grantless_auth.py

import requests
from datetime import datetime
from requests_aws4auth import AWS4Auth

endpoint = "https://sellingpartnerapi-na.amazon.com"
TOKEN_URL = "https://sellingpartnerapi-na.amazon.com/authorization/v1/authorizationCode"
ACCESS_ID = ""
SECRET_ID = ""

if __name__ == "__main__":
    params = {
        "grant_type": "client_credentials",
        "client_id": "",
        "client_secret": "",
        "scope": "sellingpartnerapi::migration"
    }
    res = requests.post("https://api.amazon.com/auth/o2/token", params=params)
    access_token = res.json()["access_token"]
    print(f"access_token: {access_token}")

    headers = {
        "host": "sellingpartnerapi-na.amazon.com",
        "x-amz-access-token": access_token.strip(),
        "x-amz-date": datetime.now().strftime("%Y%m%dT%H%M%SZ"),
        "user-agent": "App/1.0 (Language=Python)",
        "Content-Type": "application/x-www-form-urlencoded;charset=UTF-8"
    }

    params = {
        "sellingPartnerId": "",
        "developerId": "",
        "mwsAuthToken": ""
    }
    auth = AWS4Auth(ACCESS_ID, SECRET_ID, 'us-east-1', 'execute-api')

    res = requests.get(TOKEN_URL, headers=headers, params=params, auth=auth)
    print(res.headers)
    print(res.text)