APId is described as 'Don’t just check for 200’s, model complex customer flows and monitor their realtime performance from around the world. Get notified the instant something goes wrong' and is a Uptime Monitor in the Development category. There are more than 100 alternatives to APId for a variety of platforms, including Online / Web-based, Windows, Mac, Linux and SaaS. Most alternatives are Uptime and Website Monitors. The best alternative is Insomnia REST Client, which is both free and Open Source. Other great apps like APId are Postman (Freemium), UptimeRobot (Freemium), HTTPie (Free, Open Source) and Paw (Paid).
Postman is a tool that facilitates the development and use of APIs. Postman provides all the functionality needed to create or simulate API specifications and use the Postman Collection Runner to create tests.
Dashboard with 50 Monitors, Checked Every 5 Minutes, Totally Free.
Monitor HTTP(S), Ping, Port and check Keywords.
Get alerted via e-mail, SMS, Twitter, web-hooks or push.
View uptime, downtime and response times.
Easily craft your HTTP requests, try them, archive them. Setup HTTP Headers, URL parameters, form-encoded POST key-values or text. Get easy-to-read responses with well formatted headers and body. Sync your projects with your team through Paw for Teams.
Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your website as experienced by visitors.