import requests

url = "https://{FUSION HOST}/api/realm-configs"

payload = {
    "realmType": "ldap",
    "name": "dev-ldap3",
    "enabled": True,
    "roleNames": ["developer", "admin"],
    "config": {
        "autoCreateUsers": True,
        "host": "my.fusionhost.com",
        "ssl": True,
        "port": 10636,
        "ephemeralUsers": False,
        "login": { "bindDnTemplate": "uid={},ou=users,dc=security,dc=example,dc=com" }
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "realmType": "ldap",
  "id": "ef32cba0-5340-4d73-b869-9f4faca45e10",
  "name": "dev-ldap3",
  "enabled": true,
  "createdAt": "2025-10-31T17:06:33Z",
  "config": {
    "autoCreateUsers": true,
    "host": "my.fusionhost.com",
    "ssl": true,
    "port": 10636,
    "ephemeralUsers": false,
    "login": {
      "bindDnTemplate": "uid={},ou=users,dc=security,dc=example,dc=com"
    }
  },
  "roleNames": [
    "developer",
    "admin"
  ]
}