Core Web Vitals
Track LCP, TTFB, and other key metrics on every run, per region.
Platform / Website Monitoring
Know the moment your website breaks for a real customer.
Real-browser monitors test your website from locations across the globe in Chromium, Firefox, and WebKit (Safari). Each run loads the page, measures how it renders, and checks the result, so you are the first to know when a third-party script takes down checkout or a page goes blank.
Chromium, Firefox & WebKitCore Web VitalsVisual regressionHAR captureOTEL traces
https://shop.acme.comREC · synthetic
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01/04navigatepassed · 412ms
Globalmonitoring locations across the globe
24/7continuous website monitoring
3engines: Chromium, Firefox, WebKit
CWVCore Web Vitals tracked
See one run
Every request. Every render. Captured as OTEL.
A website check is not a black box. Every span, from first-mile DNS to edge TLS, origin backend, and client render, is a verifiable hop.
Journey waterfall · login to dashboardOTEL trace complete
DNS
18ms
TLS
42ms
HTML
184ms
JS bundle
312ms
API /session
142ms
dashboard.loaded
412ms
Minutes to live monitors
Set up fast. Start from a URL.
Start from a URL and ship monitors in minutes, not a long scripting project. Choose the browser and viewport, set your performance budgets, and schedule the check alongside your API monitors and workflows.
Add a URL, set assertions and budgets, and schedule without scripts
Fail a run on a non-2xx response, a console error, or a blown LCP, CLS, or FCP budget
Schedule it with your API monitors and workflows
Private nodes for WAF-protected and pre-production environments
login-journey.tsTypeScript
browserJourney('login', async (page) => {
await page.goto('https://acme.com');
await page.getByRole('link', { name: 'Sign in' }).click();
await page.getByLabel('Email').fill(vault('user'));
await expect(page).toHaveURL(/dashboard/);
expect(page.vitals.LCP).toBeLessThan(2500);
});Core Web Vitals
Field-grade vitals from every region, continuously.
LCP, TTFB, and FCP are tracked on every run, per region. Know when your site or a third party you rely on impacts your website performance.
Key AEO / GEO / SEO metrics tracked continuously
Alert on any change that falls out of expected ranges
Share results across your existing tooling to correlate environment changes
Core Web Vitals · /pricingGood
LCP
1.2s
INP
124ms
CLS
0.04
TTFB
284ms
FCP
0.9s
From alert to root cause
Route the right context to the right team, fast.
When something breaks, get alerted immediately via webhooks, OpenTelemetry, or your existing observability toolchain, with a context-rich payload and full page-level waterfall to investigate.
Webhook and OTEL-compatible alert delivery
Full page-level waterfall for investigation
Route to the right team with specific incident context
Share reports with stakeholders seamlessly
Alert · checkout journey
Failure detected · eu-west · 2 regions
# last 3 runs
FAIL 14:02:08 · eu-west-1 · step 4 · timeout
FAIL 14:01:02 · eu-west-2 · step 4 · timeout
FAIL 14:00:01 · eu-west-1 · step 4 · timeout
Routed to
Slack #sre-prodPagerDuty · P1Webhook -> ops.acmeEmail · oncall
Key Features
Everything you need in production.
Global coverage
Test from locations across the globe, on the networks your customers use.
Private nodes
Run the same browser monitors inside your network against staging or WAF-protected apps.
Page-level waterfalls
Full waterfall and OTEL trace on every run, ready for your APM.
Console errors
Fail a run on any JavaScript console error, so a broken script never goes unnoticed.
Smart alerts
Alert on consecutive failures from multiple regions, not noisy single-run flakes.
Stream website monitoring results into your APM, SIEM, or data lake
DatadogDynatraceSplunkGrafanaNew RelicHoneycombAkamaiPagerDutySlackOpsGenie
Explore more from APIContext
Get your first website monitor running today.
Add a URL and your first browser monitor can be running in minutes. Available on all paid plans; contact support to enable it.