keyword

r04

Monthly search volume and cost-per-click data for "r04" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=r04&country=us" +--------------+------------------+ | volume | 260 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-08-31 | +--------------+------------------+

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
return code r04	720	$0	6/20
r04 return code	720	$0	5/20
ach return code r04	170	$0	7/20
r04 ach return code	170	$0	5/20
r04 invalid account number	70	$0	7/20
ach r04	50	$0	8/20
r04 ach return	50	$0	5/20
icd 10 r04	40	$0	5/20
icd-10 r04	40	$0	5/20
what does invalid account number mean	40	$0	5/20

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=r04&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