seodata.dev

keyword

rail system

Monthly search volume and cost-per-click data for "rail system" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=rail+system&country=us" +--------------+------------------+ | volume | 1,600 | | cpc | $4.16 | | competition | 0.99 | | country | US | | updated | 2026-06-08 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
rail train 4,400 $1.84 8/20
railroad transport 2,400 $7.96 8/20
transport train 2,400 $6.49 8/20
rail transportation 2,400 $3.72 7/20
rail lines 1,900 $2.47 9/20
railway system 1,600 $4.78 15/20
railway systems 1,600 $4.51 11/20
railsystem 1,600 $4.16 8/20
rail transport in the united states 1,300 $2.66 8/20
railway in usa 1,000 $0.58 8/20

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=rail+system&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