Plesk api example:

Add customer:

curl -u admin:5KZlqnnOiobn61c@ -X POST "https://peopleadmin.tuke.sk/api/v2/clients" -H  "accept: application/json" -H  "Content-Type: application/json" -d "{  \"name\": \"Martin Hasin\",  \"company\": \"UVT\",  \"login\": \"mh476nd\",  \"status\": 0,  \"email\": \"martin.hasin@tuke.sk\",  \"locale\": \"en-US\",  \"owner_login\": \"admin\",  \"external_id\": \"link:12345\",  \"description\": \"Martin Hasin customer\",  \"password\": \"changeme1Q**\",  \"type\": \"customer\"}"

JSON:

{
  "name": "John Smith",
  "company": "Plesk",
  "login": "john-unit-test",
  "status": 0,
  "email": "john_smith@msn.com",
  "locale": "en-US",
  "owner_login": "admin",
  "external_id": "link:12345",
  "description": "Nice guy",
  "password": "changeme1Q**",
  "type": "reseller"
}

Domain ADD:

curl -u admin:5KZlqnnOiobn61c@ -X POST "https://peopleadmin.tuke.sk/api/v2/domains" -H  "accept: application/json" -H  "Content-Type: application/json" -d "{  \"name\": \"qwerty5.domena3.lab1.tuke.sk\",  \"description\": \"Martin Hasin website\",  \"hosting_type\": \"virtual\",  \"hosting_settings\": {    \"ftp_login\": \"mh476nd_ftp5\",    \"ftp_password\": \"changeme1Q**\"  }, \"owner_client\": {       \"login\": \"mh476nd\"  },  \"ip_addresses\": [    \"147.232.16.52\" ],  \"plan\": {    \"name\": \"people\"  }}"