Pythonを用いたVertex Tax RESTful API連携ステップバイステップガイド

import requests

# 認証トークンを取得する URL
auth_url = 'https://auth.vertexsmb.com/identity/connect/token'

# クライアント認証情報
client_id = 'your_client_id'
client_secret = 'your_client_secret'

# トークンリクエストのデータ
data = {
    'grant_type': 'client_credentials',
    'client_id': client_id,
    'client_secret': client_secret,
}

# ヘッダー
headers = {
    'Content-Type': 'application/x-www-form-urlencoded'
}

# トークンを取得するためのリクエストを送信
response = requests.post(auth_url, data=data, headers=headers)

if response.status_code == 200:
    token = response.json().get('access_token')
    print(f"Access Token: {token}")
else:
    print("Authentication failed:", response.text)
 

# 税金計算の URL（バージョン 2）
api_url = 'https://calcconnect.vertexsmb.com/vertex-ws/v2/supplies'

# アクセストークンを含むヘッダーを設定
headers = {
    'Authorization': f'Bearer {token}',
    'Content-Type': 'application/json',
}

# 税金計算のサンプルペイロード
payload = {
    "saleMessageType": "QUOTATION",
    "transactionType": "SALE",
    "transactionId": "998822",
    "originalCurrency": {
        "isoCurrencyCodeAlpha": "USD"
    },
    "currency": {
        "isoCurrencyCodeAlpha": "USD"
    },
    "customer": {
        "administrativeDestination": {
            "city": "Joe Vu",
            "country": "US",
            "mainDivision": "MO",
            "postalCode": "65049",
            "streetAddress1": ""
        },
        "customerCode": {
            "classCode": "TAX",
            "value": "GUEST"
        },
        "destination": {
            "city": "Lake Ozark",
            "country": "US",
            "mainDivision": "MO",
            "postalCode": "65049",
            "streetAddress1": ""
        },
        "isTaxExempt": "false"
    },
    "documentDate": "2024-09-04",
    "documentNumber": "3065",
    "lineItems": [
        {
            "lineItemNumber": "0",
            "product": {
                "value": "Stuff:Concrete"
            },
            "quantity": {
                "unitOfMeasure": "UOM",
                "value": 13
            },
            "discount": {
                "discountType": "DiscountAmount",
                "discountValue": "-0"
            },
            "unitPrice": "212.343",
            "vendorSKU": None
        }
    ],
    "discount": {
        "discountType": "DiscountAmount",
        "discountValue": 0,
        "userDefinedDiscountCode": "string"
    }
}

# POST リクエストを行う
response = requests.post(api_url, json=payload, headers=headers)

if response.status_code == 200:
    tax_info = response.json()
    print("Tax Calculation Result:", tax_info)
else:
    print("Error in API call:", response.text)