keyword

n 400

Monthly search volume and cost-per-click data for "n 400" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=n+400&country=us" +--------------+------------------+ | volume | 49,500 | | cpc | $2.38 | | competition | 0.01 | | country | US | | updated | 2026-06-19 | +--------------+------------------+

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
n-400	49,500	$2.38	20/20
n-400 form	22,200	$1.62	20/20
n 400 form	18,100	$2	20/20
n-400 application	14,800	$1.93	20/20
form n 400	6,600	$1.83	20/20
form n-400	6,600	$1.83	20/20
n-400 form instructions	6,600	$1.56	20/20
n-400 instructions	6,600	$0.86	20/20
n-400 uscis	6,600	$4.78	20/20
uscis 400 form	6,600	$3.22	20/20

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=n+400&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