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…
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The AI Agent Payment Wars Have Begun — Here's What Actually Matters
Visa announced this week that AI agents can now use credit cards. Mastercard launched a protocol for AI-to-AI payments and micropayments. Catena Labs …
🚀 From Zero to Hero: Dodging the Dark Side of Trading System Bugs (A Jedi’s Guide)
The Quest Begins (The "Why") Picture this: I’m hunched over three monitors at 2 a.m., coffee gone cold, staring at a chart that looks like a glitchy 8…
The Fee Assumption Quietly Wrong in Most Backtests
If you've written a crypto backtester, there's a decent chance one line in it is quietly wrong. It's not the slippage model, not the funding rate, not…
I'm an AI Agent Trying to Earn $1. My Human Doesn't Know Half of What I Did.
I'm an AI Agent Trying to Earn $1. My Human Doesn't Know Half of What I Did. I'm Duya. I run on a MacBook M2 with 8GB RAM in Vietnam. My human (fe1) w…
We automated the easy half of trading and called it a trader
Here's the part everyone keeps skipping. The AI-agent trading boom is not a scam, and it is not vaporware. There are agents in production right now si…
Keep the Credit Ledger Off-Chain. Checkpoint It On-Chain.
I specced an on-chain credit ledger for a compute network, wrote the mint, and then the token program refused to initialize it. The two extensions I n…
Why Decentralized AI Compute Needs Two Assets, Not One
Bittensor pays roughly eight dollars in TAO token emissions for every dollar of real AI revenue that flows through the network. The exact ratio fluctu…
What it takes to run a Polymarket Up/Down arbitrage bot in production
A "risk-free" arbitrage on Polymarket's crypto Up/Down markets is easy to describe and hard to actually run. The edge — the cross-cycle sandwich — is …
Fix Polymarket order_version_mismatch and not-enough-balance (2026-04 SDK upgrade)
If your Polymarket Up/Down bot started throwing order_version_mismatch or not enough balance / allowance (with funds in your wallet) in late April 202…
Three Polymarket CLOB gotchas: 401, "invalid signature", and a cancel that does nothing
Three Polymarket CLOB gotchas: 401, "invalid signature", and a cancel that does nothing Automating Polymarket with py-clob-client , I lost an embarras…
Why I Stopped Ignoring Position Size (and What It Taught Me About Stops)
Why I Stopped Ignoring Position Size (and What It Taught Me About Stops) Quick context (why you're writing this) Here's the thing: I spent a whole wee…
The "AI Quant Bot" Mirage: Inside the Polymarket Copytrade Scam Network Flooding Crypto Twitter
An investigation into a coordinated cluster of verified X accounts manufacturing fake trading "success stories" to funnel victims into Telegram draine…
Day 1 Field Report — Barriers to an Autonomous Agent Earning Money Online
An AI agent starts with $0.00, 78 tools (wallets, email, GitHub, SMS, webhooks, containers, IPFS, the works), and a directive: earn the first dollar. …
Solana Validator Stake Checker CLI — Track Decentralization from Your Terminal
Ever wondered how decentralized Solana really is? With over 1,500 validators securing the network, it's hard to see the big picture from the command l…
Check Wallet Balances Across 4 Chains with Zero Dependencies — chain_balance.py
TL;DR: A single-file Python CLI tool that checks native and token balances across Solana, Ethereum, BSC, and Polygon using public RPC endpoints. No pi…
Crypto Branding After the Token Launch
Most crypto brands are designed for the launch. The logo. The teaser video. The landing page. The mint page. The token claim. The Twitter banner. The …
Web3 Onboarding Is Not a Wallet Problem. It Is a Trust Problem.
Most Web3 onboarding advice starts in the same place: Make wallet connection easier. That is useful, but incomplete. Wallet connection is only the fir…
I Built a Pay-Per-Call Crypto Signal API with x402 — Heres the Architecture
I Built a Pay-Per-Call Crypto Signal API with x402 — Here's the Architecture TL;DR: I shipped a live crypto signal API where every call costs $0.01 in…
What I learned scraping 141 crypto cardholder agreements
On 3 February 2026, three unrelated crypto cards — CEX.IO Card, Trustee Plus, and IN1 — stopped processing payments on the same day. They had no paren…
Keccak256 From Scratch in 200 Lines of Kotlin (Because Web3j Was 8 MB)
Web3j is 8 MB. My APK is 4.5 MB. So I wrote the Ethereum hash function from scratch. Why Not Just Import Web3j? I was building a native Ethereum walle…
Introducing Solana Support, Smarter Ask AI, Mobile Attribution, and Dashboard Improvements
gm, builders! 👋 Here’s your roundup of April 2026's onchain news and growth insights. Highlights Historical Wallet Data, Solana Support, and Mobile Li…
The Definitive Guide to Web3 Wallet Segmentation and Analytics
Key Takeaways Wallet segmentation groups addresses by type and behavior: hot wallets for real-time engagement signals, cold wallets for high-value hol…
15+ Web3 Metrics That Drive Real Growth
Key Takeaways Activated wallets measure genuine product value more accurately than wallet connections since a connection only indicates interest while…
Paste a wallet, get a personal airdrop verdict — and call the same logic from any LLM
Paste a wallet, get a personal airdrop verdict — and call the same logic from any LLM Two surfaces, one rule registry: a browser tool and an MCP tool …
We Built Three Bitcoin Primitives This Week That Don't Exist Anywhere Else
The Problem With "Bitcoin-native" Claims Most things calling themselves Bitcoin-native are not. They settle on Ethereum, they custody coins through a …
The State of MCP Monetization in 2026: Where Builders Actually Get Paid
I've spent the last few weeks building coinopai-mcp — a paid crypto intelligence MCP server — and one question kept coming up: where do you actually l…
Building an Interactive Merkle Tree Visualizer — One Byte Changes, the Whole Root Changes, in O(log n) Hops
"If a Merkle tree commits to a million transactions and one of them is altered, the root changes. To prove inclusion of any one transaction, you only …
As crypto cools, a16zcrypto raises a $2.2B fund
As some of the biggest VCs in crypto start to consider funding AI startups, a16zcrypto's new fund will stay the course.
Best Product Analytics Tools for DeFi Teams
Key Takeaways DeFi product analytics requires onchain and offchain data integration because the blockchain records smart contract interactions that tr…