What is Faceted search?
Verified 5 August 2026
Facets answer questions the results themselves do not: is this coverage concentrated in one publisher, spread evenly across years, dominated by one content type. For a human interface they drive filter menus.
For an agent they are a cheap control loop. One request with facets tells the agent whether to broaden, narrow or disambiguate — decisions it would otherwise make by reading documents and paying for the tokens.
How unlob handles this: Facets
Common questions
What is Faceted search?
Faceted search returns counts across categorical dimensions alongside results, letting a user or agent see the shape of a result set before reading it.
How does Faceted search work in practice?
For an agent they are a cheap control loop. One request with facets tells the agent whether to broaden, narrow or disambiguate — decisions it would otherwise make by reading documents and paying for the tokens.
See it working
The free tier is 10,000 requests a month with no card — enough to test any of this against your own queries.