Thanks for the quick reply, Greg! I read through all the documentation on the page you provided, I also successfully set up the web service and API calls such as get lead, get activity, post lead etc. work fine. actually everything works fine so far with calling the API except for What is the right endpoint/command to write activities to Marketo (via REST API) What is the right endpoint/command to write custom activities to Marketo (via REST API) GET LEAD only returns a few fields from Marketo (e.g. Lead ID, email, FName, LName) – how can I set up that Marketo returns more or all fields? how can I create a static list via that API? I just did not find the part where they explain how to create an activity in Marketo via the API. I already set up custom activities as well, I can read them (get activity) but cannot write them - what is the right call? I found the code below - that's it, nothing else so far. 😕 { "input":[ { "leadId":34, "activityDate":"2015-07-20T12:30:00-08:00", "activityTypeId":100006, "primaryAttributeValue":"SKU12345", "attributes":[ { "name": "productName", "value": "iPhone" }, { "name": "productDescription", "value": "iPhone 6s+" } ] },
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