HTTP Latency Monitor

Verify SLA compliance with bulk TTFB and response time checks across hundreds of endpoints in a single run. Slow response times directly impact user experience, search rankings, and uptime commitments — yet most monitoring tools only check one URL at a time. Measure latency at scale with structured, API-ready results.

Features

• Response time measurement — captures total HTTP request latency in milliseconds for each URL
• Bulk monitoring — check hundreds of endpoints concurrently in a single run
• HTTP status tracking — reports the status code returned by each endpoint
• Flexible HTTP method — use HEAD for lightweight checks or GET for full-response timing
• Redirect detection — captures the final URL after any redirects
• Structured output — JSON results ready for dashboards, alerts, or SLA reports

Input

Field	Type	Required	Default	Description
urls	array	Yes	—	List of URLs to measure (e.g., https://example.com). Also accepts objects with a url field
url	string	No	—	Single URL to check (use urls for bulk monitoring)
method	string	No	HEAD	HTTP method to use. HEAD measures server response time; GET includes full body transfer
timeoutSeconds	integer	No	15	Request timeout per URL in seconds (1-60)
concurrency	integer	No	10	Number of URLs to check in parallel (1-50)

Input Example

{
  "urls": [
    "https://example.com",
    "https://api.example.com/health",
    "https://cdn.example.com/assets/main.js"
  ],
  "method": "HEAD",
  "concurrency": 20
}

Output

Each URL produces one dataset record with the measured latency, HTTP status, and any errors encountered.

Key output fields:

• inputUrl (string) — the URL as submitted
• finalUrl (string) — the URL after any redirects
• status (number) — HTTP status code
• latencyMs (number) — total response time in milliseconds
• method (string) — HTTP method used for the check
• error (string | null) — error message if the request failed
• checkedAt (string) — ISO 8601 timestamp

Output Example

{
  "inputUrl": "https://example.com",
  "finalUrl": "https://example.com/",
  "status": 200,
  "latencyMs": 142,
  "method": "HEAD",
  "error": null,
  "checkedAt": "2026-03-09T12:00:00.000Z"
}

Pricing

Event	Cost
URL Check	$0.001

Pay only for URLs successfully checked. Respects your per-run spending limit.

Use Cases

• SLA verification — measure response times across all client endpoints to confirm uptime and latency commitments
• CDN performance audits — compare response times across CDN edge locations and origin servers
• Deployment validation — check response times before and after deployments to catch performance regressions
• Competitive benchmarking — measure competitor site speeds alongside your own for executive reporting
• Scheduled health checks — run periodic latency sweeps and feed results into alerting pipelines

Related Actors

Actor	What it adds
DNS Propagation Checker	Verify DNS resolution alongside response time to isolate network vs. server latency
Broken Links Checker	Crawl sites for broken links — pair with latency data to prioritize slow and broken pages
SSL Certificate Monitor	Monitor certificate expiry to prevent downtime that latency checks alone won't catch