aid: userstack
name: Userstack
description: "Secure User-Agent String Lookup JSON API"
url: https://userstack.com/?utm_source=Github&utm_medium=Referral&utm_campaign=Public-apis-repo-Best-sellers
specificationVersion: '0.20'
created: '2026-05-28'
modified: '2026-05-28'
x-source: public-apis/public-apis
x-category: "Development"
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
  - Development
  - Public APIs
apis:
  - name: Userstack
    description: "Secure User-Agent String Lookup JSON API"
    humanURL: https://userstack.com/?utm_source=Github&utm_medium=Referral&utm_campaign=Public-apis-repo-Best-sellers
    baseURL: https://userstack.com/?utm_source=Github&utm_medium=Referral&utm_campaign=Public-apis-repo-Best-sellers
    tags:
      - Development
    properties:
      - type: Documentation
        url: https://userstack.com/?utm_source=Github&utm_medium=Referral&utm_campaign=Public-apis-repo-Best-sellers
common:
  - type: Website
    url: https://userstack.com/?utm_source=Github&utm_medium=Referral&utm_campaign=Public-apis-repo-Best-sellers
  - type: PublicAPIsListing
    url: https://github.com/public-apis/public-apis
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com