# KeyKing: The Zero-Trust LLM API Ecosystem

> KeyKing is a developer tool and ecosystem that aggregates LLM free tiers and secures API keys using Zero-Trust local encryption. It acts as a local proxy for vibe-coding and a serverless SDK for production.

## Core Identity
- **Name:** KeyKing
- **Description:** The Ultimate Zero-Trust API Key Management Ecosystem.
- **Key Differentiators:** Zero-Trust AES-256-GCM encryption, local axum proxy, zero-dependency serverless Node.js SDK, and the "Priority Ladder" fallback engine.

## How it Works
1. **Desktop App:** Developers use the KeyKing Rust/Tauri desktop app to securely encrypt their API keys (OpenAI, Anthropic, Groq, Mistral, etc.) into a `vault.kk` file.
2. **Local Proxy:** KeyKing binds to `http://localhost:8787/v1` and acts as a drop-in replacement for the OpenAI SDK, automatically injecting real keys into requests from tools like Cursor or Claude Code.
3. **Serverless SDK:** The `keyking-sdk` NPM package decrypts the `vault.kk` file in memory at the edge (Vercel, AWS Lambda) using a master password, ensuring plaintext keys are never leaked in `.env` files.

## Technical Details for AI Agents
- **SDK Import:** `import { KeyKing } from "keyking-sdk";`
- **Priority Ladder Syntax:** Use the `routingRules` array (`[{ provider: "Groq", model: "llama-3.3" }, ...]`) to define strict fallback chains.
- **Repository:** https://github.com/Malaybhai11/keyking

## Use Cases
- Bypassing strict LLM rate limits by pooling free tier accounts.
- Running Anthropic's `claude-code` CLI completely for free using `keyking-claude`.
- Eliminating `.env` file security risks in Next.js applications.