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keyword

what is quantum theory

Monthly search volume and cost-per-click data for "what is quantum theory" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=what+is+quantum+theory&country=us" +--------------+------------------+ | volume | 1,300 | | cpc | $11.45 | | competition | 0.01 | | country | US | | updated | 2026-06-13 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
quantum mechanics physics 60,500 $4.24 20/20
what are quantum physics 18,100 $4.21 20/20
what is quantum mechanics 18,100 $6.34 20/20
what is quantum physics 18,100 $2.88 20/20
what is quantum theory in physics 18,100 $2.88 20/20
define quantum theory 9,900 $8.61 20/20
quantum mechanics definition 9,900 $6.54 20/20
quantum physics definition 9,900 $4.05 20/20
quantum theory definition 9,900 $2 20/20
quantum theory 8,100 $4.12 20/20

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=what+is+quantum+theory&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt