seodata.dev

keyword

ch 21

Monthly search volume and cost-per-click data for "ch 21" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=ch+21&country=us" +--------------+------------------+ | volume | 720 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-24 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
21 news 5,400 $5.76 4/20
news channel 21 4,400 $2.1 4/20
wliw schedule 4,400 $1.86 4/20
channel 21 news 3,600 $0 4/20
channel 21 2,900 $1.69 8/20
ch-21 720 $0 19/20
ch 21 helicopter 480 $0 6/20
ch-21 helicopter 480 $0 6/20
piasecki h 21b 320 $0 5/20
ch21 70 $0 6/20

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=ch+21&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt