A powerful API stress testing and performance profiler tool built directly into VS Code.
What is API Stress Studio?
API Stress Studio lets you stress test and measure response times of any API endpoint without leaving VS Code. No external tools, no browser tabs — everything runs inside a dedicated panel in your editor.
Features
Stress Testing — Fire multiple concurrent requests to any API endpoint and observe how it handles load
Response Time Profiling — Measure latency on demand, per request and in aggregate
On-Demand Testing — Run tests instantly whenever you need, directly from the VS Code sidebar
Built-in Webview UI — Clean, integrated interface in the Activity Bar — no external apps needed
Getting Started
1. Open the panel
Click the API Stress Studio icon in the Activity Bar (left sidebar), or run:
Ctrl+P → API Stress Studio: Open
2. Configure your request
Enter the target URL
Select the HTTP method
Set the number of requests and concurrency level
3. Run & analyze
Hit Run and watch response times, success rates, and performance metrics update in real time.
Requirements
VS Code ^1.74.0
Internet access to reach the target API
Extension Settings
No configuration required — everything is handled through the UI panel.