import requests

url = "https://api.rebase.energy/platform/v2/sites/{site_id}/capacity"

payload = { "data": [
        {
            "valid_time": "2024-09-15T00:00Z",
            "value": 6000
        },
        {
            "valid_time": "2024-09-18T12:00Z",
            "value": 12000
        },
        {
            "valid_time": "2024-09-24T12:00Z",
            "value": 6000
        }
    ] }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "errors": [
    {
      "field": "<string>",
      "message": "<string>"
    }
  ]
}