAddress": "203.0.113.42"
  }'
```

  </TabItem>
  <TabItem value="javascript" label="JavaScript">

```javascript
const response = await fetch('https://api.zenpayz.com/merchant/api/v1/customers', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${apiKey}`,
    'X-Timestamp': timestamp,
    'X-Signature': signature,
    'X-Secret-Salt': secretSalt,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    email: 'john@example.com',
    firstName: 'John',
    lastName: 'Doe',
    phone: '+1234567890',
    country: 'US',
    ipAddress: '203.0.113.42',
  }),
});

const result = await response.json();
console.log(result.data.customerId); // cust_a1b2c3d4e5f6g7h8
```

  </TabItem>
  <TabItem value="sdk" label="SDK">

```javascript
const customer = await zenpays.customers.create({
  email: 'john@example.com',
  firstName: 'John',
  lastName: 'Doe',
  phone: '+1234567890',
  country: 'US',
  ipAddress: '203.0.113.42',
});

console.log(customer.customerId); // cust_a1b2c3d4e5f6g7h8
```

  </TabItem>
</Tabs>

</CodeRail>

## Related Endpoints

- [Get Customer](/docs/rest-api/endpoints/customers/get-customer)
- [List Customers](/docs/rest-api/endpoints/customers/list-customers)
- [Update Customer](/docs/rest-api/endpoints/customers/update-customer)
