In addition to the web interface, the open access monitor offers an open REST API, which is available at https://api.open-access-monitor.de/.
We have a fair use policy for the API. Although there are no fixed quotas, we reserve the right to take appropriate measures should we notice above-average utilization. If you are planning very large queries, please consult us in advance. The technical documentation of the possible endpoints can be found at https://api.open-access-monitor.de/swagger/.