min_centrality
floatRequires a minimum graph centrality — how load-bearing a passage is in its neighbourhood.
Centrality is a PageRank-style score over the coverage graph, computed at build time and stored in a fast field. Filtering on it selects for passages the rest of the corpus treats as foundational, independent of how well they match your query terms.
This is the cheapest way to bias toward canonical sources without hand-maintaining an allowlist.
Example
curl -H "x-api-key: $UNLOB_API_KEY" \
"https://api.unlob.com/search?q=transformer+architecture&min_centrality=0.4"Common questions
What does the min_centrality filter do?
Requires a minimum graph centrality — how load-bearing a passage is in its neighbourhood.
When should I use min_centrality?
Entering an unfamiliar domain, or when you want canonical rather than merely matching.
How does min_centrality behave in practice?
This is the cheapest way to bias toward canonical sources without hand-maintaining an allowlist.
Filters are free
Every filter is evaluated against a stored field, so it narrows the candidate set before scoring — a filtered query is often faster than an unfiltered one.