keyword

when was the 27th amendment ratified

Monthly search volume and cost-per-click data for "when was the 27th amendment ratified" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=when+was+the+27th+amendment+ratified&country=us" +--------------+------------------+ | volume | 1,300 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-26 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
27th amendment	40,500	$0.63	20/20
amendment 27	33,100	$0.61	20/20
what is the 27th amendment	2,400	$0.01	20/20
29th amendment	1,900	$0	17/20
27th amendment simplified	1,600	$0	20/20
last amendment of the constitution	1,600	$0	20/20
when was the last amendment passed	1,300	$0	20/20
what is amendment 27	480	$0	17/20
when was 27th amendment passed	110	$0	17/20
27th amendment year	40	$0	18/20

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=when+was+the+27th+amendment+ratified&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