keyword

proof of work letter

Monthly search volume and cost-per-click data for "proof of work letter" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=proof+of+work+letter&country=us" +--------------+------------------+ | volume | 6,600 | | cpc | $2.17 | | competition | 0.45 | | country | US | | updated | 2026-05-16 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
employment letter verification	33,100	$2.55	20/20
employment of verification letter	33,100	$2.29	20/20
verification letter from employer	33,100	$2.29	20/20
employment verification letter	27,100	$3.13	20/20
employment verification letter sample	27,100	$3.13	20/20
job verification letter	27,100	$3.13	20/20
verification of employment letter	27,100	$2.25	20/20
employment proof letter	6,600	$2.39	20/20
proof of employment letter sample	6,600	$2.17	20/20
proof of work letter sample	6,600	$2.17	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://app.seodata.dev/v1/keyword?q=proof+of+work+letter&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