Authentication

# In .env file
GATEWAY_SKIP_AUTH=1

# In .env file
GATEWAY_SKIP_AUTH=0

sk_test_1234567890abcdef    # Test keys
sk_live_1234567890abcdef    # Production keys

# Create a test API key (run from repo root)
make seed-api-key

# Output
✅ Test API key created. Use 'sk_test_123456' for testing.
Note: Authentication is disabled by default (GATEWAY_SKIP_AUTH=1)

curl -X POST http://localhost:8080/api/v1/keys \
  -H "X-Admin-Token: admin-secret" \
  -d '{
    "name": "My Application",
    "user_id": "user-123"
  }'

X-RateLimit-Limit: 60
X-RateLimit-Remaining: 45
X-RateLimit-Reset: 1730001234

HTTP/1.1 429 Too Many Requests
Retry-After: 30

{
  "error": "Rate limit exceeded",
  "message": "Too many requests. Please retry after the rate limit window resets."
}

import time
import requests
from requests.exceptions import HTTPError

def submit_with_retry(query, max_retries=3):
    for attempt in range(max_retries):
        try:
            response = requests.post(
                "http://localhost:8080/api/v1/tasks",
                headers={"X-API-Key": "sk_test_123456"},
                json={"query": query}
            )
            response.raise_for_status()
            return response.json()

        except HTTPError as e:
            if e.response.status_code == 429:
                retry_after = int(e.response.headers.get('Retry-After', 60))
                print(f"Rate limited. Retrying after {retry_after}s...")
                time.sleep(retry_after)
            else:
                raise

    raise Exception("Max retries exceeded")

curl -X POST http://localhost:8080/api/v1/tasks \
  -H "X-API-Key: sk_test_123456" \
  -H "X-Tenant-ID: org-acme" \
  -H "Content-Type: application/json" \
  -d '{"query": "Process data"}'

package shannon.auth

import future.keywords.if

# Default deny
default allow = false

# Allow if user has valid API key and appropriate permissions
allow if {
    input.api_key_valid
    input.user.team in ["engineering", "data-science"]
    input.task.mode in allowed_modes[input.user.team]
}

# Team-specific allowed modes
allowed_modes := {
    "engineering": ["simple", "standard", "complex"],
    "data-science": ["standard", "complex"]
}

# Token budget limits by team
max_tokens[team] := 50000 if team == "data-science"
max_tokens[team] := 10000 if team == "engineering"

policy:
  enabled: true
  mode: "enforce"  # dry-run, enforce, off
  path: "/app/config/opa/policies"
  fail_closed: false  # Allow on policy errors

package shannon.models

# Only allow specific models per team
allowed_models[user.team] contains model if {
    user.team == "cost-sensitive"
    model in ["gpt-5-mini", "claude-haiku"]
}

allowed_models[user.team] contains model if {
    user.team == "premium"
    model in ["gpt-5-thinking", "claude-opus", "gpt-5", "claude-sonnet"]
}

# Create new key
make seed-api-key

# Update applications with new key
# Revoke old key after migration

import os
from shannon import ShannonClient

client = ShannonClient(
    base_url=os.environ["SHANNON_BASE_URL"],
    api_key=os.environ["SHANNON_API_KEY"],
)

# config/shannon.yaml
gateway:
  tls:
    enabled: true
    cert_file: "/path/to/cert.pem"
    key_file: "/path/to/key.pem"

# Requests per API key
sum by (api_key_id) (rate(shannon_gateway_requests_total[5m]))

# Errors by API key
sum by (api_key_id) (rate(shannon_gateway_errors_total[5m]))

# config/shannon.yaml
gateway:
  ip_whitelist:
    enabled: true
    allowed_ips:
      - "10.0.0.0/8"
      - "192.168.1.100"