Actually - I spoke too soon - it seems I do have AGILE-FLEX-22-11-25 implemented, so put in &tariff=AGILE-FLEX-22-11-25&region=X (replacing X with your region letter, eg C for London) . There are only prices since November 2022, so if you want to know what Agile prices would have been for an earlier date you'll need to check on AGILE-18-02-21 or AGILE-22-07-22 for those.