How to place an order using Magento2 API?

Question

I am looking for the complete "happy path" to place an order using Magento2's REST API. So far these are all the steps I have followed. What else am I missing?

1. Create a user: [POST] /rest/V1/customers

2. Log In (create a token): [POST] /rest/V1/integration/customer/token

3. Get Product Categories for navigation: [GET] /rest/V1/categories

4. Get Products:

   4.1 Get Category Products: [GET] /rest/V1/categories/{category_id}/products

   4.2 Or search for a product: [GET] /rest/V1/products

5. Create a cart: [POST] /rest/V1/carts/mine

6. Add items to cart: [POST] /rest/V1/carts/mine/items

7. Get cart payment information [GET] /rest/V1/carts/mine/payment-information

8. ...

What other things do I have to do to place the order?

Answer 1

1. create empty cart url : http://www.xxxxxx.com/rest/V1/carts/mine call: post response: cartID eg: 4290

2. Add item to the cart url : http://www.xxxxxx.com/rest/V1/carts/mine/items body:

   {"cartItem":{
     "sku":"JFCO00017","qty":1,"name":"Devil May Cry III 3 Dante           Cosplay           Costume","price":81.55,"product_type":"simple","quote_id":"4290","product_option":{"extension_attributes":{"custom_options":[{"option_id":"thumbnail","option_value":"\/d\/e\/devilmaycryiii3dantecosplay_1_.jpg"},{"option_id":"color_2","option_value":"Red"},{"option_id":"google_size","option_value":"xxs"}]}}}
   }
   

3. Add billling info url : http://www.xxxxxx.com/rest/V1/carts/mine/billing-address body:

   {
   "address": {
   "city": "noida",
   "company": "iprag",
   "countryId": "IN",
   "email": "[email protected]",
   "firstname": "Manish",
   "lastname": "Kumar",
   "postcode": "201301",
   "region": "UP",
   "saveInAddressBook": 1,
   "street": ["D-84"],
   "telephone": "8802xxxx90"
   },
   "useForShipping": true
   }
   

4. get shipping-methods url : http://www.xxxxxx.com/rest/V1/carts/mine/shipping-methods

   {
   "carrier_code": "flatrate",
   "method_code": "flatrate",
   "carrier_title": "Flat Rate",
   "method_title": "Fixed",
   "amount": 10,
   "base_amount": 10,
   "available": true,
   "error_message": "",
   "price_excl_tax": 10,
   "price_incl_tax": 10
   

   }

5. add shipping info url : http://www.xxxxxx.com/rest/V1/carts/mine/shipping-information body:

   {
    "addressInformation": {
    "billingAddress": {
       "city": "noida",
       "company": "iprag",
       "email": "[email protected]",
       "firstname": "Manish",
       "lastname": "Kumar",
       "postcode": "335001",
       "region": "UP",
       "street": ["D-84"],
       "telephone": "9413433217"
   },
   "shippingAddress": {
       "city": "noida",
       "company": "iprag",
       "email": "[email protected]",
       "firstname": "Manish",
       "lastname": "Kumar",
       "postcode": "335001",
       "region": "UP",
       "street": ["D-84"],
       "telephone": "9413433217"
     },
      "shippingCarrierCode": "flatrate",
     "shippingMethodCode": "flatrate"
   }
   }
   

response: payment method and cart detail

5. Order place URL : http://www.xxxxxx.com/rest/V1/carts/mine/order body :

   {
    "paymentMethod":{"method":"checkmo"},
    "shippingMethod":
       {
         "method_code":"flatrate",
   
         "carrier_code":"flatrate",
         "additionalProperties":{}
   
       }
   
   }
   

response: orderid