# Api Key Chain
> Instantly validate API keys for 19+ AI and developer providers — OpenAI, Anthropic, Google Gemini, DeepSeek, xAI, Groq, Stripe, and more. Open source, secure, and free.

## Core Pages

- Home: https://apikeychain.app/
  Test any API key instantly. Auto-detect provider, bulk testing, instant results.

- Features: https://apikeychain.app/features
  Full feature list: 19 providers, auto-detection, bulk testing, endpoint viewer, response viewer, test history, zero-knowledge encryption, health checks, and more.

- Pricing: https://apikeychain.app/pricing
  Free forever core features. Premium at $4.99/month for saved keys vault, cloud analytics, health checks, priority support.

- Contact: https://apikeychain.app/contact
  Report bugs or request features.

## Open Source

- GitHub Repository: https://github.com/UsmanSanawar/Api-Key-Chain
  MIT licensed. Full source code available. Contributions welcome.

## Supported Providers (19 total)

| Provider | Key Format |
|----------|-----------|
| OpenAI | `sk-proj-...`, `sk-...` |
| Anthropic | `sk-ant-...` |
| Google Gemini | `AIza...` (35 chars) |
| DeepSeek | `sk-...` (32 hex) |
| xAI (Grok) | `xai-...` |
| Groq | `gsk_...` |
| Cohere | `co_...` |
| Mistral AI | Manual selection |
| OpenRouter | `sk-or-...` |
| Together | Manual selection |
| Perplexity | `pplx-...` |
| Hugging Face | `hf_...` (34+ chars) |
| GLM (ZhiPu AI) | Manual selection |
| Kimi (Moonshot) | Manual selection |
| Qwen (Alibaba) | Manual selection |
| Doubao (ByteDance) | Manual selection |
| Stripe | `sk_test_...`, `sk_live_...` |
| SendGrid | `SG....` |
| GitHub | `ghp_...`, `github_pat_...` |

## Technical Details

- **Encryption**: Zero-knowledge (AES-256-GCM + PBKDF2-SHA256, 600K iterations) or Server-Encrypted (envelope encryption with Supabase Vault)
- **Architecture**: Fully client-side — keys sent directly to provider APIs from the browser
- **Stack**: React 19, TypeScript, Vite 7, Tailwind CSS 4, Zustand
- **Auth**: Supabase Auth (email + Google OAuth)
- **Billing**: Polar.sh (monthly subscriptions)
- **License**: MIT

## Full Content

For the complete site content in markdown format, see:
- https://apikeychain.app/llms-full.txt