Requestes URL not found

POST → http://157.546.48/api/contacts/new

json body:
{
“firstname”:“firstname”,
“ipAddress”:“Ipaddress”,
“lastname”:“lastname”,
“email”:“email”
}

and return:

{
“errors”: [
{
“message”: “Requested URL not found: /api/contacts/new”,
“code”: 404,
“type”: null
}
]
}

Please, anyone to help me to solv this problem?

Steps I have tried to fix the problem :

Please clear the Mautic cache after you’ve enabled the API, and try again. Most folks find this addresses the problem.