seodata.dev

keyword

usps plus 4

Monthly search volume and cost-per-click data for "usps plus 4" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=usps+plus+4&country=us" +--------------+------------------+ | volume | 2,400 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-24 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
zip4 usps 18,100 $0.12 20/20
plus 4 zip code 6,600 $0 20/20
zip code plus 4 6,600 $0 20/20
united states postal service zip code plus 4 4,400 $0.44 20/20
last 4 digits of zip code 2,900 $0 20/20
zip code 4 digit extension 1,900 $0 20/20
4 digit zip code 1,600 $0 20/20
what is my zip plus 4 1,300 $0 20/20
usps 9 digit zip code 1,000 $0.13 20/20
usps postal code 1,000 $0.03 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=usps+plus+4&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