API

While running Binance quant strategies on AWS Singapore, I ran into a series of “IP-related” pitfalls: geographic restrictions, API rate limiting, and account risk control freezes. The ultimate solution was to use IPRoyal residential IPs as the exit for API calls. This article lays out the principles and configuration in detail. IP Problems You’ll Hit with Quant Strategies Problem 1: Binance restricts API access from certain countries Binance blocks API access via IPs from the US, UK, Netherlands, and other regions: ...

💡 China users: Binance’s official site can’t be accessed directly from mainland China—you’ll need your own networking tools. Fiat deposits don’t support bank cards; the main method is C2C (USDT↔CNY) channels. The Binance API is your gateway to quantitative trading. If you want your strategy to execute automatically—auto buy, auto stop-loss, auto position monitoring—you need the API. ...

Anthropic’s current flagship models are Opus 4.6 (most powerful), Sonnet 4.6 (balanced), and Haiku 4.5 (fastest and cheapest). Many people use Claude for everything with Opus, resulting in API bills 3–5× higher. This article explains from a practical usage perspective: when to use Opus, when to use Sonnet, and when Haiku is worth considering. Pricing Comparison (April 2026) Model Input Price Output Price Relative Cost claude-haiku-4-5 $0.80/M tokens $4/M tokens 1× claude-sonnet-4-6 $3/M tokens $15/M tokens ~4× claude-opus-4-6 $15/M tokens $75/M tokens ~19× Opus costs nearly 20× more than Haiku. For the same task, using Opus when Sonnet can handle it is pure waste. ...

💡 Mainland China Notice: Binance.com isn’t directly accessible from mainland China; you’ll need a VPN or network tool. Fiat on-ramps don’t support bank cards directly; the primary route is C2C (USDT↔CNY) trading. One of the biggest risks in live quant trading isn’t strategy losses—it’s a leaked API Key leading to account theft. Accidentally pushing your key to GitHub, a VPS getting compromised, or logs being exposed can wipe your account clean instantly. Any single mistake can be catastrophic. ...

Claude API costs can easily spiral out of control—stronger models cost more per call, and longer context costs more. This post shares my approach to cost control. Claude Model Pricing Comparison (2026) Model Input $/MTok Output $/MTok Use case claude-opus-4-6 $15 $75 Complex reasoning, code generation claude-sonnet-4-6 $3 $15 General tasks, writing claude-haiku-4-5 $0.8 $4 Simple classification, summarization MTok = million tokens. 1 token ≈ 0.75 English words ≈ 0.5 Chinese characters. ...