OneSignal

Self-serve customer engagement solution for Push Notifications, Email, SMS & In-App

Official docs outline

Extra Credit builds an outline of OneSignal's docs the first time your work uses it. Until then, start at the official documentation.

NameGender Gender from a first name, full name, email or username, with probability
Nationalize.io Estimate the nationality of a first name
Nerdulator Everything derivable from one value: numbers, dates, colours, UUIDs, cron expressions
NetworkCalc Network calculators, including subnets, DNS, binary, and security tools
npm Registry Query information about your favorite Node.js libraries programatically
NuGet .NET package versions, metadata and search
Open Page Rank API for calculating and comparing metrics of different websites using Page Rank algorithm
Open VSX Search and access VS Code extensions from the Open VSX registry
OpenAPIHub The All-in-one API Platform
OpenApps Rankings, launches and featuring across the ChatGPT, Claude, Cursor and Grok Bot app stores
OpenGraphr Really simple API to retrieve Open Graph data from an URL
OpenQR Generate QR codes and manage dynamic (editable) QR codes with scan analytics