curl --request POST \
  --url https://fexmetrics-fivem-redm-server-analytics-api3.p.rapidapi.com/rapid/v1/compare \
  --header 'Content-Type: application/json' \
  --header 'X-RapidAPI-Key: <api-key>' \
  --data '
{
  "servers": [
    {
      "identifier": "public-fivem",
      "by": "id"
    },
    {
      "identifier": "cfx-history",
      "by": "cfxId"
    }
  ]
}
'

const options = {
  method: 'POST',
  headers: {'X-RapidAPI-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    servers: [
      {identifier: 'public-fivem', by: 'id'},
      {identifier: 'cfx-history', by: 'cfxId'}
    ]
  })
};

fetch('https://fexmetrics-fivem-redm-server-analytics-api3.p.rapidapi.com/rapid/v1/compare', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://fexmetrics-fivem-redm-server-analytics-api3.p.rapidapi.com/rapid/v1/compare"

payload = { "servers": [
        {
            "identifier": "public-fivem",
            "by": "id"
        },
        {
            "identifier": "cfx-history",
            "by": "cfxId"
        }
    ] }
headers = {
    "X-RapidAPI-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "range": "30d",
  "data": [
    {
      "serverId": "public-fivem",
      "cfxId": "cfx-public",
      "range": "30d",
      "currentPlayers": 80,
      "averagePlayers": 42.7,
      "medianPlayers": 41,
      "peakPlayers": 91,
      "lowestPlayers": 6,
      "growth": {
        "players": 12.4,
        "percentage": 39.7
      },
      "uptime": null,
      "sampleCount": 2880
    },
    {
      "serverId": "history-redm",
      "cfxId": "cfx-history",
      "range": "30d",
      "currentPlayers": 40,
      "averagePlayers": 37.2,
      "medianPlayers": 37,
      "peakPlayers": 65,
      "lowestPlayers": 10,
      "growth": {
        "players": 8.1,
        "percentage": 27.8
      },
      "uptime": null,
      "sampleCount": 2880
    }
  ]
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "Invalid request"
  }
}

{
  "error": {
    "code": "RAPIDAPI_UNAUTHORIZED",
    "message": "Unauthorized"
  }
}

{
  "error": {
    "code": "FEATURE_NOT_AVAILABLE",
    "message": "Feature not available for this subscription"
  }
}

{
  "error": {
    "code": "SERVER_NOT_FOUND",
    "message": "Server not found"
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}