curl --request PATCH \
  --url https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/tracking_codes \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <x-api-key>' \
  --data '
{
  "tracking_codes": {
    "ga_code": "G-ABC123XYZ",
    "gtm_code": "GTM-ABC123",
    "pixel_id": "123456789012345"
  }
}
'

const options = {
  method: 'PATCH',
  headers: {'X-Api-Key': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    tracking_codes: {ga_code: 'G-ABC123XYZ', gtm_code: 'GTM-ABC123', pixel_id: '123456789012345'}
  })
};

fetch('https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/tracking_codes', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://{your-subdomain}.neetoform.com/api/external/v2/forms/{form_id}/tracking_codes"

payload = { "tracking_codes": {
        "ga_code": "G-ABC123XYZ",
        "gtm_code": "GTM-ABC123",
        "pixel_id": "123456789012345"
    } }
headers = {
    "X-Api-Key": "<x-api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "tracking_codes": {
    "ga_code": "G-ABC123XYZ",
    "gtm_code": null,
    "pixel_id": "123456789012345"
  }
}

{
  "error": "<string>"
}

{
  "error": "Form does not exist."
}

{
  "error": "Ga code is invalid"
}