Changing to API connectivity requires an upgrade from the DSB’s Registered User category to a Power User
An overview of the DSB Fee Model for the year ending 2018 is available here.
If joining mid-year, the applicable charges would be a quarterly based pro-rata’d amount based on the prevailing fee structure (Power Users fees are €112,500 p.a. for the full year ending 2018).
Full details about fees can be found in the Charges Policy which is available here.
If wishing to upgrade mid-year, a new Access and Usage Agreement would need to be executed and applicable charges would apply