keyword

biro invented ballpoint pen

Monthly search volume and cost-per-click data for "biro invented ballpoint pen" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=biro+invented+ballpoint+pen&country=us" +--------------+------------------+ | volume | 1,600 | | cpc | $0.12 | | competition | 0.01 | | country | US | | updated | 2026-06-29 | +--------------+------------------+

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
biro pen	2,900	$0.67	18/20
who invented the ballpoint pen	2,400	$0	20/20
when was the ballpoint pen invented	2,400	$0.08	16/20
ballpoint pen inventor	1,600	$0.02	20/20
biro pen inventor	1,600	$0.02	20/20
when was the biro invented	1,600	$0.02	20/20
ballpoint pen invented	1,600	$0.12	17/20
ballpoint pen invention	1,600	$0.12	17/20
biro invented	1,600	$0.02	16/20
who invented the biro ballpoint pen	1,000	$0.05	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=biro+invented+ballpoint+pen&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