Speed Test API Put a real speed test inside your product.
Download, upload, latency and jitter from a JavaScript API and a Node SDK. Add it to any site or app in minutes, with no infrastructure to run. Over 120 million tests have gone through it.
30-day free trial · 100 API calls
No credit card · Trusted since 2013
<script src="https://speedof.me/api/api.js"></script>
SomApi.account = 'YOUR_API_KEY';
SomApi.onTestCompleted = (r) => console.log(r);
SomApi.startTest();useEffect(() => {
SomApi.account = 'YOUR_API_KEY';
SomApi.onTestCompleted = (r) => setResult(r);
SomApi.startTest();
}, []);const { SpeedTest } = require('@speedofme/mcp');
const test = new SpeedTest({ apiSecret: KEY });
const result = await test.run();
console.log(result.download, result.jitter);"mcpServers": {
"speedofme": {
"command": "npx",
"args": ["-y", "@speedofme/mcp"],
"env": { "SOM_API_SECRET": "YOUR_API_SECRET" }
}
}What people build with it
The six things our customers actually use this API for, ordered by how much traffic each one sends us.
Hiring, Interviews & Exams
Check a candidate before the interview or the proctored exam starts
Remote Agents & Contact Centres
Prove an agent is fit to take calls at the start of a shift
Apps, Devices & Software
Measure real throughput from inside your own app or device fleet
Video, Webinars & Streaming
Catch a bad connection before the session, not during it
ISPs & Broadband Providers
Your own branded speed test, and diagnostics your support team can use
Online Learning & Telehealth
Make sure the class or the consultation will actually work
Why Thousands of Developers Choose Us
Battle-Tested Since 2013
The original speed test API, with over 120 million tests run through it
Real-World Accuracy
Measures what your user actually experiences, on their own connection
Deploy in Minutes
One script tag. No servers to run, no test files to host.
Scales With You
From a first local test to tens of millions of calls a month
Quick Start: Add a Speed Test in Minutes
Embed the speed test on any web page with a few lines of JavaScript.
<script src="https://speedof.me/api/api.js"></script>
<script>
SomApi.account = 'YOUR_API_KEY';
SomApi.domainName = 'yourdomain.com';
SomApi.onTestCompleted = function (result) {
console.log(result.download, result.upload,
result.latency, result.jitter);
};
SomApi.startTest();
</script>Full configuration, callbacks and the result schema are in the API documentation.
AI Agent Integration
Run speed tests directly from AI agents and automation tools
MCP Server
Native integration with Claude, Cursor, Windsurf, and other AI platforms via Model Context Protocol
CLI Tool
Command-line speed testing for scripts, CI/CD pipelines, and automation workflows
JavaScript SDK
Promise-based API for Node.js applications. Same package, three interfaces
Local History
Results stored locally in JSON format for trending and analysis
Analytics Dashboard
Real-time insights into your API usage
- Usage Statistics - Track API calls, test counts, and bandwidth consumption in real-time
- Geographic Distribution - See where your users are testing from with country and city breakdowns
- Device & Speed Insights - Monitor device types, average speeds, and latency trends
Plans and Pricing
- 10,000 API calls included
- $0.045/extra test
- Technical Support
- No credit card required
- Full API access for 30 days
- Cancel anytime
* Free trial includes 100 API calls.
Speed Test API FAQ
How do I add a speed test to my website or app?
Include our JavaScript API (api.js), set your account key and domain, then call SomApi.startTest(). Download, upload, latency and jitter arrive via callbacks. Ready-made examples cover vanilla JS, React, Vue, Angular, iOS, Android, Flutter, Electron and more.
Is the speed test API free?
It is a paid API with a free trial: 30 days and 100 API calls, no credit card required. Paid plans start at $49/month and scale to Enterprise for high volume.
What does the API measure?
Download speed, upload speed, latency and jitter, using the same single-stream HTML5 engine as SpeedOf.Me for real-world accuracy.
Can AI agents and scripts run speed tests?
Yes. The @speedofme/mcp package is an MCP server for AI agents, a CLI for scripts and CI pipelines, and a Node.js SDK, all from one install.
Which platforms are supported?
Web (JavaScript), plus example integrations for iOS, Android, macOS, Windows, Electron, Flutter, React, Vue, Angular and React Native.
Have more questions? Read the full FAQ →