seodata.dev

keyword

optics textbook

Monthly search volume and cost-per-click data for "optics textbook" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=optics+textbook&country=us" +--------------+------------------+ | volume | 140 | | cpc | $0.26 | | competition | 0.64 | | country | US | | updated | 2026-06-03 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
optics books 170 $0.36 8/20
book on optics 170 $0.67 7/20
books on optics 170 $0.67 7/20
books about optics 170 $0.67 6/20
optics textbooks 70 $1.06 8/20
introduction to optics book 50 $0.41 4/20
best books for optics 40 $0.33 6/20
best book on optics 40 $0.33 5/20
best optics textbook 40 $0.33 5/20
best books on optics 40 $0.29 4/20

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=optics+textbook&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