Announcing changes to REST API rate limits

Scholarly metadata
Scholarly infrastructure
Authors

Martyn Rittman

Luis Montilla

Published

November 5, 2025

Doi

https://doi.org/10.64000/wadve-3tj60

Abstract
Our REST API makes all of the metadata we hold publicly available. It receives the majority of our API traffic, with around 1 billion hits per month. It’s one of the key ways that we fulfil our mission to make research objects easy to find, cite, link, assess, and reuse. From 1 December 2025, we will be revising the rate limits for the public and polite pools of the REST API to ensure that we can maintain a stable and reliable system, and that metadata is freely available to everyone.
Related items

Citation

BibTeX citation:
@online{rittman2025,
  author = {Rittman, Martyn and Montilla, Luis},
  title = {Announcing Changes to {REST} {API} Rate Limits},
  date = {2025-11-05},
  url = {https://www.luismmontilla.com/posts/crossref/202511/},
  doi = {https://doi.org/10.64000/wadve-3tj60},
  langid = {en},
  abstract = {Our REST API makes all of the metadata we hold publicly
    available. It receives the majority of our API traffic, with around
    1 billion hits per month. It’s one of the key ways that we fulfil
    our mission to make research objects easy to find, cite, link,
    assess, and reuse. From 1 December 2025, we will be revising the
    rate limits for the public and polite pools of the REST API to
    ensure that we can maintain a stable and reliable system, and that
    metadata is freely available to everyone.}
}
For attribution, please cite this work as:
Rittman, Martyn, and Luis Montilla. 2025. “Announcing Changes to REST API Rate Limits.” Crossref Blog, November 5. https://doi.org/https://doi.org/10.64000/wadve-3tj60.