I have a website which is subscriptions going on through _xclick-subscriptions which i believe is Express Checkout method . We have built a form which is submitted at paypal server and after payment the user is redirected back to website. The form has other data posted as below <input id="pay_cmd" type="hidden" name="cmd" value="_xclick-subscriptions"> <input id="id_a3" type="hidden" name="a3" value="99.00"> <input id="id_p3" type="hidden" name="p3" value="1"> <input id="id_t3" type="hidden" name="t3" value="Y"> <input type="hidden" name="currency_code" value="USD"> 1. I want to know what is this above service called? 2. Is it possible to move these type of subscriptions to newer and advanced services of paypal without affecting existing users ? 3. I am able to make the `ManageRecurringPaymentsProfileStatus` work But the endpoint `GetRecurringPaymentsProfileDetails` doesnt work. Is this not supported by the service which we are using ? Error - TIMESTAMP=XXXXXXX&CORRELATIONID=XXXXXXX&ACK=Failure&VERSION=51.0&BUILD=XXXXXXX&L_ERRORCODE0=10002&L_SHORTMESSAGE0=Security error&L_LONGMESSAGE0=Security header is not valid&L_SEVERITYCODE0=Error Request - METHOD=GetRecurringPaymentsProfileDetails&VERSION=51.0&PWD=XXXXXXXX&USER=XXXXXXX&SIGNATURE=XXXXXXXX&PROFILEID=I-XXXXXXX I am using same PHP code for both requests with only slight necessary changes. 4. Which is the most advanced methods of creating subscriptions (monthly, quarterly,Yearly and lifetime) for SAAS products. I want to know the name of the services and documentation links. @PayPal_Frank Please help me in understanding this. I saw some of your replies on other posts.
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