API Monitoring

Catch slow endpoints before your customers do.

Synthetic health checks running from 12+ global regions, with full DNS/TCP/TLS/server timing breakdowns. Verify status, body and SSL on every probe.

Start free →Read the docs

· 12+ regions· 30s min interval· p50 / p95 / p99· SSL validation

app.sysmos.io / api-monitors / checkout-api

What you get

The essentials, none of the bloat.

Distributed

Multi-region by default

Each check runs in parallel across the regions you pick. Catch regional degradations the second they happen — not when a customer complains.

Timing

Real performance breakdown

DNS → TCP → TLS → server → transfer for every probe. See exactly where the latency lives, per region, over any time window.

Validation

Status, body, and SSL checks

Validate response codes, JSON paths, response body content, and SSL certificates. Get warned before certificates expire.

Inside the product

How it actually looks.

Per-region latency

Phase timing breakdown

Monitor configuration

Active monitors list

For your CI

API-first. Infrastructure-as-code friendly.

Everything you can do in the UI you can do via the API or Sysmos config. Drop monitors and flows into your repo and version them like the rest of your infrastructure.

POST · create monitor

POST /v1/monitors
{
  "name": "checkout-api",
  "url":  "https://api.acme.io/health",
  "method": "GET",
  "regions": ["us-east-1", "eu-west-2", "ap-south-1"],
  "interval": 30,
  "assert": {
    "status": 200,
    "max_latency_ms": 500,
    "body_contains": "ok"
  }
}

Specs

The details, on the record.

Regions

12+ global edge locations across NA, EU, APAC, SA

Min interval

30 seconds (Team plan), 10 seconds (Business)

Protocols

HTTP, HTTPS, HTTP/2

Auth

Basic, Bearer, custom headers, mTLS

Assertions

Status, latency, JSON path, regex on body, SSL expiry

Retries

Configurable per-monitor with exponential backoff

Data retention

Up to 1 year on Business plan

Better together.

Every Sysmos product shares the same workspace, team, and alert routing. No glue code, no duplicate billing.

Get api monitoring running in 5 minutes.

Free forever for one user. No credit card. Up before standup.

Start free →Book a demo