seodata.dev

keyword

what is the sound barrier

Monthly search volume and cost-per-click data for "what is the sound barrier" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=what+is+the+sound+barrier&country=us" +--------------+------------------+ | volume | 1,900 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-08-18 | +--------------+------------------+
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
sound barrier sound 8,100 $2.01 18/20
sound barrier speed 3,600 $0 20/20
speed of sound barrier 3,600 $0 19/20
breaking barrier of sound 2,900 $0 20/20
breaking sound barrier 2,900 $0.02 19/20
breaking the sound barrier 2,900 $0.02 17/20
breaking the sound barrier sound 2,900 $0.02 17/20
what is sound barrier 1,900 $0 20/20
how fast is breaking the sound barrier 1,600 $0 17/20
how fast is the sound barrier 1,000 $0 17/20

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=what+is+the+sound+barrier&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