Getting Started with Izzi API in 5 Minutes

What is Izzi API?

Izzi API is a unified AI gateway that gives you access to 38+ AI models — including Claude Opus 4, GPT-5, Gemini 2.5, and Grok 3 — through a single API key. Pay-as-you-go with 14 free models included.

Why developers choose Izzi API

• ✅ One API key — access Claude, GPT, Gemini, Llama, DeepSeek and more
• ✅ 14 free models — Qwen3 235B, Llama 3.3, DeepSeek R1 at zero cost
• ✅ OpenAI + Anthropic compatible — drop-in replacement, no code changes
• ✅ $1 minimum deposit — get +$5 bonus on first top-up
• ✅ VietQR + Crypto payments — no Visa/Mastercard required
• ✅ Balance never expires

Step 1: Create your account

1. Go to izziapi.com
2. Sign in with Google (one click)
3. You're in! Free tier is instantly active.

Step 2: Get your API key

1. Open Dashboard → API Keys
2. Click "Create New Key"
3. Copy your key (starts with izzi-)

Step 3: Make your first API call

Using curl

curl https://api.izziapi.com/v1/chat/completions \
  -H "Authorization: Bearer izzi-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-20250514",
    "messages": [{"role": "user", "content": "Hello from Izzi API!"}]
  }'

Using Python

from openai import OpenAI

client = OpenAI(
    api_key="izzi-YOUR_KEY",
    base_url="https://api.izziapi.com/v1"
)

response = client.chat.completions.create(
    model="claude-sonnet-4-20250514",
    messages=[{"role": "user", "content": "Hello!"}]
)

print(response.choices[0].message.content)

Using Node.js

import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: 'izzi-YOUR_KEY',
  baseURL: 'https://api.izziapi.com/v1',
});

const response = await client.chat.completions.create({
  model: 'claude-sonnet-4-20250514',
  messages: [{ role: 'user', content: 'Hello from Node.js!' }],
});

console.log(response.choices[0].message.content);

Step 4: Try a free model

Switch the model to any free model — no credits needed:

curl https://api.izziapi.com/v1/chat/completions \
  -H "Authorization: Bearer izzi-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "qwen3.6-plus-free",
    "messages": [{"role": "user", "content": "What is quantum computing?"}]
  }'

Available free models

Step 5: Top up for premium models

• 💳 VietQR — scan QR code from any Vietnamese bank app
• 🪙 Crypto — BTC, ETH, USDT accepted
• 💰 $1 minimum — get +$5 bonus on first deposit
• 📊 1 credit = $1 — simple pricing, no hidden fees

What's next?

• 📖 Read the API docs for full endpoint reference
• 🧰 Set up Cursor, Cline, or Windsurf with Izzi API
• 💰 Learn 7 ways to reduce API costs
• 🆓 Explore all 14 free models