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keyword

library of congress subject headings authorities

Monthly search volume and cost-per-click data for "library of congress subject headings authorities" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=library+of+congress+subject+headings+authorities&country=us" +--------------+------------------+ | volume | 70 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-25 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
subject headings library of congress 2,900 $0 20/20
library of congress subject headings 2,900 $0 18/20
library of congress subject terms 2,900 $0 16/20
lc subject headings 2,900 $0 15/20
lcsh subject headings 2,900 $0 13/20
library of congress subject 2,900 $2.91 12/20
library congress authorities 1,600 $0 20/20
library of congress authorities 1,600 $0 18/20
library of congress subject authorities 70 $0 13/20
library of congress authority headings 30 $0 15/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=library+of+congress+subject+headings+authorities&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt