APAC Synthetic Monitoring Guide 2026: Checkly, Catchpoint, and Apica for SRE Teams

Why APAC Teams Need Synthetic Monitoring Beyond APM

APAC engineering teams that rely solely on application performance monitoring (APM) and error rate dashboards operate with a reactive visibility gap: APM detects failures after APAC users are already experiencing them. A broken APAC checkout flow that fails only for Safari on iOS, an APAC API endpoint that times out for requests originating from the Telkomsel network in Indonesia, or an APAC login page that returns HTTP 200 with a blank body — these failures may not spike error rates or infrastructure metrics, but they are invisible to APAC users attempting to use the application.

Synthetic monitoring proactively simulates APAC user behaviour from outside the APAC application — running scripted browser flows and API calls on a schedule from global network locations, detecting failures and degradation before APAC end users encounter them.

Three platforms cover the APAC synthetic monitoring spectrum:

Checkly — code-first synthetic monitoring using Playwright browser checks and API monitors, managed as code via CLI and Terraform for APAC DevOps teams.

Catchpoint — enterprise digital experience monitoring from 2,200+ global nodes covering web, API, DNS, CDN, and BGP layers for APAC SRE teams.

Apica — unified platform combining continuous synthetic monitoring with periodic load testing from shared APAC test scripts.

APAC Synthetic Monitoring Fundamentals

What synthetic monitoring detects vs APM

APAC APM (reactive — detects after users are affected):
  - APAC server-side error rates (5xx responses)
  - APAC database query latency
  - APAC service-to-service timeout rates
  - APAC infrastructure resource utilization

APAC Synthetic monitoring (proactive — detects before users):
  - APAC browser rendering failures (blank pages, JS errors)
  - APAC user flow breakage (login → cart → checkout)
  - APAC third-party dependency failures (payment provider, auth)
  - APAC DNS resolution failures
  - APAC CDN cache poisoning or origin fallback issues
  - APAC SSL certificate expiry (days before expiry)
  - APAC geographic availability gaps (works in SG, fails in ID)

APAC synthetic check types

APAC API monitor:
  → HTTP GET/POST/PUT to APAC endpoint
  → Assert: status code 200, response time <500ms
  → Assert: JSON body contains {"status": "ok"}
  → Run: every 1 minute from APAC-region PoP

APAC Browser check (Playwright):
  → Navigate to https://apac-app.com/login
  → Fill APAC test user credentials
  → Click login button
  → Assert: redirected to /dashboard within 3 seconds
  → Assert: "Welcome, APAC User" text visible
  → Run: every 5 minutes from SG + TH + ID + PH nodes

APAC Multi-step API flow:
  → POST /auth/token → extract APAC bearer token
  → GET /apac/account with token → assert APAC account data
  → POST /apac/payment → assert APAC payment reference returned
  → Run: every 2 minutes from APAC PoP

Checkly: APAC Monitoring as Code

Checkly browser check — APAC Playwright user flow

// checks/apac-checkout-flow.check.ts
// Checkly Playwright browser check — APAC checkout user flow

import { test, expect } from '@playwright/test';

test('APAC checkout user flow', async ({ page }) => {
    // APAC: Navigate to product page
    await page.goto('https://apac-shop.com/products/apac-enterprise-plan');
    await expect(page).toHaveTitle(/APAC Enterprise Plan/);

    // APAC: Add to cart
    await page.click('[data-testid="apac-add-to-cart-btn"]');
    await expect(page.locator('[data-testid="apac-cart-count"]')).toHaveText('1');

    // APAC: Proceed to checkout
    await page.click('[data-testid="apac-checkout-btn"]');
    await page.waitForURL('**/checkout**');

    // APAC: Fill billing details
    await page.fill('[name="apac_company_name"]', 'APAC Test Corp Pte Ltd');
    await page.fill('[name="apac_email"]', '[email protected]');
    await page.selectOption('[name="apac_country"]', 'SG');

    // APAC: Assert payment form loaded (Stripe iframe present)
    await expect(page.frameLocator('[title="Secure payment"]')
        .locator('[placeholder="Card number"]')).toBeVisible();

    // APAC: Assert total price displayed correctly
    await expect(page.locator('[data-testid="apac-order-total"]'))
        .toContainText('SGD');
});

Checkly CLI — APAC monitoring as code deployment

# APAC: Deploy checks as code with Checkly CLI

# Install Checkly CLI
npm install -g checkly

# APAC: Verify checks before deployment
checkly test --record

# APAC: Deploy monitoring checks to Checkly platform
checkly deploy

# APAC output:
# Deploying checks...
# ✓ apac-checkout-flow.check.ts → "APAC checkout user flow"
#   Locations: ap-southeast-1 (Singapore), ap-northeast-1 (Tokyo)
#   Schedule: every 5 minutes
# ✓ apac-payment-api.check.ts → "APAC payment API health"
#   Locations: ap-southeast-1, ap-southeast-2 (Sydney)
#   Schedule: every 1 minute
# ✓ apac-auth-flow.check.ts → "APAC auth token endpoint"
#   Schedule: every 2 minutes
# 3 checks deployed successfully

Checkly Terraform — APAC infrastructure as code integration

# terraform/monitoring/apac-checks.tf
# APAC: Define Checkly monitors alongside infrastructure

resource "checkly_check" "apac_payment_api" {
  name                      = "APAC Payment API Health"
  type                      = "API"
  activated                 = true
  frequency                 = 1  # every 1 minute
  double_check              = true
  ssl_check                 = true
  use_global_alert_settings = false

  locations = [
    "ap-southeast-1",  # Singapore
    "ap-northeast-1",  # Tokyo
    "ap-southeast-2",  # Sydney
  ]

  request {
    url              = "https://api.apac-app.com/health"
    follow_redirects = true
    assertion {
      source     = "STATUS_CODE"
      comparison = "EQUALS"
      target     = "200"
    }
    assertion {
      source     = "JSON_BODY"
      property   = "$.status"
      comparison = "EQUALS"
      target     = "ok"
    }
    assertion {
      source     = "RESPONSE_TIME"
      comparison = "LESS_THAN"
      target     = "500"  # APAC: max 500ms response time
    }
  }

  alert_channel_subscription {
    channel_id = checkly_alert_channel.apac_pagerduty.id
    activated  = true
  }
}

Catchpoint: APAC Enterprise Digital Experience Monitoring

Catchpoint monitoring layers — APAC full stack visibility

Catchpoint APAC monitoring stack:

Layer 1: APAC Web Performance
  → Browser-level Chromium test from APAC nodes
  → Core Web Vitals: LCP, FID, CLS for APAC UX scoring
  → Waterfall chart: which APAC resource is slow?
  → Third-party: payment gateway, auth provider, CDN assets

Layer 2: APAC API Monitoring
  → HTTP request/response from APAC nodes
  → Multi-step flows with token extraction
  → Response content assertion
  → APAC error tracking by region

Layer 3: APAC DNS Monitoring
  → Resolution time from 50+ APAC resolvers
  → Record propagation after APAC DNS changes
  → NXDOMAIN / hijacking detection

Layer 4: APAC CDN Monitoring
  → Cache hit ratio from APAC edge nodes
  → APAC origin fallback detection
  → CDN-to-CDN performance comparison

Layer 5: APAC BGP / Internet Monitoring
  → Real-time APAC routing change detection
  → ISP outage early warning (before APAC users complain)
  → APAC network path analysis (traceroute automation)

Catchpoint APAC SLA reporting

Catchpoint APAC Monthly SLA Report
Period: 2026-04 | Service: APAC Customer Portal

APAC Availability Summary:
  Global availability: 99.94%
  APAC-region availability: 99.97%
  Degraded periods: 2h14m (planned maintenance: 1h30m + incident: 44m)

APAC Performance Summary:
  Average response time (Singapore): 187ms  ← APAC P1 target: <300ms ✓
  Average response time (Jakarta): 312ms    ← APAC P1 target: <300ms ✗ [flag]
  Average response time (Tokyo): 198ms      ← APAC P1 target: <300ms ✓
  P95 response time (Singapore): 394ms

APAC Incident Analysis:
  2026-04-08 14:32-15:16 (44 min): APAC CDN origin timeout
  Root cause: APAC S3 origin misconfiguration after release 4.2.1
  Detection: Catchpoint alert at 14:33 (1 min after onset)
  User impact: 3,400 APAC sessions affected

APAC SLA compliance: 99.94% vs 99.9% contractual target ✓

Apica: APAC Unified Synthetic and Load Testing

Apica synthetic monitor — APAC script reuse

// APAC Apica script: reused for both synthetic monitoring and load testing

// In synthetic monitoring mode: runs every 2 minutes from APAC PoPs
// In load testing mode: scaled to 500 concurrent APAC virtual users

async function apacCheckoutMonitor(context) {
    const apacBase = 'https://apac-app.com';

    // Step 1: APAC login
    const apacAuthResponse = await context.http.post(
        `${apacBase}/api/auth/token`,
        {
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({
                username: context.vars.apac_test_user,
                password: context.vars.apac_test_password,
            }),
        }
    );

    context.assert.statusCode(apacAuthResponse, 200);
    const apacToken = apacAuthResponse.json.access_token;

    // Step 2: APAC get product catalog
    const apacCatalogResponse = await context.http.get(
        `${apacBase}/api/products?region=apac`,
        {headers: {'Authorization': `Bearer ${apacToken}`}}
    );
    context.assert.statusCode(apacCatalogResponse, 200);
    context.assert.responseTime(apacCatalogResponse, 300);  // APAC: <300ms

    // Step 3: APAC place order
    const apacOrderResponse = await context.http.post(
        `${apacBase}/api/orders`,
        {
            headers: {'Authorization': `Bearer ${apacToken}`},
            body: JSON.stringify({
                product_id: apacCatalogResponse.json.products[0].id,
                apac_region: 'sg',
            }),
        }
    );
    context.assert.statusCode(apacOrderResponse, 201);
    context.assert.jsonPath(apacOrderResponse, '$.order_id', (id) => id.startsWith('APAC-'));
}

APAC Synthetic Monitoring Tool Selection

APAC Synthetic Monitoring Need        → Tool         → Why

APAC code-first monitoring (DevOps)   → Checkly       Playwright checks;
(monitor-as-code, CI/CD integration) →               Terraform provider;
                                                      APAC developer-native

APAC enterprise SLA monitoring        → Catchpoint    2,200+ global nodes;
(DNS, CDN, BGP, web + API)           →               full-stack APAC layers;
                                                      compliance reporting

APAC unified monitor + load test      → Apica         Same APAC scripts both;
(QA teams, script reuse)             →               continuous + periodic;
                                                      APM correlation

APAC simple API uptime checks         → Checkly/      Lightweight APAC API
(no browser, just HTTP)              → Grafana Cloud  monitors; APAC native
                                      → Synthetic     Grafana integration

APAC real user monitoring (RUM)       → Datadog RUM   Actual APAC user data;
(complement to synthetic)            → / Sentry       complements APAC
                                                      synthetic baseline

Related APAC SRE and Observability Resources

For the AIOps and observability platforms (Datadog, Splunk, Prometheus) that synthetic monitoring alerts feed into for correlation with APAC infrastructure metrics, see the APAC AIOps and observability guide.

For the incident management tools (OpsGenie, VictorOps, Incident.io) that receive Checkly and Catchpoint alerts for APAC on-call escalation, see the APAC incident management guide.

For the load testing tools (k6, Gatling, Artillery) that validate APAC application performance before production while Checkly monitors it continuously, see the APAC load testing guide.