Hey @akashshaha_257,
The Visa Merchant Screening Service (VMSS) typically uses Mutual TLS (mTLS) for authentication. However, some Visa APIs do support X-Pay-Token for authentication. To determine if VMSS supports X-Pay-Token, you should refer to the official documentation for VMSS on the Visa Developer Portal.
Steps to Verify Authentication Support
1. Review API Documentation:
- Check the VMSS API documentation on the Visa Developer Portal to see if X-Pay-Token is listed as a supported authentication method.
Example Authentication Code for X-Pay-Token
If VMSS does support X-Pay-Token, ensure that your request headers and token generation are correct.
Here’s a general example of how to use X-Pay-Token:
```python
import time
import hmac
import hashlib
import base64
import requests
# START
def generate_x_pay_token(resource_path, query_string, request_body, shared_secret, api_key):
timestamp = str(int(time.time() * 1000))
pre_hash_string = timestamp + resource_path + query_string + request_body
hash_bytes = hmac.new(bytes(shared_secret, 'utf-8'), bytes(pre_hash_string, 'utf-8'), hashlib.sha256).digest()
hash_string = base64.b64encode(hash_bytes).decode('utf-8')
x_pay_token = 'xv2:' + timestamp + ':' + hash_string
return x_pay_token
# Example usage
resource_path = '/vmss/v1/someEndpoint'
query_string = 'apikey=your_api_key'
request_body = '{"field": "value"}' # Adjust according to the actual request body
shared_secret = 'your_shared_secret'
api_key = 'your_api_key'
x_pay_token = generate_x_pay_token(resource_path, query_string, request_body, shared_secret, api_key)
headers = {
'Content-Type': 'application/json',
'x-pay-token': x_pay_token
}
url = f'https://sandbox.api.visa.com{resource_path}?{query_string}'
response = requests.post(url, headers=headers, data=request_body)
print(response.status_code)
print(response.json())
# END
```
1. Check Documentation: Verify if VMSS supports X-Pay-Token by reviewing the official documentation.
2. Contact Support: Reach out to Visa Developer Support for confirmation.
3. Use Correct Authentication: If supported, ensure your X-Pay-Token generation and request headers are correctly implemented.
By following these steps, you can confirm the appropriate authentication method and troubleshoot any issues with consuming the VMSS API.
Thanks,
Diana
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