IsItDev — Developer Tutorials for Automation, AI Agents & APIs

A close-up of a terminal screen showing JSON webhook payloads from GoHighLevel automations in a modern developer workspace.

GoHighLevel Automations: Guide to Advanced CRM Workflows

Standard CRM workflows often limit your automation capabilities. Learn how to build custom webhook listeners and scale your GoHighLevel automations with Node.js.

Whiteboard showing a clean, feature-driven project folder structure design with path mappings

How to Setup the Best Folder Structure for Your Next Project

by Fahim | Developers

Scaffold a clean, scalable folder structure designed for modern Next.js and Node.js applications. This hands-on guide walks you through directory organization, path aliases, and build-time optimization.

Terminal screen showing HTTP requests with idempotency headers and status codes in a server room

Build a Redis-Backed Idempotency Middleware for Express

by Fahim | Developers

Duplicate API requests can corrupt database state and trigger duplicate transactions. Learn how to build a production-ready, Redis-backed idempotency middleware for Express to safely lock and replay API requests.

Secure GoHighLevel webhook listener terminal logs showing incoming POST requests

Build a Secure GoHighLevel Webhook Listener with Node.js

by Fahim | Developers

Exposing raw webhook endpoints to GoHighLevel integrations can lead to security vulnerabilities and server crashes. This step-by-step guide shows you how to build a production-grade Node.js listener with validation and deduplication.

Docker Compose terminal logs showing n8n successfully connected to PostgreSQL database

Self-Host n8n with PostgreSQL: Production Docker Guide

by Fahim | Cloud & Hosting

Stop relying on SQLite for production automation. Learn how to deploy a scalable, self-hosted n8n instance backed by a dedicated PostgreSQL database using Docker Compose.

Redis terminal output showing commands used by BullMQ for queue rate limiting.

How to Handle External API Rate Limits with BullMQ and Redis

by Fahim | Developers

Flooding external APIs with concurrent requests triggers 429 errors that drop payloads and crash integrations. This guide shows you how to build a distributed rate-limiting queue using BullMQ and Redis to throttle outgoing traffic cleanly.

Terminal window running a concurrent HTTP POST benchmark test against a Google Apps Script webhook endpoint

Prevent Race Conditions in Google Apps Script Webhooks

by Fahim | Developers

Incoming concurrent webhooks can cause silent data loss in Google Sheets. Learn how to use LockService to serialize requests and ensure thread-safe writes.

Dual monitor setup showing Google Sheets data syncing to a Discord channel via Webhooks

Send Google Sheets Data to Discord: Apps Script Tutorial

by Fahim | Developers

Automating data pipelines from Google Sheets to Discord keeps teams aligned without manual copy-pasting. This developer guide shows you how to write, deploy, and optimize an Apps Script webhook integration.

Python code and GoHighLevel dashboard displaying automated lead enrichment metrics

Connect CrewAI to GoHighLevel API: Automated Lead Enrichment Guide

by Fahim | Artificial Intelligence

Incoming marketing leads often lack basic firmographic data, forcing sales reps to spend hours manually digging through company websites. This step-by-step guide shows you how to build a CrewAI agent that automatically enriches GoHighLevel contacts using custom API tools.

A developer desk setup showing Google Sheets syncing data to GoHighLevel API on a laptop screen

Sync Google Sheets to GoHighLevel with Apps Script API v2

by Fahim | Developers

Build a production-ready sync engine to move contacts from Google Sheets to GoHighLevel using Google Apps Script and API v2. This guide provides complete code, auth token management, and optimization steps.