There are several ways for customers to make purchases, In this post, we will show you the easiest way to create a customer account using Magento 2 API. Follow our step by step guides to create a simple customer using Postman.
Step 1: Generate Access Token
First, to create a customer account, admin authorization is required. Complete the following steps to authorize access to resources:
In the POST request enter your store URL along with this endpoint.
POST <host>/rest/V1/integration/admin/token
Enter your Magento admin username and password in Body sections, then click Send

{
  "username": "string",
  "password": "string"
}
Step 2: Create a Customer Account
Create a new request using this endpoint:
POST <host>/rest/<store_code>/V1/customers
In Authorization section:
- Choose Type: Bearer Token
 - Then paste your token
 
Use the following code sample in the Body section to create your account. A real email address is recommended to receive all notifications.
{
  "customer": {
    "email": "julielawson@example.com",
    "firstname": "Julie",
    "lastname": "Lawson",
    "addresses": [
      {
        "defaultShipping": true,
        "defaultBilling": true,
        "firstname": "Julie",
        "lastname": "Lawson",
        "region": {
          "regionCode": "NV",
          "region": "Nevada",
          "regionId": 39
        },
        "postcode": "89406",
        "street": [
          "3703 Wescam Court"
        ],
        "city": "Fallon",
        "telephone": "860-212-5597",
        "countryId": "US"
      }
    ]
  },
  "password": "Password42"
}

RESPONSE
Magento assigned this user id value of 35.
{
    "id": 35,
    "group_id": 1,
    "default_billing": "9",
    "default_shipping": "9",
    "created_at": "2020-09-28 07:57:39",
    "updated_at": "2020-09-28 07:57:40",
    "created_in": "Default Store View",
    "email": "julielawson@example.com",
    "firstname": "Julie",
    "lastname": "Lawson",
    "store_id": 1,
    "website_id": 1,
    "addresses": [
        {
            "id": 9,
            "customer_id": 35,
            "region": {
                "region_code": "NV",
                "region": "Nevada",
                "region_id": 39
            },
            "region_id": 39,
            "country_id": "US",
            "street": [
                "3703 Wescam Court"
            ],
            "telephone": "860-212-5597",
            "postcode": "89406",
            "city": "Fallon",
            "firstname": "Julie",
            "lastname": "Lawson",
            "default_shipping": true,
            "default_billing": true
        }
    ],
    "disable_auto_group_change": 0,
    "extension_attributes": {
        "is_subscribed": false
    }
}

Step 3: Verify the Result
- Log in to your website using the email julielawson@example.com and password Password42.
 - Click the account name (Julie) in the upper right corner then select My Account.
 - Check the default billing and shipping addresses.
 

To conclude, I have shown you the complete steps to create a customer account using Magento 2 API. Learn more about Magento 2 REST API here. Also, should you have any questions let me know in the comment below.