Re: How to access VISA API through Postman for a study assignment where I need to create API automat

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kamalmehta
Regular Visitor

How to access VISA API through Postman for a study assignment where I need to create API automation.

Hi Community,

Thanks in Advance.

I need to access any two API's GET and POST of visa through Postman and need to create API automation using Java library like HTTP or rest assured. 

I am not sure if I can directly access the API's through Postman and consume it with any sample data. I am new to the visa developer community. Please suggest how can I access any API and create an automation test on that API.

 

Regards,

Kamal

 

 

3 REPLIES 3
API_Products
Visa Developer Support Specialist

Re: How to access VISA API through Postman for a study assignment where I need to create API automat

Hey @kamalmehta,

 

Postman is an API development and testing solution that allows developers to quickly create and execute RESTful API functional tests. Here's the user guide for Postman – https://developer.visa.com/pages/working-with-visa-apis/two-way-ssl#testing_twoway_ssl_connectivity_... 
 

To get started with your Visa Developer application project, please refer to the "Working with Visa APIs" link below to develop a Visa Developer application. https://developer.visa.com/pages/working-with-visa-apis 

 

The "Working With Visa APIs" guide provides the primary steps on how to create an application, credentials, and connection validation. After you're finished testing your App in sandbox, submit a production request and your Application will get evaluated. If you have other questions, please reach out to us and someone will be happy to help. 




Thanks,

Tee



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kamalmehta
Regular Visitor

Re: How to access VISA API through Postman for a study assignment where I need to create API automat

Hi Team,

 

Thanks for the help. I followed the solution and I am able to make one Post call "https://sandbox.api.visa.com/forexrates/v1/foreignexchangerates" but when I am trying to make a get call I am getting error although I added correct cert file and key file in certificates. Also in basic auth provided correct credentials.

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API_Products
Visa Developer Support Specialist

Re: How to access VISA API through Postman for a study assignment where I need to create API automat

Hey @kamalmehta,

 

For error cause and resolution please go to this page or refer to below - https://developer.visa.com/pages/visa-developer-error-codes 

AuthN Error Codes

HTTP STATUS HTTP CODE CAUSE/RESOLUTION
UNAUTHORIZED 401

Depending on the authentication/encryption mechanism being used, this could be due any of the following reasons. If you are unable to root-cause the same from the possible reasons below, please contact Visa Support at developer@visa.com with the details of the error message, and full http request, response details.

Two-Way SSL (Mutual Authentication):

  • Authorization Header missing in the request.
  • Authorization Header in invalid format. It either does not start with 'Basic' or the userId or password fields are blank.
  • UserId or Password or Subject DN on the certificate is invalid.
  • You could be presenting a wrong client certificate for that environment.

X-Pay Token:

  • x-pay-token is blank or not in valid format.
  • Timestamp field not in valid UTC timestamp format.
  • Version field is invalid.
  • Token's timestamp is more than 8 minutes off from the current time.
  • Token hash mismatch.
  • APIKey not present in request.
  • APIKey is not active.
  • APIKey not valid.
  • APIKey not active.
  • The request contains an older version of x-pay-token than supported by the API/project. Please upgrade to the latest supported version. Consult the VDP Getting Started Guide for the same.

JWE: 

  • JWE Token format is invalid.
  • Kid not present in the token.
  • Token validation against Shared secret failed.
  • JWT Grant Type or Token value is either missing, empty or has multiple values.

JWS:

  • JWS token validation failed.
  • Kid extraction from header failed.
  •  JWT Grant Type or Token value is either missing, empty or has multiple values.
  • Kid missing in JWS header.

JWS/JWE:

  • JWT prefix not in proper format.
  • JWT in Request Body not a well-formed JSON.
  • JWT does not contain grant type field or grant type field is blank.
  • JWT does not contain assertions field or assertions field is blank.
  • JWT token value does not start with the appropriate bearer_JWT prefix.
  • APIKey is not active.
  • APIKey not valid.
  • APIKey not active.

This could be due to any of the following scenarios in Message Level Encryption (JWE):

  • KeyId in request is invalid.
  • KeyId not present in the request (JWE Header/Request Header).
  • JWE payload element in request is not in the proper format.
  • JWE token does not have iat header or token has expired.

General:

  • Request has more than one authentication tokens which is not supported.
  • Incoming http request does not contain any of the required authentication tokens for this API.
 

 




Thanks,

Tee



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