How to Use Izzi API with Cursor, Cline & Windsurf

One API key, every coding tool

Izzi API works as a drop-in replacement for OpenAI and Anthropic APIs. This means you can use it with any tool that supports custom API endpoints.

Cursor setup

Method 1: Override Base URL

1. Open Cursor → Settings → Models
2. Under "Override OpenAI Base URL", enter: https://api.izziapi.com/v1
3. Enter your API key: izzi-YOUR_KEY
4. Add models: claude-sonnet-4-20250514, gpt-5.4

Method 2: Environment variables

# Add to your shell profile (.bashrc, .zshrc)
export OPENAI_API_KEY="izzi-YOUR_KEY"
export OPENAI_BASE_URL="https://api.izziapi.com/v1"

Cline setup (VS Code)

1. Install Cline from VS Code extensions
2. Open Cline sidebar → click settings gear
3. API Provider: OpenAI Compatible
4. Base URL: https://api.izziapi.com/v1
5. API Key: izzi-YOUR_KEY
6. Model: claude-sonnet-4-20250514

Windsurf setup

1. Open Windsurf → Settings → AI
2. Custom Provider: OpenAI Compatible
3. Endpoint: https://api.izziapi.com/v1
4. API Key: izzi-YOUR_KEY
5. Default model: claude-sonnet-4-20250514

Claude Code setup

# Windows PowerShell
$env:ANTHROPIC_API_KEY = "izzi-YOUR_KEY"
$env:ANTHROPIC_BASE_URL = "https://api.izziapi.com"

# macOS / Linux
export ANTHROPIC_API_KEY="izzi-YOUR_KEY"
export ANTHROPIC_BASE_URL="https://api.izziapi.com"

# Start
claude

Recommended models per tool

Cost savings vs direct API

• 💰 First deposit: $1 → get $6 total (+$5 bonus)
• 💰 14 free models available for simple tasks
• 💰 Same model prices as official APIs — but with bonus credits
• 💰 VietQR payment — no international credit card needed

Troubleshooting

Getting 401 errors?

• Verify your key starts with izzi-
• Check base URL is exactly https://api.izziapi.com/v1
• For Claude Code, use https://api.izziapi.com (no /v1)

Model not found?

Check the exact model ID on your dashboard. Common IDs:

claude-sonnet-4-20250514
claude-opus-4-20250514
gpt-5.4
gemini-2.5-pro
gemini-2.5-flash