We're rebuilding our citation index from scratch. All services are available, but you may observe increased latency and temporary coverage issues. If you're attending PUBMET in Zadar, come and say hi!

Web-Scale Citation Tracking

Summarize the attention surrounding any document, and discover insightful links.

Uncover Citations to and from All Types of Content

Cobaltmetrics crawls the web to index hyperlinks and persistent identifiers as first-class citations. We analyze a wide range of websites to reveal insightful links between documents.

Cobaltmetrics goes deeper than backlink databases and altmetrics aggregators to help you report on all types of content: publications, books, clinical trials, patents, software artifacts, derivative works, etc. The web is our corpus, and our URI transmutation API collates citations to all known versions of a document.

Login or register to get started, or see our our documentation to learn more about Cobaltmetrics.

URI Transmutation!

Our URI transmutation API finds URIs that directly or indirectly identify the same document. Try it out!

Cobaltmetrics stores identifiers as URIs, so every search term should consist of a scheme, a colon, and a value. For example, to search for RFC 3986, enter rfc:3986. All URLs are URIs, so you can also enter HTTP or HTTPS URLs. For each URI in the search bar, our API returns all URIs known to be equivalent to that URI.

Cobaltmetrics API

Our RESTful API delivers clean, structured, and stable data, which you can integrate easily into a wide variety of applications, including monitoring services and business intelligence solutions.

Our API allows you to interact with Cobaltmetrics programmatically from your own application:

  • Extract machine-readable web-scale citation data from our citation index;
  • Tap into the power of URI transmutation on your own data.

Login or register to dig into our data, or see the API documentation.

Bulk access to unfiltered data feeds is also available, contact us for details.

Sources & Statistics

Login or register for an API key to get statistics and much more for all URIs that Cobaltmetrics tracks on the web.

Cobalt Papers

Do you want to know where Cobaltmetrics stands in the altmetrics movement, and what we want to push for?

Check out our latest stories on Medium: Legal citation analysis with CourtListener and Cobaltmetrics, Web-scale citation tracking: can you read the signs?, Toward privacy-preserving altmetrics exploration, Supporting Sci-Hub, one URL at a time, and Altmetrics for all.

See also the complete list of blog posts, slide decks, and posters written about Cobaltmetrics.