keyword

what is immune system

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

$ curl "https://app.seodata.dev/v1/keyword?q=what+is+immune+system&country=us" +--------------+------------------+ | volume | 1,300 | | cpc | $2.17 | | competition | 0.02 | | country | US | | updated | 2026-05-25 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
immune system	60,500	$2.93	20/20
system immune	60,500	$3.45	20/20
immune	49,500	$5.21	20/20
immunologic system	49,500	$2.26	20/20
immunology system	49,500	$2.56	20/20
immune system function	5,400	$7.82	20/20
function of the immune system	4,400	$1.81	20/20
functions of the immune system	4,400	$1.81	20/20
immune function	4,400	$2.54	20/20
immune system functions	4,400	$2.16	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+immune+system&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