'Ankara, Turkey – January 31, 2025: Aerial view of Ankara Castle and surrounding historic district with red-roofed houses in Ankara, Turkey, under a clear blue sky.

Crossref runs open infrastructure to link research objects, entities, and actions, creating a lasting and reusable scholarly record that underpins open science. Together with our 23,000 members in 163 countries, we drive metadata exchange and support nearly 2 billion monthly API queries, facilitating global research communication, for the benefit of society.