Cost / License
- Paid
- Proprietary
Application typeApplication types
Platforms
- Online
- Software as a Service (SaaS)




Apps similar to Assertible include Postman, which has a free version. Other options are Insomnia REST Client, Yaak, Hoppscotch and Pingdom. You're spoiled for choice with API Clients like Assertible: we list more than 50 alternatives for Mac, Linux, Windows, the web and Chrome OS.




Unlimited monitors checked from multiple location every minute. Monitor any port or setup a "heartbeat" that works well for cron jobs or any service behind a firewall. Be alerted as soon as your service is offline via email or app integration.

Gotcha HTTP Client is a lightweight http client that allows you to make requests and inspect responses.




Uptimely simplifies monitoring the uptime of your services, alerts you to downtime, and helps you create status pages to keep your customers informed.
Send HTTP requests to API endpoints. GetIt's main focus is to make your life a lot easier when you have to test APIs or use somebody else's API.




EchoAPI is an all-in-one API development collaboration platform that offers essential features like API debugging, design, automated testing, stress testing, and documentation generation.
apikumo is an API workspace that combines an API client, a hosted documentation site, and a live MCP (Model Context Protocol) endpoint in one place. Design your API once, and every AI agent can call it.



Free uptime monitoring for websites, servers and APIs. Supports HTTP, TCP, UDP and ICMP. Instant alerts to Telegram, Discord, Slack.







Web monitoring service, which checks website every 5 minutes. It detects when it's offline, redirected, broken or even hacked. Provides SMS and email notifications, statistics and logs.


