keyword

luhn formula

Monthly search volume and cost-per-click data for "luhn formula" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=luhn+formula&country=us" +--------------+------------------+ | volume | 9,900 | | cpc | $9.82 | | competition | 0 | | country | US | | updated | 2026-06-28 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
luhn algorithm	9,900	$2.43	20/20
luhn check digit	9,900	$2.43	20/20
algorithm luhn	9,900	$2.43	16/20
luhn check	1,000	$0	18/20
luhn formula credit card	590	$0	16/20
what is luhn algorithm	90	$0	17/20
what is a luhn check	90	$0	16/20
what is luhn check	90	$0	16/20
luhn algorithm formula	40	$0	16/20
the luhn algorithm	30	$0	16/20

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://api.seodata.dev/v1/keyword?q=luhn+formula&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