How to Monitor API Dependencies in 2026 (Complete Guide)

Originally published on API Status Check

Your application is only as reliable as its weakest API dependency.

You can write flawless code, achieve 100% test coverage, and deploy to the most reliable infrastructure—but if Stripe goes down during checkout, OpenAI rate-limits your AI features, or Auth0 blocks logins, your users experience downtime. Not your infrastructure. Theirs.

The average modern application depends on 15-20 third-party APIs. Payment processors, authentication providers, email services, SMS gateways, AI models, analytics platforms, CDNs, and more. Each one represents a potential single point of failure.

The problem? Most teams don't monitor dependencies effectively. They rely on manually checking status pages when something breaks, scrambling through Twitter for outage confirmations, or worse—learning about issues from angry customer support tickets.

This guide shows you how to build a robust API dependency monitoring strategy that catches issues before your users do.

Why API Dependency Monitoring Matters

Your App's Reliability is a Multiplication Game

If your infrastructure has 99.9% uptime and each of your 10 critical API dependencies has 99.9% uptime, your actual uptime isn't 99.9%. It's:

0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999 × 0.999
= 0.989 = 98.9% uptime

You just lost 10x more downtime to dependencies than to your own infrastructure.

The Real Cost of API Outages

When a critical dependency fails:

• Revenue loss: E-commerce sites lose an average of $5,600 per minute during payment API outages
• Customer churn: 89% of users switch to competitors after a poor experience
• Support load: Support tickets spike 300-500% during outages, overwhelming teams
• Brand damage: Public outages erode trust, especially when customers know about issues before you do
• Engineering waste: Developers spend hours debugging problems that originated in vendor infrastructure

The solution: Proactive monitoring that alerts your team to dependency issues immediately—ideally before customers are affected.

The Problem: Manual Status Page Checking Doesn't Scale

Most teams "monitor" dependencies like this:

1. Something breaks in production
2. Developer checks vendor's status page
3. Finds an ongoing incident posted 45 minutes ago
4. Posts update in Slack: "Not our fault, Stripe is down"
5. Waits for vendor to fix it

This reactive approach has serious problems:

⏰ Time lag: You discover issues 30-60 minutes after they start—often after customers complain

🔥 Alert fatigue for real users: Your customers become your monitoring system (the worst kind)

🎯 Inconsistent coverage: Only the APIs you think to check get checked. Edge dependencies stay invisible.

😫 Context switching: Developers waste time manually checking 10-15 different status pages during incidents

📊 No historical data: You can't identify patterns, unreliable vendors, or SLA violations

✋ Manual intervention: Someone has to remember to check and manually notify the team

If you're managing more than 3-4 API dependencies, manual checking is unsustainable.

5 Strategies for Monitoring API Dependencies

Effective API dependency monitoring combines multiple strategies. Here's what actually works in production:

1. Status Page Aggregation (Like API Status Check)

What it is: Monitor vendor-provided status pages in one place instead of checking each individually.

How it works: Tools like API Status Check aggregate status data from 120+ popular APIs, tracking their official status pages and incident reports in real-time.

Advantages:

• ✅ Zero configuration—no code to write
• ✅ Covers APIs you don't directly call (e.g., Cloudflare CDN issues affecting your vendors)
• ✅ Get alerts before your code detects issues
• ✅ Historical incident data for vendor reliability analysis
• ✅ No performance impact on your systems

Disadvantages:

• ⚠️ Relies on vendors posting accurate status updates (some vendors are slow to acknowledge issues)
• ⚠️ Won't detect issues specific to your account or API keys

Best for: Every team using third-party APIs. This should be your baseline.

Example: Getting Stripe status updates via RSS

<!-- Subscribe to Stripe-specific feed -->
https://apistatuscheck.com/feed/stripe

<!-- Or monitor all payment providers -->
https://apistatuscheck.com/feed/stripe
https://apistatuscheck.com/feed/paypal
https://apistatuscheck.com/feed/square

Learn more: How to get API outage alerts via RSS

2. Application-Level Health Checks

What it is: Periodically call your critical API dependencies from your application and validate responses.

How it works: Create a dedicated health check endpoint that tests each dependency with real API calls.

Example: Node.js health check endpoint

// /api/health endpoint
import { stripe } from './lib/stripe';
import { openai } from './lib/openai';
import { auth0 } from './lib/auth0';

export async function GET(request) {
  const checks = await Promise.allSettled([
    // Test Stripe
    stripe.customers.list({ limit: 1 })
      .then(() => ({ name: 'stripe', status: 'healthy' }))
      .catch(err => ({ name: 'stripe', status: 'unhealthy', error: err.message })),

    // Test OpenAI
    openai.models.list()
      .then(() => ({ name: 'openai', status: 'healthy' }))
      .catch(err => ({ name: 'openai', status: 'unhealthy', error: err.message })),

    // Test Auth0
    auth0.getUsers({ per_page: 1 })
      .then(() => ({ name: 'auth0', status: 'healthy' }))
      .catch(err => ({ name: 'auth0', status: 'unhealthy', error: err.message })),
  ]);

  const results = checks.map(c => c.value || c.reason);
  const allHealthy = results.every(r => r.status === 'healthy');

  return Response.json({
    status: allHealthy ? 'healthy' : 'degraded',
    timestamp: new Date().toISOString(),
    dependencies: results,
  }, { 
    status: allHealthy ? 200 : 503 
  });
}

Monitor this endpoint with UptimeRobot, Pingdom, or Better Stack to get alerts when dependencies fail.

Advantages:

• ✅ Detects account-specific issues (rate limits, API key problems, billing issues)
• ✅ Measures actual performance from your infrastructure
• ✅ Validates authentication and permissions

Disadvantages:

• ⚠️ Consumes API quota (use lightweight calls)
• ⚠️ Adds latency to health check endpoint
• ⚠️ Requires maintenance as dependencies change

3. Circuit Breaker Pattern

What it is: Automatically stop calling failing APIs to prevent cascading failures and give them time to recover.

How it works: Wrap API calls in a circuit breaker that tracks failure rates. After a threshold (e.g., 50% failures in 1 minute), the circuit "opens" and immediately returns cached data or friendly errors instead of making requests.

Example: Circuit breaker with Opossum library

import CircuitBreaker from 'opossum';

// Wrap your API call
const breaker = new CircuitBreaker(async (prompt) => {
  const response = await openai.chat.completions.create({
    model: 'gpt-4',
    messages: [{ role: 'user', content: prompt }],
  });
  return response.choices[0].message.content;
}, {
  timeout: 10000,        // 10-second timeout
  errorThresholdPercentage: 50,  // Open circuit at 50% errors
  resetTimeout: 30000,   // Try again after 30 seconds
  volumeThreshold: 10,   // Need at least 10 requests to calculate error rate
});

// Handle circuit states
breaker.on('open', () => {
  console.error('🔴 OpenAI circuit breaker opened - too many failures');
  // Send alert to your team
  notifyTeam('OpenAI API is failing - circuit breaker opened');
});

breaker.on('halfOpen', () => {
  console.warn('🟡 OpenAI circuit breaker half-open - testing recovery');
});

breaker.on('close', () => {
  console.log('✅ OpenAI circuit breaker closed - service recovered');
  notifyTeam('OpenAI API recovered - circuit breaker closed');
});

// Use it
try {
  const result = await breaker.fire('Explain quantum computing');
  return result;
} catch (err) {
  // Circuit is open - return fallback
  return 'AI features are temporarily unavailable. Please try again shortly.';
}

Advantages:

• ✅ Prevents cascading failures across your application
• ✅ Automatically detects failures faster than external monitoring
• ✅ Reduces load on already-struggling vendor APIs
• ✅ Provides automatic recovery detection

Disadvantages:

• ⚠️ Requires code changes for each dependency
• ⚠️ Adds complexity to your application logic
• ⚠️ Can trigger false positives during brief network hiccups

Best for: Critical dependencies where failures would cascade to multiple parts of your application.

4. Synthetic Monitoring

What it is: Simulate real user interactions with your API dependencies from multiple global locations.

How it works: Services like Pingdom, UptimeRobot, Checkly, or Datadog run scheduled tests that make HTTP requests to your APIs, checking response times, status codes, and response content.

Example: Checkly API test

// Checkly browser check - tests Stripe checkout flow
const { chromium } = require('playwright');

async function run() {
  const browser = await chromium.launch();
  const page = await browser.newPage();

  // Navigate to your checkout page
  await page.goto('https://yourapp.com/checkout');

  // Fill checkout form
  await page.fill('#email', 'test@example.com');
  await page.fill('#card-number', '4242424242424242');
  await page.fill('#expiry', '12/28');
  await page.fill('#cvc', '123');

  // Submit and check for Stripe errors
  await page.click('#submit-payment');

  // Wait for success or error
  const success = await page.waitForSelector('.payment-success', { timeout: 10000 })
    .then(() => true)
    .catch(() => false);

  if (!success) {
    const error = await page.textContent('.payment-error');
    throw new Error(`Stripe checkout failed: ${error}`);
  }

  await browser.close();
}

run();

Advantages:

• ✅ Tests real integration flows, not just API availability
• ✅ Detects configuration issues, broken webhooks, and integration problems
• ✅ Monitors from multiple geographic regions
• ✅ No performance impact on production traffic

Disadvantages:

• ⚠️ Costs money (usually $0.01-0.10 per test run)
• ⚠️ Can trigger rate limits if not configured carefully
• ⚠️ Requires test accounts with vendors

Best for: Critical payment flows, authentication, and complex multi-step API interactions.

Compare synthetic monitoring tools: Best API Monitoring Tools in 2026

5. Community Signals (Social Monitoring)

What it is: Monitor Twitter, Reddit, Hacker News, and Downdetector for real-time reports of API outages.

How it works: Many outages get reported on social media before official status pages are updated. Developers tweet frustrations, SRE teams post incident threads, and community reports on Downdetector often lead official announcements by 10-30 minutes.

Tools:

• Twitter/X search: Set up TweetDeck columns for "Stripe down", "OpenAI outage", etc.
• Downdetector: Community-driven outage tracking (but delays reporting minor issues)
• Reddit monitors: r/aws, r/stripe, r/webdev often have early reports
• Hacker News: Major outages hit the front page quickly

Advantages:

• ✅ Often faster than official status pages
• ✅ Provides context (what's breaking, which regions, workarounds)
• ✅ Free

Disadvantages:

• ⚠️ High noise-to-signal ratio
• ⚠️ Unstructured data—hard to automate alerts
• ⚠️ False positives from users with local issues

Best for: Supplementary context during incidents, not primary monitoring.

Alternative: Downdetector vs API Status Check comparison

How to Set Up Dependency Monitoring with API Status Check

Let's walk through setting up comprehensive dependency monitoring using API Status Check. This takes about 10 minutes and requires zero configuration.

Step 1: Dashboard Overview

Visit apistatuscheck.com to see real-time status for 120+ popular APIs:

• 🟢 Operational: All systems normal
• 🟡 Degraded Performance: Service running but slower than usual
• 🟠 Partial Outage: Some features down
• 🔴 Major Outage: Service completely unavailable
• ⚫ Under Maintenance: Planned downtime

Filter by category:

• Payment APIs (Stripe, PayPal, Square)
• AI/ML APIs (OpenAI, Anthropic, Google AI)
• Authentication (Auth0, Clerk, Supabase)
• Cloud Infrastructure (AWS, Google Cloud, Azure)
• Email/SMS providers
• Databases and backend services

Step 2: RSS Feeds for Your Stack

Subscribe to real-time updates for your specific dependencies:

Global feed (all APIs):

https://apistatuscheck.com/feed.xml

Per-service feeds:

https://apistatuscheck.com/feed/stripe
https://apistatuscheck.com/feed/openai
https://apistatuscheck.com/feed/auth0
https://apistatuscheck.com/feed/aws

Slack integration:

1. Add RSS app to your workspace
2. Create a dedicated #api-status channel
3. Use /feed subscribe https://apistatuscheck.com/feed/stripe
4. Repeat for each critical dependency

Discord integration:
Use a bot like MonitoRSS or RSS feeds → Create webhook via Zapier/Make.

Full guide: API Outage Alerts in Slack, Discord, and Email via RSS

Step 3: Status Badges in Your README

Show your dependencies' status directly in your repository README:

## API Dependencies Status

![Stripe Status](https://apistatuscheck.com/badge/stripe)
![OpenAI Status](https://apistatuscheck.com/badge/openai)
![Supabase Status](https://apistatuscheck.com/badge/supabase)
![Cloudflare Status](https://apistatuscheck.com/badge/cloudflare)

Badges update in real-time. When a dependency goes down, your README shows it immediately.

Learn more: Status Badges Documentation

Step 4: MCP Server for AI-Assisted Development

If you use Claude Code, Cursor, or other AI coding assistants with MCP (Model Context Protocol), install the API Status Check MCP server:

npm install -g apistatuscheck-mcp-server

Add to your MCP config (~/.config/mcp/config.json):

{
  "mcpServers": {
    "apistatuscheck": {
      "command": "apistatuscheck-mcp-server"
    }
  }
}

Now your AI assistant can check API status before suggesting code that depends on those services:

Example conversation:

You: "Why is my Stripe checkout failing in production?"

Claude: [checks API Status Check via MCP] "Stripe is currently experiencing a partial outage affecting payment processing in the US region. Started 23 minutes ago. Switching to PayPal would work as a temporary fallback."

Learn more: MCP Integrations

Step 5: Email & Webhook Alerts for Critical Dependencies

For paid plans (starting at $9/month), configure email and webhook alerts:

Email alerts:

• Get notified when your critical APIs go down
• Daily digest of status changes
• Weekly uptime reports

Webhook alerts:
Send real-time status updates to your incident management tools:

// Example webhook payload
{
  "service": "stripe",
  "status": "major_outage",
  "previous_status": "operational",
  "timestamp": "2026-02-06T15:23:10Z",
  "incident_url": "https://status.stripe.com/incidents/abc123",
  "description": "Payment processing down in US region"
}

Integration examples:

• Send to PagerDuty to trigger on-call escalation
• Post to dedicated Slack channel with @here mention
• Update internal status page automatically
• Log to incident management system

Pricing: API Status Check Pricing

Building a Dependency Health Dashboard

Want to build a custom dashboard showing your API dependencies? Here's a simple Next.js example using API Status Check's API:

// app/api/dependencies/route.js
export async function GET() {
  const dependencies = ['stripe', 'openai', 'auth0', 'supabase'];

  const statuses = await Promise.all(
    dependencies.map(async (dep) => {
      const res = await fetch(`https://apistatuscheck.com/api/status/${dep}`);
      return res.json();
    })
  );

  return Response.json({ dependencies: statuses });
}

// app/dashboard/page.jsx
'use client';
import { useEffect, useState } from 'react';

export default function DependencyDashboard() {
  const [deps, setDeps] = useState([]);

  useEffect(() => {
    const fetchStatus = async () => {
      const res = await fetch('/api/dependencies');
      const data = await res.json();
      setDeps(data.dependencies);
    };

    fetchStatus();
    const interval = setInterval(fetchStatus, 60000); // Refresh every minute
    return () => clearInterval(interval);
  }, []);

  return (
    <div className="grid grid-cols-2 gap-4 p-8">
      {deps.map(dep => (
        <div key={dep.slug} className="border rounded-lg p-4">
          <div className="flex items-center gap-3">
            <StatusIndicator status={dep.status} />
            <div>
              <h3 className="font-semibold">{dep.name}</h3>
              <p className="text-sm text-gray-600">{dep.status_text}</p>
            </div>
          </div>
          {dep.current_incident && (
            <div className="mt-3 text-sm bg-red-50 p-2 rounded">
              <strong>Active Incident:</strong> {dep.current_incident.title}
            </div>
          )}
        </div>
      ))}
    </div>
  );
}

function StatusIndicator({ status }) {
  const colors = {
    operational: 'bg-green-500',
    degraded: 'bg-yellow-500',
    partial_outage: 'bg-orange-500',
    major_outage: 'bg-red-500',
    maintenance: 'bg-gray-500',
  };

  return <div className={`w-3 h-3 rounded-full ${colors[status]}`} />;
}

Result: A real-time dashboard showing the health of your critical API dependencies, updating every minute.

Full tutorial: Build an API Status Dashboard

Best Practices for API Dependency Monitoring

1. Categorize Dependencies by Criticality

Not all API dependencies deserve the same monitoring attention:

🔴 Critical (P0):

• Payment processing (Stripe, PayPal)
• Authentication (Auth0, Clerk)
• Core product features (OpenAI for AI products)
• Action: Immediate alerts, 24/7 on-call, multiple fallbacks

🟡 Important (P1):

• Email delivery (SendGrid, Postmark)
• SMS notifications (Twilio)
• Analytics (Segment, Mixpanel)
• Action: Business hours alerts, degraded mode acceptable

🟢 Nice-to-have (P2):

• Social media integrations
• Third-party widgets
• Non-critical analytics
• Action: Daily digest, can fail silently with graceful degradation

Configure alert routing based on priority. P0 failures page on-call. P2 failures go to weekly reports.

2. Combat Alert Fatigue

The problem: Too many alerts = teams start ignoring them.

Solutions:

• Aggregate related alerts: Don't send 10 alerts for the same AWS outage
• Intelligent routing: Route low-priority alerts to Slack, high-priority to PagerDuty
• Escalation policies: Alert dev on Slack first. If not acknowledged in 10 minutes, page on-call.
• Scheduled digests: Group non-critical status changes into daily/weekly emails
• Smart thresholds: Alert on "degraded" only if it persists >5 minutes

Example escalation policy:

Stripe outage detected
├─ 0 min: Post to #engineering Slack
├─ 5 min: If not acknowledged → Send email to dev team
├─ 10 min: If not acknowledged → Page primary on-call
└─ 20 min: If not resolved → Page secondary on-call + CTO

3. Build Fallback Strategies

Monitor dependencies so you know when to activate fallbacks:

Payment processing fallbacks:

async function processPayment(amount, method) {
  // Try primary processor
  try {
    return await stripe.charges.create({ amount, source: method });
  } catch (err) {
    // Check if Stripe is down globally
    const stripeStatus = await checkStripeStatus();
    if (stripeStatus === 'major_outage') {
      // Fall back to PayPal
      return await paypal.processPayment({ amount, method });
    }
    throw err; // Account-specific issue, don't fail over
  }
}

Authentication fallbacks:

• If Auth0 is down, enable magic link email authentication
• Show maintenance mode page explaining the issue
• Allow previously authenticated users to continue using cached sessions

Content delivery fallbacks:

• If primary CDN fails, switch to secondary
• If image processing API is down, serve unprocessed images
• If AI features are unavailable, hide those UI elements gracefully

4. Monitor Cascading Failures

Many APIs depend on shared infrastructure. When AWS US-East-1 goes down, dozens of APIs fail simultaneously.

Track underlying infrastructure:

• AWS, Google Cloud, Azure status
• Cloudflare (CDN for many SaaS products)
• GitHub (authentication for developer tools)
• Stripe (payment backend for many billing systems)

Example: If AWS US-East-1 is down, you can predict that:

• Stripe might have issues (hosted on AWS)
• OpenAI might degrade (uses AWS)
• Your Vercel deployment might fail (uses AWS)

API Status Check automatically tracks infrastructure dependencies so you understand the blast radius.

5. Review Historical Patterns

Look for patterns in dependency reliability:

Questions to ask:

• Which APIs have the most frequent outages?
• Are there patterns? (e.g., every Tuesday morning during deployments)
• Which vendors consistently miss their SLA commitments?
• Are there geographic patterns? (US region more stable than EU?)

Use this data to:

• Renegotiate SLAs with unreliable vendors
• Build business cases for switching providers
• Allocate engineering time for better fallback handling
• Inform vendor selection for new dependencies

Check historical uptime: Most Reliable APIs in 2026

6. Document Your Runbooks

When a critical dependency fails at 3 AM, you need runbooks—not Slack archaeology.

Runbook template for each critical dependency:

## Stripe Outage Runbook

**Alert triggers:**
- API Status Check webhook alert
- Circuit breaker opens on payment endpoints
- Support tickets mentioning "payment failed"

**Immediate actions:**
1. Check https://status.stripe.com/
2. Check API Status Check for incident details
3. Post in #incidents: "Stripe outage confirmed - investigating"

**Fallback activation:**
1. Enable PayPal fallback in admin panel: `/admin/payments/fallback`
2. Display banner on checkout: "Stripe unavailable, using PayPal"
3. Monitor PayPal circuit breaker health

**Customer communication:**
1. Update status page: "Payment processing degraded"
2. Tweet from @company account (template: /docs/tweet-templates)
3. Email customers with open carts (template: /docs/email-templates)

**Post-incident:**
1. Log in incidents spreadsheet
2. Review customer impact metrics
3. If downtime >2 hours, request SLA credit from Stripe

Get Started with API Dependency Monitoring

The best monitoring strategy combines multiple approaches:

1. Status aggregation (API Status Check) for zero-config vendor monitoring
2. Application health checks for account-specific issue detection
3. Circuit breakers for automatic failure handling
4. Synthetic monitoring for critical user flows
5. Community signals for early warning and context

Start simple:

• Browse API Status Check to see your dependencies' current status
• Subscribe to RSS feeds for your critical APIs
• Add status badges to your README
• Set up one health check endpoint for your top 3 dependencies

Then level up:

• Configure email/webhook alerts for P0 dependencies (see pricing)
• Implement circuit breakers for critical paths
• Build runbooks for each dependency
• Review historical patterns monthly

Sign up for free alerts →

Stop learning about API outages from your customers. Start monitoring your dependencies today.

Related Resources

• Best API Monitoring Tools in 2026 - Compare monitoring solutions
• API Outage Response Guide - What to do when dependencies fail
• Understanding API SLAs - How to evaluate vendor reliability
• Most Reliable APIs in 2026 - Historical uptime data
• Cost of API Downtime - Calculate business impact