keyword

what was the phlogiston theory

Monthly search volume and cost-per-click data for "what was the phlogiston theory" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=what+was+the+phlogiston+theory&country=us" +--------------+------------------+ | volume | 260 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-08 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
phlogiston	5,400	$0	17/20
phlogiston theory definition	720	$0	15/20
phlogiston definition	720	$0	6/20
phlogiston theory	590	$0	20/20
theory of phlogiston	590	$0	14/20
what is the phlogiston theory	260	$0	19/20
what is phlogiston theory	260	$0	17/20
what is phlogiston	260	$0	11/20
phlogiston meaning	170	$0	9/20
what is phlogiston called now	30	$0	10/20

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+was+the+phlogiston+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