keyword

1988 20 dollar bill serial number lookup

Monthly search volume and cost-per-click data for "1988 20 dollar bill serial number lookup" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=1988+20+dollar+bill+serial+number+lookup&country=us" +--------------+------------------+ | volume | 720 | | cpc | $0 | | competition | 0.03 | | country | US | | updated | 2026-06-14 | +--------------+------------------+

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
1988 a $20 bill	3,600	$0.08	16/20
1988 20 dollar bill	3,600	$0.05	15/20
20 dollar bill 1988	3,600	$0.05	14/20
series 1988 a 20 dollar bill	1,300	$0.42	16/20
20 dollar bill serial number lookup value	720	$1.41	14/20
1988 $20 dollar bill serial number lookup	260	$2.02	14/20
1981 $20 dollar bill serial number lookup	260	$1.48	12/20
1988 series a $20 dollar bill serial number lookup	90	$0.72	17/20
1988 series a 20 dollar bill serial number lookup	70	$0	15/20
1988 20 dollar bill b series	40	$0	13/20

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=1988+20+dollar+bill+serial+number+lookup&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