GPTKit is a unified backend designed to provide tools via HTTP Actions for Custom GPTs.

All endpoints require Bearer token authentication. The GPTKIT_BEARER_TOKEN environment variable must be set for the API to function (unless disabled in development mode).

When calling the API, include the Bearer token in the Authorization header:

curl -H "Authorization: Bearer your-token-here" \
 "https://gptkit.guillaumeduveau.com/domain/whois?domain=example.com"

Use a .env file with Docker Compose (see Deployment section):

# .env
GPTKIT_BEARER_TOKEN=your-secret-token-here

For local development, you can disable authentication:

export GPTKIT_DISABLE_AUTH=1
uvicorn app.main:app --reload

Or set the token normally:

export GPTKIT_BEARER_TOKEN="your-secret-token-here"
uvicorn app.main:app --reload

Allows checking domain name availability and retrieving WHOIS information.

• Endpoint: GET /domain/whois
• Parameters:
  • domain (required): The domain name to check (e.g., google.com).
  • refresh (optional): 1 to force a fresh WHOIS lookup (ignores cache).
• Features:
  • Persistent cache (SQLite).
  • Rate limiting (global and per domain).
  • Automatic availability parsing for major TLDs.

Here is an example docker-compose.yml configuration to deploy GPTKit.

Note: The image is available on GHCR. Make sure to replace your-username with your GitHub username.

services:
 gptkit:
 image: ghcr.io/your-username/gptkit:latest
 restart: unless-stopped
 ports:
 - "8000:8000"
 environment:
 - GPTKIT_BEARER_TOKEN=${GPTKIT_BEARER_TOKEN}
 volumes:
 # Data persistence (WHOIS cache stored in /app/data/whois_cache.db)
 - gptkit_data:/app/data
volumes:
 gptkit_data:

Create a .env file in the same directory as docker-compose.yml (see .env.example for reference):

# .env (do not commit this file!)
GPTKIT_BEARER_TOKEN=your-secret-token-here

Docker Compose will automatically load variables from the .env file or from the host environment.

Security: Never commit the .env file to version control. It's already in .gitignore. Copy .env.example to .env and set your values.

1. Installation:

   pip install -r requirements.txt

2. Run:

   uvicorn app.main:app --reload

3. Tests:

• Quick API smoke test (curl):

  # Without authentication (if GPTKIT_BEARER_TOKEN is not set)
  curl "http://localhost:8000/domain/whois?domain=example.com"
  # With authentication
  curl -H "Authorization: Bearer your-token-here" \
   "http://localhost:8000/domain/whois?domain=example.com"

• Run the unit test suite with pytest (from the project root):

  # activate your virtualenv if you have one, e.g.:
  source venv/bin/activate
  # install test/dev dependencies if needed
  pip install -r requirements.txt
  # run all tests
  pytest -q
  # run a single test file
  pytest tests/test_whois_parsing.py -q