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keyword

what is amendment 21

Monthly search volume and cost-per-click data for "what is amendment 21" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=what+is+amendment+21&country=us" +--------------+------------------+ | volume | 110 | | cpc | $3.66 | | competition | 0.01 | | country | US | | updated | 2026-06-08 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
21st amendment 60,500 $0.27 20/20
amendment 21 6,600 $0 20/20
amendments 21 6,600 $0 16/20
what is the 21st amendment 4,400 $0 20/20
21th amendment simplified 1,600 $0 20/20
21st amendment simplified 1,300 $0 20/20
the twenty first amendment 1,300 $0 18/20
the twenty-first amendment 1,300 $0 17/20
what amendment repealed prohibition 1,000 $0 18/20
21st amendment definition 390 $0 15/20

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+amendment+21&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