seodata.dev

keyword

who invented railway

Monthly search volume and cost-per-click data for "who invented railway" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=who+invented+railway&country=us" +--------------+------------------+ | volume | 3,600 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-07 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
when were trains invented 4,400 $0 18/20
when was the train invented 3,600 $0 20/20
who discovered train 3,600 $0 20/20
who invented railroads 3,600 $0 20/20
who invented the train 3,600 $0 20/20
who invented trains 3,600 $0 20/20
when was the first train invented 3,600 $0 18/20
who invented the railway 1,000 $0 19/20
invention of the train 590 $0 20/20
the train invention 40 $0 18/20

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=who+invented+railway&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