Hello! OAuth signin isn't ready yet, so to play with the transaction heatmap, you'll need to sign in at https://staging-developers.getmondo.co.uk/ (for staging) and paste your Sandbox Access Token into the form field below. Remember that this isn't ready for public use yet!
Credentials you enter here will be saved in your web browser's local storage, and sent to the Mondo servers to authorise your API call. Use at your own risk!