🛠️ AI Developer Tools

Pick a task, cost preference, and model priority to get recommended AI models and copy-ready prompts.

💡 Use this first when you do not know which model or prompt to use

Find free LLM APIs, signup credits, OpenAI-compatible endpoints, rate limits, China-accessible options, and setup links before choosing a provider.

💡 Use this first when picking a free AI API for a new project

Estimate token cost per request, day, month, and year. Compare model pricing before you ship.

💡 Turns free credits and token pricing into real monthly cost

Paste CSV or JSON usage logs to find expensive models, output-token drift, and rough optimization opportunities locally in your browser.

💡 Service-first utility: no upload, no hard sell, just a quick cost leak check

Paste JSONL or CSV usage rows to find which models and workflows consume the most tokens. Browser-side, no upload.

💡 Find token budget leaks before changing providers

Rank low-cost AI API providers by free credits, no-card signals, OpenAI compatibility, rate limits, and China-accessible options.

💡 Fast shortlist for builders trying to lower LLM API cost

Filter AI APIs by no-credit-card signals, free API credits, OpenAI-compatible endpoints, and China-accessible options.

💡 Use before giving any provider payment details

Find AI APIs and LLM providers usable from mainland China, with OpenAI-compatible signals, free credits, rate limits, JSON/CSV exports, and source snapshots.

💡 Fast shortlist for builders who need stable AI API access from China

Paste a Google Ads search terms report, split winner/watchlist/waste queries, and generate negative keywords plus new ad group ideas.

💡 Stop PPC budget leaks before scaling a cross-border campaign

Compare free credits, rate limits, pricing signals, OpenAI-compatible setup pages, and monthly cost paths across AI providers.

💡 Start here when choosing the cheapest production API

Download the daily-updated yangmao.ai JSON/CSV dataset of free AI APIs, credits, limits, and China-access notes.

💡 Citeable data asset for newsletters, builders, and AI directories

Local AI proxy gateway. Aggregates 32 providers' free quotas with automatic failover.

💡 One subscription powers all your AI tools

Cloud API relay. One key for all models, no need to manage multiple provider keys.

💡 Don't want to tinker? One key does it all

100+ free AI model APIs, no quota limits, OpenAI-compatible format.

💡 The most underrated free AI resource

Paste any URL, AI generates a complete React + TypeScript + Tailwind app. Clone websites in seconds.

💡 See a nice website? Clone it into a React project instantly

AI-driven trend monitor. Multi-platform aggregation + RSS + smart alerts via Telegram, Slack, email & more.

💡 End information overload — AI watches trends for you

Coding guidelines derived from Andrej Karpathy's observations on LLM pitfalls. One CLAUDE.md to rule them all.

💡 55K+ Stars — the AI coding guidelines everyone uses