Authentication

NutritionSignals uses API keys for authentication. Add your key as a Bearer token in the Authorization header on every request.

Get an API key

Generate your API key from your developer settings. Keep it private — anyone with the key can make requests on your account.

Best practices

• Store keys in environment variables (e.g. .env.local)
• Never ship keys to the browser or mobile apps
• Rotate keys immediately if you suspect a leak

Bearer token (recommended)

Send your API key in the Authorization header:

curl https://api.nutritionsignals.com/v1/foods/resolve \
  -H "Authorization: Bearer {API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{"text":"Chobani Greek Yogurt, strawberry, 5.3 oz"}'