Learn how to add a product rate plan to a subscription using the REST API by creating an order.

1. Determine the values of the following variables:

   Variable	Description
   $SubscriptionNum	The number of the subscription to update. For example, A-S00000001. To create the order under a new account instead of an existing account, specify the newAccount field instead of the existingAccountNumber field.
   $AccountNum	The number of the account that will own the order. For example, A00000001 .
   $ProductRPId	The ID of the product rate plan to add to the subscription. For example, 2c92c0f9592a69410159432fab376d81 .
   $ProductRPChargeId	The ID of the product rate plan charge to use when adding the product rate plan. For example, 2c92c0f9592a6941015943308a2c6e72 .
   $Today	Today's date. For example, 2017-09-30.

2. Use the Create an order operation to create an order under an existing account:

   Request

   POST /v1/orders/

   Request Body

   { "orderDate": "$Today", "existingAccountNumber": "$AccountNum", "subscriptions": [ { "subscriptionNumber": "$SubscriptionNum", "orderActions": [ { "type": "AddProduct", "triggerDates": [ { "name": "ContractEffective", "triggerDate": "$Today" }, { "name": "ServiceActivation", "triggerDate": "$Today" }, { "name": "CustomerAcceptance", "triggerDate": "$Today" } ], "addProduct": { "productRatePlanId": "$ProductRPId", "chargeOverrides": [ { "productRatePlanChargeId": "$ProductRPChargeId", "pricing": { "recurringFlatFee": { "listPrice": 10 } } } ] } } ] } ], "processingOptions": { "runBilling": false, "collectPayment": false } }