API latency performance graph

API Testing
& Performance Analysis

How are your critical APIs doing?

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Find out about problems before they affect your apps, users or customers.

API test and performance tool community


Get real API performance metrics for the services that you use, provide or need. Understand what drives reliability, uptime, latency and the quality of APIs you supply or depend on everyday. Get real data on API performance before you select APIs for integration to your apps. Use our library of hundreds of API calls against all the major services to test uptime and reliability before you integrate and launch. Save time, effort and money by picking the right APIs before you go to market. Tell me more >>

Developer API testing


For when HTTP-200 isn’t all ok. Test the APIs you use. Understand how fast and reliable they are and debug them quickly. Set customizable failure alerts for badly formed JSON or other unexpected results. Configure sequences of tests from our online tool for the key scenarios you depend on, then run them from anywhere in the world. Understand how geography affects your performance and how real-world conditions can impact your user performance where they actually are. Tell me more >>

Enterprise API test and Performance tool


A complete enterprise class tool with multiple user accounts, test and report sharing options and API access to tests and result logs. Schedule tests globally or run tests from inside your infrastructure on the APIs you depend on or deliver. Get alerted to slow downs or problems before your customers tell you. Provide third party tables and charts of performance to give additional assurances to your users. Create custom events, script multiple API calls together and provide dashboards for internal and external use. Monitor critical SLAs or ensure you’re meeting ones you commit to. Tell me more >>

Immediate Access.
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Get 30 days of Pro service free and schedule up to 100 private tests per hour. No credit card required. After 30 days you can continue or use our free version and join our community.

Pricing Info

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Client and Partner Snapshot



We use the APImetrics platform to measure performance for our developer APIs from customer/developer perspective….. Ed Schmidt – Director Developer API Program AT&T



Radius is proud to partner with APImetrics to deliver our API Performance Monitoring Solution … performance is an essential element for capitalizing on the growth of the Internet of Things¬†. Anders Brown – Managing Director

Enterprises contact us for a free Group Account trial. >> Contact Us