JSON Content Checker & Validator - API Testing Tool

Validate JSON content, check API responses, monitor data quality, and detect schema changes automatically. Perfect for API testing, QA automation, and continuous monitoring.

🚀 Key Features

• Multiple Validation Types - Structure, schema, content, or all checks
• API Response Testing - Monitor API endpoints for correctness
• Performance Monitoring - Track response times
• Data Quality Checks - Detect nulls, empty strings, duplicates
• Custom Validation Rules - Define your own validation logic
• Automated Reporting - Get detailed error and warning reports
• Batch Processing - Check multiple endpoints at once

💡 Use Cases

• API Testing - Validate API responses in CI/CD pipelines
• Data Quality Monitoring - Ensure data integrity
• Schema Validation - Detect breaking changes in APIs
• QA Automation - Automated testing of JSON endpoints
• Monitoring - Continuous validation of production APIs
• Integration Testing - Verify third-party API contracts

Included features

• Apify SDK - toolkit for building Actors
• Crawlee - web scraping and browser automation library

How it works

This template is useful when you're already familiar with the Apify SDK and Crawlee and want to start with a clean slate. It does not include puppeteer or playwright so install them manually and update the Dockerfile if you need them.

Resources

• Node.js tutorials in Academy
• Video guide on getting data using Apify API
• Integration with Make, GitHub, Zapier, Google Drive, and other apps
• A short guide on how to create Actors using code templates:

Getting started

For complete information see this article. To run the Actor use the following command:

$apify run

Deploy to Apify

Connect Git repository to Apify

If you've created a Git repository for the project, you can easily connect to Apify:

1. Go to Actor creation page
2. Click on Link Git Repository button

Push project on your local machine to Apify

You can also deploy the project on your local machine to Apify without the need for the Git repository.

1. Log in to Apify. You will need to provide your Apify API Token to complete this action.

   $apify login
   

2. Deploy your Actor. This command will deploy and build the Actor on the Apify Platform. You can find your newly created Actor under Actors -> My Actors.

   $apify push
   

Documentation reference

To learn more about Apify and Actors, take a look at the following resources:

• Apify SDK for JavaScript documentation
• Apify SDK for Python documentation
• Apify Platform documentation
• Join our developer community on Discord

Quick start

Store page: https://apify.com/scrappy_garden/json-content-checker

Paste this into Input and click Run:

{
  "urls": [
    {
      "url": "https://api.example.com/data"
    }
  ]
}

Outputs (what you get)

• Dataset: Dataset items typically include fields like: url, isValid, status, responseTime, errors, warnings, checkedAt.
• Key-value store: SUMMARY

Tips (trust + predictable results)

• Start with 1–3 URLs to validate behavior, then scale up.
• If a target blocks requests, enable Proxy and/or slow down concurrency in Input.
• Use the SUMMARY / REPORT keys (when present) for automation pipelines and monitoring.

Related actors

• broken-link-checker (https://apify.com/scrappy_garden/broken-link-checker)
• canonical-url-checker (https://apify.com/scrappy_garden/canonical-url-checker)
• meta-tag-analyzer (https://apify.com/scrappy_garden/meta-tag-analyzer)
• security-headers-checker (https://apify.com/scrappy_garden/security-headers-checker)

Search keywords

json content checker, json content checker & validator - api testing tool, website audit, seo