Policy Variables Capture will capture the values of the API assembly's "set-variable" policy variables and optionally capture DataPower's context name variables. 

The Policy variables capture page shows the currently active captures and allows to start new captures.
The capture will run on all transaction of a specific API Name from a specific Catalog that runs on the device.
The capture will run indefinitely until manually stopped from this page (use the "Stop Capture" button).

Click "New Capture" to start a new capture, enter the capture details (no wildcards are allowed)
You may also add a DataPower's context name to capture (var://context/myContext)

The values will be displayed in the Policy Details Window in the API Connect Single Transaction page under "Context Variables".
The capture is limited in size to 2kb of variable names data and 2kb of variable values data, an informational message will appear above the context variables list if some variable names or values were not included.

Permissions and Retention

Please refer to the Policy Variables Capture Settings and Authorization page in the admin guide.