Dear PayPal Team, dear developers, i am new in PayPal API but i am working with REST since some years to automate some financial and cloud backup processes. Today i had a look to an old PHP script (PHP SDk Version 53, using for getting balance and get actual incoming payments) to check if it is still working. It didnt so i suppose that this is outdated. I decided to do some fresh stuff and created a little .NET application. Getting oAuth key was working fine, request payments stuck. I got some payments, some not. After searching and searching i have read in another forum that REST API can only "see" that payments which are done by REST. My questions: a.) Am i right? REST API (list payments) show only REST payments? b.) if a is true, is there another workaround to request full list of all payments (including refunds etc.)? c.) Where do i find working examples for the "Classic" API to list ALL payments? I found this url: https://developer.paypal.com/docs/classic/api/merchant/TransactionSearch_API_Operation_NVP/ But what about endpoint? Which credentials to use? Searching a little bit more: https://developer.paypal.com/docs/classic/express-checkout/ht_searchRetrieveTransactionData-curl-etc/ "&SIGNATURE=merchant_signature" Where to find or create such signature? In my PayPal Account i see below certificate (installed some years before) a fingerprint. Is that my signature? Using that fingerprint as signature returns: TIMESTAMP => 2017-03-28T13:01:17Z CORRELATIONID => d08d30492ac48 ACK => Failure VERSION => 94 BUILD => 25237094 L_ERRORCODE0 => 10002 L_SHORTMESSAGE0 => Security error L_LONGMESSAGE0 => Security header is not valid L_SEVERITYCODE0 => Error Using endpoint: $curl = curl_init('https://api-3t.paypal.com/nvp'); Or is the certificate / signature binded to the server / ip where the certificate has been created? (Checked from origin IP but same). Searching again: https://developer.paypal.com/docs/classic/api/apiCredentials/ Signature on picture at the bottom: Line 4 "Signature" is missing in my account, but i can see username and password. Thanks in advance. Best regards from germany Boris
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