Open infrastructure for linking research objects, entities, and actions across the scholarly record.

Crossref is a nonprofit open digital infrastructure organization serving the global scholarly research community. As the largest Digital Object Identifier (DOI) Registration Agency of the International DOI Foundation, Crossref enables persistent cross-platform citation linking for academic journals, books, datasets, and other research outputs. With over 23,000 members across 164 countries, it facilitates metadata exchange and supports billions of monthly API queries, underpinning open science and global research communication.