seodata.dev

keyword

flexion extension

Monthly search volume and cost-per-click data for "flexion extension" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=flexion+extension&country=us" +--------------+------------------+ | volume | 5,400 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-27 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
flexion vs extension 9,900 $0 20/20
flexion and extension 5,400 $0 20/20
flexion/extension 5,400 $0 19/20
flexion vs extension hip 2,400 $0 14/20
extension movement 1,300 $0 15/20
extension definition in anatomy 1,300 $0 13/20
what is flexion 1,300 $0 13/20
what is flexion and extension 260 $0 14/20
difference between flexion and extension 260 $0 13/20
flexion extension movement 170 $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://app.seodata.dev/v1/keyword?q=flexion+extension&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