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Quick Start

Get started with the CTGT API in 3 simple steps:
  1. Sign up and verify your email
  2. Get your API key
  3. Make your first request

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Step 1: Create Your Account

Create your account with email verification: 
curl -X POST https://api.ctgt.ai/v1/auth/signup \
  -H "Content-Type: application/json" \
  -d '{
    "name": "John Doe",
    "email": "john@example.com",
    "organization": "Acme Corp"
  }'
Response: 
{
  "message": "Account created successfully. Please check your email to verify your account.",
  "email": "john@example.com"
}

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Step 2: Verify Your Email

Check your inbox for a verification email containing a link like: 
https://api.ctgt.ai/v1/auth/verify?token=VERIFICATION_TOKEN
Click the link or make a GET request: 
curl "https://api.ctgt.ai/v1/auth/verify?token=VERIFICATION_TOKEN"
Response: 
{
  "message": "Email verified successfully!",
  "email": "john@example.com",
  "api_key": "sk-ctgt-abc123def456..."
}
Save your API key! You’ll need it for all API requests. Store it securely and never share it publicly.

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Step 3: Make Your First Request

Now you can start making API requests using your API key: 
curl -X POST https://api.ctgt.ai/v1/chat/completions \
  -H "Authorization: Bearer sk-ctgt-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-2.5-flash",
    "messages": [
      {"role": "user", "content": "Hello! What can you help me with?"}
    ]
  }'
Response: 
{
  "id": "chatcmpl-123",
  "object": "chat.completion",
  "created": 1702847123,
  "model": "gemini-2.5-flash",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! I'm here to help you with a wide range of tasks..."
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 15,
    "completion_tokens": 42,
    "total_tokens": 57
  }
}

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What’s Included with Free Tier

Upon signup, you immediately get access to:

3 Free Models

  • Gemini 2.5 Flash
  • Gemini 2.5 Flash Lite
  • Claude Haiku 4.5

Generous Rate Limits

  • 20 requests/minute
  • 100 requests/hour
  • 500 requests/day
  • 100K tokens/day

Pay-as-you-go Pricing

Only pay for what you use Starting at $0.30 per 1M tokens

Production Ready

Full API access Streaming support No credit card required

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Next Steps

Explore Models

Learn about all 10 available models and their pricing

Upgrade to Paid

Unlock all models and 100x higher rate limits

Advanced Features

Streaming, custom prompts, temperature control, and more

Code Examples

Complete SDKs in Python, JavaScript, and more

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Authentication

All API requests require authentication using a Bearer token: 
Authorization: Bearer YOUR_API_KEY
Your API key:
  • Starts with sk-ctgt-
  • Is unique to your account
  • Should be kept secure and never shared
  • Can be regenerated if compromised
Store your API key as an environment variable:
export CTGT_API_KEY="sk-ctgt-YOUR_API_KEY"

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Base URL

All API endpoints are accessed through: 
https://api.ctgt.ai

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Need Help?

API Reference

Detailed endpoint documentation

Check Health

GET /health

Contact Sales

Enterprise support available