curl --request POST \
  --url https://app.fliqr.ai/api/accounts/custom_fields \
  --header 'Content-Type: application/json' \
  --header 'X-ACCESS-TOKEN: <api-key>' \
  --data '
{
  "name": "lead_score",
  "type": 1
}
'

const options = {
  method: 'POST',
  headers: {'X-ACCESS-TOKEN': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({name: 'lead_score', type: 1})
};

fetch('https://app.fliqr.ai/api/accounts/custom_fields', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.fliqr.ai/api/accounts/custom_fields"

payload = {
    "name": "lead_score",
    "type": 1
}
headers = {
    "X-ACCESS-TOKEN": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "id": 1995,
  "name": "lead_score"
}