developer-tools

Found 141 articles tagged with "developer-tools"

How to Enable CORS in Express and Next.js

CORS is enabled on the server, not the browser. Working Express, FastAPI and Next.js configs, how preflight works, and the six errors Chrome prints, with fixes.

DevToolLab Team·October 9, 2026

Latest Articles

Tutorial

8 min

How to Spot AI Crawlers in Server Logs

Search your access log for GPTBot, ClaudeBot and PerplexityBot, then check each IP against the vendors' published ranges. Includes a Python script and output.

DevToolLab Team·October 9, 2026

How to Verify HubSpot Webhook Signatures

Tutorial

8 min

How to Verify HubSpot Webhook Signatures

HubSpot signs webhooks with HMAC SHA-256 over method, URL, body and timestamp. A tested Node.js verifier, a Python cross-check and the pitfalls behind 401s.

DevToolLab Team·October 9, 2026

Best HubSpot Alternatives for Developers

Guide

11 min

Best HubSpot Alternatives for Developers

HubSpot, Attio, Twenty, Close and EspoCRM compared on published API limits, webhooks, licenses and per-seat prices, plus how long a 50,000-record sync takes.

DevToolLab Team·October 9, 2026

81–90 of 141

Guide

11 min read

Claude Code Git Worktrees: Run 5 AI Agents in Parallel (2026 Guide)

Claude Code's git worktrees let you run multiple AI coding sessions in parallel without file conflicts. Here's the --worktree flag, .worktreeinclude, and subagent isolation, explained with working commands and this week's fixes.

DevToolLab Team·July 23, 2026

A2A Protocol Explained: 150+ Companies Backed It in a Year, Here's What It Actually Solves

Guide

9 min read

A2A Protocol Explained: 150+ Companies Backed It in a Year, Here's What It Actually Solves

A2A crossed 150 supporting organizations and 22,000 GitHub stars in its first year under the Linux Foundation. Here's what the Agent2Agent protocol actually does, how it differs from MCP, and a working Python example for when you genuinely need it.

DevToolLab Team·July 19, 2026

Guide

8 min read

LLM Structured Outputs: Get JSON That Always Parses (2026 Guide)

Anthropic shipped Structured Outputs in February 2026, so every major LLM can now return JSON that matches your schema. Here's how schema-constrained generation works, the JSON Schema rules that break it, and code you can run today.

DevToolLab Team·July 19, 2026

Local-First Apps in 2026: How CRDTs Resolve Conflicts

Guide

9 min read

Local-First Apps in 2026: How CRDTs Resolve Conflicts

ElectricSQL rebranded to Electric in 2026 and PowerSync ships to production. Here's how CRDTs actually resolve conflicts in local-first apps, with tested code and real output.

DevToolLab Team·July 13, 2026

Security

8 min read

Only 8.5% of MCP Servers Use OAuth: A Practical Security Guide for 2026

An October 2025 audit of 5,205 MCP servers found only 8.5% use OAuth. Here's what the spec actually requires, why real breaches trace back to this gap, and how to add OAuth 2.1 with working code.

DevToolLab Team·July 13, 2026

Security

14 min read

Non-Human Identity Security: Your API Keys Outnumber Your Employees 80 to 1

OWASP just shipped its first Non-Human Identity Top 10. Your API keys, service accounts, and AI agents outnumber your employees 80 to 1, and almost none of them have an owner. Here's the fix, with real code.

DevToolLab Team·July 4, 2026

Guide

13 min read

Post-Quantum Cryptography Migration: A 2026 Developer's Guide

Post-quantum cryptography migration guide: what NIST's ML-KEM and ML-DSA standards mean, what's already in production, and Node.js + OpenSSL code to run today.

DevToolLab Team·July 3, 2026

Guide

10 min read

LLM Evals in 2026: A Practical Guide to Testing Your AI App

LLM apps break silently - a changed prompt, a model update, and your outputs drift without an assertion firing. This guide covers the three eval types, a working Python harness, LLM-as-judge, and CI integration.

DevToolLab Team·July 2, 2026

AI-Powered Webhook Handlers: Smart Event Processing for Developers in 2026

Tutorial

9 min read

AI-Powered Webhook Handlers: Smart Event Processing for Developers in 2026

Learn how to build AI-powered webhook handlers that classify events, extract structured data, auto-generate responses, and detect anomalies - with real code examples in Node.js and Python.

DevToolLab Team·July 1, 2026