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keyword

surface barriers definition

Monthly search volume and cost-per-click data for "surface barriers definition" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=surface+barriers+definition&country=us" +--------------+------------------+ | volume | 30 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-25 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
barriers in the body 110 $0 4/20
surface barrier 110 $0 3/20
surface barriers 110 $0 3/20
4 types of barriers in innate immunity 90 $0 3/20
innate immunity physical barriers 90 $0 3/20
physical barriers in innate immunity 90 $0 3/20
physical barriers of innate immunity 90 $0 3/20
surface membrane barriers 20 $0 5/20
physical barrier biology 20 $0 4/20
physical barriers biology 20 $0 4/20

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=surface+barriers+definition&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