REST API issues in sandbox

[matt-james]

I'm trying to get my solution working so that I can have customers enter their credit card and then I can reuse that card later for purchases in our platform using PayPal to process the transaction.

My issues started yesterday when I was working on running some end-to-end tests on the process.  All of this is done with sandbox endpoints, my account in sandbox mode and with sandbox API credentials.

• I was able to create a new card and save it in my vault.  I created [removed]and got the setup token back.
• When I went to use the card, I was able to get the payment token for my card, but I got a 500 error when trying to complete the purchase with no details regarding what had gone wrong.
• I found some posts saying that certain cards can get into a bad state within PayPal servers, so they recommended using a real card.  I did that, and was again able to get the setup token.  However, when I went to use it, I got the payment token, but a 403 error when trying to complete the purchase.  Again, no details to help with the nature of the error.
• Digging some more, I found the Card Testing page in the documentation, so I generated card details from there and tried those.  I got the same results as the real card.
• When looking at the API logs, I noticed that both my /v3/vault/payment-tokens and /v2/checkout/orders had the same debug ID.  Which made me wonder if it didn't like the fact that I was reusing my bearer token for all of the calls in an operation (getting the token and placing the order).  So, I made changes to get a new bearer token for each and every call - no change.
• Now, this morning, I came in to post this, but I hadn't apparently finished setting up my account.  So, I went through that process.  When I got back to the developer dashboard and tried to gather information for this post, all of my API history was gone.  And, my API credentials had changed.  I've re-run my tests this morning (with a new card created under new API credentials) and I'm still getting a 403.

Here's the body of the call that I'm making for the purchase (minus the actual token id):

{"intent":"CAPTURE","purchase_units":[{"amount":{"currency_code":"USD","value":"250.00"}}],"payment_source":{"card":{"vault_id":"XXXXXXXXXXXXX"},"stored_credential":{"payment_initiator":"MERCHANT","payment_type":"RECURRING","usage":"SUBSEQUENT"}}}

Any ideas?  Things that I may be missing based on the examples shown at https://developer.paypal.com/docs/checkout/save-payment-methods/purchase-later/payment-tokens-api/ca...  Or in my account?  It seems like my credentials and base REST mechanism are working properly, so I don't know where in the details I'm having issues.

Thanks,

Matt

[Kavyar]

Good day @matt-james 

Thank you for posting to the PayPal community.

I would suggest to please contact your website developer (or) the third party eCommerce support to cross check your using same SANDBOX/LIVE REST API Credentials(Client ID & Secret) while performing the below API calls.

https://developer.paypal.com/api/rest/authentication/

https://developer.paypal.com/api/rest/postman/ 

Important: Please note that it is important to utilize the token within 24 hours. If it is not used within this timeframe, you will need to generate a new token.

Also, If a third-party eCommerce partner is performing API operation on your behalf, you(i.e. merchant) should be on-boarded and necessary API permissions should be granted to the Partner(API Caller). 

https://developer.paypal.com/docs/multiparty/ 

https://developer.paypal.com/docs/multiparty/seller-onboarding/ 

Merchants can manually grant permission to a third-party eCommerce to access specific information in your PayPal account and perform PayPal API operations on your behalf.

Login PayPal.com >> Settings >> Account Settings >> Website payments >> API Access >> Pre-built payment solution >> Grant API permission >> contact your "Third party software eCommerce" for Third Party Permission Username >> enter the username.

Direct link -  https://www.paypal.com/cgi-bin/webscr?cmd=_profile-api-grant-authorization

                       https://developer.paypal.com/api/nvp-soap/paypal-payments-standard/admin/third-party/ 

If your still facing issues, please create an MTS ticket via -  https://www.paypal-support.com/s/?language=en_US  with the detailed information and error details.

Sincerely,

Kavya

PayPal MTS

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