seodata.dev

keyword

1981 20 dollar bill errors

Monthly search volume and cost-per-click data for "1981 20 dollar bill errors" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=1981+20+dollar+bill+errors&country=us" +--------------+------------------+ | volume | 40 | | cpc | $0 | | competition | 0.02 | | country | US | | updated | 2026-06-16 | +--------------+------------------+
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
1981 twenty dollar bill 2,900 $0.03 4/20
20 dollar bill 1977 2,900 $0.02 4/20
1981 20 dollar bill value 1,600 $0.31 6/20
1981 20 70 $0 5/20
1981 20 dollar bill misprint 40 $0 6/20
1981 $20 dollar bill real or fake 40 $0 5/20
1985 20 dollar bill h series 40 $0 5/20
1981 20 dollar bill fake 30 $0 8/20
1981 20 dollar bill serial number lookup 30 $4.07 5/20
what does a 1981 $20 bill look like 30 $0 5/20

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=1981+20+dollar+bill+errors&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