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Filter concepts

You can filter concepts with the filter parameter:
Get concepts that are at level 0 (top level)
https://api.openalex.org/concepts?filter=level:0​
It's best to read about filters before trying these out. It will show you how to combine filters and build an AND, OR, or negation query
/concepts attribute filters
You can filter using these attributes of the Concept object (click each one to view their documentation on the Concept object page):
​ancestors.id​
​cited_by_count​
​ids.openalex (alias: openalex)
​level​
​summary_stats.2yr_mean_citedness (accepts float, null, !null, can use range queries such as < >)
​summary_stats.h_index (accepts integer, null, !null, can use range queries)
​summary_stats.i10_index (accepts integer, null, !null, can use range queries)
​works_count​
/concepts convenience filters
These filters aren't attributes of the Concept object, but they're included to address some common use cases:
default.search
Value: a search string
This works the same as using the search parameter for Concepts.
display_name.search
Value: a search string
Returns: concepts with a display_name containing the given string; see the search page for details.
Get concepts with display_name containing "electrodynamics":
https://api.openalex.org/concepts?filter=display_name.search:electrodynamics​
In most cases, you should use the search parameter instead of this filter because it uses a better search algorithm.
has_wikidata
Value: a Boolean (true or false)
Returns: concepts that have or lack a Wikidata ID, depending on the given value. For now, all concepts in OpenAlex do have Wikidata IDs.
Get concepts without Wikidata IDs:
https://api.openalex.org/concepts?filter=has_wikidata:false​

Get lists of concepts

Search concepts

Last modified 3mo ago

Filter concepts

`/concepts` attribute filters

`/concepts` convenience filters

`default.search`

`display_name.search`

`has_wikidata`