Datetime

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-5.2",
  "tools": [
    {
      "type": "openrouter:datetime"
    }
  ],
  "messages": [
    {
      "role": "user",
      "content": "How many days are left until the end of this quarter?"
    }
  ]
}'