Update API.md

API.md

@@ -158,6 +158,10 @@ Special properties of `request`:
 --------------------------------
 
 ```js
+req.getSiteCapability(pkg)          // Promises a capability on behalf of the current site (req.experienceId) without exposing secrets
+
+req.webhookParser(pkg, req, opts)   // Allows the use of potentially dangerous parsers (i.e. urlencoded) for the sake of webhooks
+
 req.apiUrlPrefix                    // This represents the full package path without any package specific endpoints
                                     // This is particularly useful when constructing webhook URLs
                                     // i.e. https://api.example.com/api/pkg@domain.tld
@@ -172,6 +176,11 @@ req.clientApiUri                    // The api URL for the instance of an app
                                     
 req.pkgId                           // The name of the package being accessed
                                     // i.e. the 'hello@example.com' part of https://api.example.com/api/hello@example.com/kv/foo
+```
+
+Internal (and/or deprecated) APIs that you will very likely encounter
+
+```
 
       req.getSiteStore().then(function (models) {
         req.Models = models;