How to Monitor Your REST APIs

Practical guide for monitoring the availability and performance of your endpoints.

APIs are the heart of many modern applications. A failing API can block an entire service.

This guide shows you how to configure effective monitoring for your API endpoints.

Types of APIs to Monitor

MoniTao can monitor different types of APIs:

  • REST API - Standard GET, POST, PUT, DELETE endpoints
  • Health Checks - /health or /status endpoints of your services
  • Third-party APIs - Services you depend on (Stripe, Twilio...)

Configuration

Configure your API monitor in a few steps:

Step 1: Choose the Endpoint

Select an endpoint representative of your API's health (ideally a health check).

Step 2: Configure Authentication

If your API requires authentication, add the necessary headers:

# Exemple de configuration avec header d'authentification
URL: https://api.example.com/v1/health
Method: GET
Headers:
  Authorization: Bearer YOUR_API_TOKEN
  Content-Type: application/json

Step 3: Validate the Response

Optionally, verify the response contains expected text like "healthy" or "ok".

Content Validation

Beyond HTTP 200 code, validate response content to detect application errors:

# Reponse API typique
{
  "status": "healthy",
  "version": "2.1.0",
  "uptime": 99.9
}

# Texte a verifier: "healthy" ou "status"

Monitoring Scenarios

  • Health check endpoint that must return "healthy"
  • Payment API that must be available 24/7
  • Third-party API you depend on for your service

Summary

  1. Create a monitor for your API endpoint
  2. Configure authentication headers if needed
  3. Add content validation for more reliability

Frequently Asked Questions

Can I monitor a private (non-public) API?

MoniTao monitors publicly accessible endpoints. For internal APIs, use heartbeat.

How to monitor an API with OAuth authentication?

Use a Bearer token in the headers. Make sure the token has a long lifespan.

Can I send POST requests to test my API?

Currently, MoniTao performs GET requests. Use a dedicated health endpoint.

How to monitor a GraphQL API?

Create a monitor for the GraphQL endpoint with content validation.

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