curl --request POST \
  --url https://app.yampi.ai/api/v1/accounts/{account_id}/custom_attribute_definitions \
  --header 'Content-Type: application/json' \
  --header 'api_access_token: <api-key>' \
  --data '
{
  "attribute_display_name": "Custom Attribute",
  "attribute_display_type": 0,
  "attribute_description": "This is a custom attribute",
  "attribute_key": "custom_attribute",
  "attribute_values": [
    "value1",
    "value2"
  ],
  "attribute_model": 0,
  "regex_pattern": "^[a-zA-Z0-9]+$",
  "regex_cue": "Please enter a valid value"
}
'

const options = {
  method: 'POST',
  headers: {api_access_token: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    attribute_display_name: 'Custom Attribute',
    attribute_display_type: 0,
    attribute_description: 'This is a custom attribute',
    attribute_key: 'custom_attribute',
    attribute_values: ['value1', 'value2'],
    attribute_model: 0,
    regex_pattern: '^[a-zA-Z0-9]+$',
    regex_cue: 'Please enter a valid value'
  })
};

fetch('https://app.yampi.ai/api/v1/accounts/{account_id}/custom_attribute_definitions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.yampi.ai/api/v1/accounts/{account_id}/custom_attribute_definitions"

payload = {
    "attribute_display_name": "Custom Attribute",
    "attribute_display_type": 0,
    "attribute_description": "This is a custom attribute",
    "attribute_key": "custom_attribute",
    "attribute_values": ["value1", "value2"],
    "attribute_model": 0,
    "regex_pattern": "^[a-zA-Z0-9]+$",
    "regex_cue": "Please enter a valid value"
}
headers = {
    "api_access_token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "id": 123,
  "attribute_display_name": "<string>",
  "attribute_display_type": "<string>",
  "attribute_description": "<string>",
  "attribute_key": "<string>",
  "regex_pattern": "<string>",
  "regex_cue": "<string>",
  "attribute_values": "<string>",
  "attribute_model": "<string>",
  "default_value": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>"
}

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