PayPal Invoicing API - VALIDATION_ERROR - paypal

Question

I am developing an application that communicates with PayPal's API to create invoices.
This is my Request Body:
{
"detail": {
"currency_code": "USD",
"note": "Thank you for using my services!"
},
"invoicer": {
"name": {
"given_name": "Shreyas",
"surname": "Ayyengar"
},
"email_address": "{email}",
"website": "{website}"
},
"primary_recipients": [
{
"billing_info": {
"email_address": "{client_email}"
}
}
],
"items": [
{
"name": "{invoice_name}",
"description": "{invoice_description}",
"quantity": "1",
"unit_amount": {
"currency_code": "USD",
"value": "{invoice_amount}"
},
"tax": {
"name": "PayPal Service Tax",
"percent": "7.25"
}
}
],
"configuration": {
"partial_payment": {
"allow_partial_payment": false
},
"allow_tip": true
}
}
While there are placeholders like: {client_email}, I can guarantee that they are replacing properly and as expected.
However I'm thrown a VALIDATION_ERROR which I am not able to understand: {"name":"VALIDATION_ERROR","message":"Invalid request - see details.","information_link":"https://developer.paypal.com/docs/api/invoicing/#errors","details":[{"field":"merchant_info","issue":"cannot be null."},{"field":"items[0].unit_price","issue":"null"}]}
From what I can minimally understand, this error says that I have missing information like Items[].unit_price and merchant_info however I have no idea where this is supposed to be in my Request Body. I am following the direct documentationhere but I cannot see anything that mentions unit_price or merchant_info.

Answer 1

Submit your request to the correct API endpoint, https://api-m.sandbox.paypal.com/v2/invoicing/invoices
Note the major version number. See the Invoicing API reference for details.