How to use:

Postman CURL
curl --location --request GET 'http://localhost:9022/api/get/pdf' \
--header 'Content-Type: application/json' \
--header 'Cookie: frontend_lang=en_US;
session_id=088f8e1e566273d9af1fa14621088b36aeccaf45' \
--data = {
            "jsonrpc": "2.0",
            "params":
            {
                  "id": 91,
                  "model_name": "sale.order",
                  "report_name":"Quotation / Order"
            }
}

Postman:

Can be Convert to pdf easily with base64 decode method can also be tested with online tool to convert base64 to pdf