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keyword

what was the 13th amendment

Monthly search volume and cost-per-click data for "what was the 13th amendment" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=what+was+the+13th+amendment&country=us" +--------------+------------------+ | volume | 8,100 | | cpc | $0.55 | | competition | 0.01 | | country | US | | updated | 2026-06-17 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
13 amendments 165,000 $4.12 20/20
13th amendment 165,000 $3.97 20/20
amendment 13 165,000 $4.12 20/20
us constitution 13th amendment 135,000 $7.76 20/20
what is the 13th amendment 14,800 $7.44 20/20
the 13th amendment 9,900 $2.39 20/20
thirteenth amendment 9,900 $5.25 20/20
which amendment abolished slavery 9,900 $0 20/20
which amendment ended slavery 9,900 $0 20/20
what amendment ended slavery 8,100 $2.49 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+was+the+13th+amendment&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