I open-sourced every Binance and OKX 2026 fee tier as JSON (+ a calculator)
If you've ever written a backtest or a fee-aware order router for Binance or OKX, you've hit this wall: the exchanges publish their fee schedules as H…
Open Source
⚑ Report a ProblemLatest Open Source news from Tech News
All topics
AI
agents
ai
api
architecture
automation
aws
beginners
career
claude
database
devchallenge
devops
javascript
linux
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
react
security
showdev
softwareengineering
tutorial
typescript
webdev
rdev-go-api-template: Production-ready Go API Scaffolder & CLI Generator
rdev-go-api-template 🚀 The Concept A unified Go development utility that functions simultaneously as a production-ready architectural blueprint and an…
Lesson 1.3 - GraphQL for Screen Complexity and App Changes
Good morning, class! Welcome back. In our last lesson, we explored how GraphQL fundamentally addresses the issues of over-fetching and under-fetching.…
Lesson 1.2 - REST Problems and the First GraphQL Fixes
Good morning, everyone! Welcome back. In our previous lesson, we compared REST and GraphQL at a high, architectural level. Today, we are going one lay…
Sunset Your API Endpoints on Purpose: The Deprecation and Sunset Headers
Killing an API endpoint is easy. Killing it without breaking your consumers is the hard part. Most teams announce a deprecation in a blog post, send o…
How I Tamed AI API Rate Limits with a Simple Queue
A few months back, I was building a content generation tool. The idea was simple: take a list of topics, hit the OpenAI API, and get SEO-optimized art…
Cloud Architect's 2026 Guide to Cheaper, Faster LLM Inference
Cloud Architect's 2026 Guide to Cheaper, Faster LLM Inference Three months ago I opened our quarterly cloud spend dashboard and almost choked on my co…
Why AI agents can't shop today — and what we're building to change that
AI agents are getting smarter every week. They can browse the web, write code, analyze data. But there's a glaring gap in their capabilities: they can…
Building a Resilient Meta Ads Scraper: What Breaks (and What I Learned Fixing It)
When I set out to build a tool for pulling ad data from Meta's platforms, the brief I gave myself was deceptively simple: let someone search for ads b…
How I Cut AI API Costs by 65% — A Freelance Dev's 2026 Guide
How I Cut AI API Costs by 65% — A Freelance Dev's 2026 Guide Three months ago I opened my monthly invoice from a client project and nearly choked on m…
Airtable AI From Scratch: A Freelance Dev's Cost Breakdown
Airtable AI From Scratch: A Freelance Dev's Cost Breakdown I run a one-person shop. No co-founders, no VC money, no "growth team." Just me, my laptop,…
[EN] How to Organize a REST API Tree to Survive Time (and Org Chart Changes)
Also available in Spanish Before designing an endpoint, classify its nature. Only then choose its location. The Silent Problem There are many articles…
**Quick Tip: How to Choose the Right Model for Slack AI Workflows in 2026
Quick Tip: How to Choose the Right Model for Slack AI Workflows in 2026 I've been running Slack-integrated AI workflows in production for about three …
Stop hand-picking an LLM per request: a practical case for auto-routing
Most LLM features ship with the model name hardcoded. You picked it once — usually the strongest one you could justify — and now every request, trivia…
Reduce LLM Token Waste in RAG with Markdown
TL;DR Feeding raw HTML to Large Language Models wastes tokens on markup, scripts, and styling. By rendering dynamic web pages in a headless browser an…
Building an Instagram-powered app without managing scraping infrastructure
When I started building , I needed reliable access to Instagram data. Like many developers, my first instinct was to use a self-hosted solution such a…
A Korean Saju (Four Pillars) API that gets the date math right
If you have ever tried to build a Korean fortune-telling or astrology app, you already know the dirty secret: the fun part is the interpretation, and …
How I built Google Drive sync without a backend (and the 3 bugs that almost broke me)
When I started building PenPage — a privacy-first note app that stores everything in IndexedDB — I made one assumption that cost me three weeks of deb…
JWKS explained: what every developer should know
When it comes to security, certificates are used everywhere since the early days of the web. While storing them in PEM/DER format has always been comp…
How to Get an FFmpeg API Key in 60 Seconds
Originally published at ffmpeg-micro.com FFmpeg doesn't have an API. It's a command-line tool. If you want to process video from your app, you either …
I Wish I Knew AI Recommendation Sooner — Here's the Full Breakdown
So here's what happened: i Wish I Knew AI Recommendation Sooner — Here's the Full Breakdown Last quarter I burned through about three billable hours d…
REST vs GraphQL vs gRPC — Which One Should You Actually Use?
Every engineering team hits this conversation at some point. Someone proposes GraphQL. Someone else says REST is fine. A third person mentions gRPC an…
Tackling Performance Bottlenecks in Full-Stack Development: A Senior Engineer’s Guide
As a full-stack product engineer, one of the most persistent challenges I face is managing performance bottlenecks that arise between frontend, backen…
How to Track Local SEO Rankings by City with an API
Local SEO rankings are not the same everywhere. Your website may rank in position 2 in Austin, position 8 in Dallas, and not appear at all in Chicago.…
Fixing WebSocket Silent Disconnects for Financial Market Data
Intro If you work with real-time financial tick data via WebSocket long connections, you’ve probably run into frustrating hidden issues: Connections s…
How to Scrape Google Maps for Local Business Leads (with Emails) - No API Key
If you've ever needed a list of local businesses - every dentist in Manchester, every plumber in Leeds - with their contact details , you've probably …
I Tracked My AI API Costs for 30 Days. The Results Changed How I Build.
I've been shipping AI features for the past year. Last month I hit a wall — my API bill crossed $300 and I had no idea where it was going. So I did wh…
Timeouts and Circuit Breakers: Stop One Slow API From Taking Down Your Whole App
When you call another service over HTTP, you are inheriting its worst day. If that dependency slows to a crawl, every request you make to it piles up,…
How I Cut My LLM API Costs by 70% Without Touching My Code
I was staring at my AWS bill, and my stomach dropped. $214 for AI API calls last month. That's more than my hosting, my database, my entire infrastruc…
Your Automation Hits a 403 That Will Never Resolve. Now What?
What do you do when an endpoint returns 403 forever, not because of a bug, but because a human made a policy decision and the only fix is an email to …