Create subdomain

curl --request POST \
  --url https://api.fluid.app/api/domains/{domain_id}/subdomains \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "domain": {
    "hostname": "paper"
  }
}
'

import requests

url = "https://api.fluid.app/api/domains/{domain_id}/subdomains"

payload = { "domain": { "hostname": "paper" } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({domain: {hostname: 'paper'}})
};

fetch('https://api.fluid.app/api/domains/{domain_id}/subdomains', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.fluid.app/api/domains/{domain_id}/subdomains",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'domain' => [
        'hostname' => 'paper'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.fluid.app/api/domains/{domain_id}/subdomains"

	payload := strings.NewReader("{\n  \"domain\": {\n    \"hostname\": \"paper\"\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.fluid.app/api/domains/{domain_id}/subdomains")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"domain\": {\n    \"hostname\": \"paper\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fluid.app/api/domains/{domain_id}/subdomains")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"domain\": {\n    \"hostname\": \"paper\"\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "subdomain": {
    "id": 48227,
    "hostname": "paper.dundermifflin.com",
    "apex_domain": "dundermifflin.com",
    "verification_status": "pending_shared",
    "primary": false,
    "wildcard_subdomain": false,
    "redirection_domain_id": null,
    "certificate_domain_id": 48213,
    "company_id": 1405,
    "verifying_cname": false,
    "created_at": "2026-09-21T09:12:44Z",
    "updated_at": "2026-09-21T09:12:44Z",
    "redirection_domain_hostname": null,
    "dns_config": {},
    "payment_account": null,
    "dns_fluid_verified": "pending",
    "has_subdomains": true,
    "connected": false,
    "cert_created": true
  },
  "meta": {
    "request_id": "3f9c1a7e-5b2d-4c8e-9a61-2d7f0b4e8c13",
    "timestamp": "2026-09-21T09:12:45Z"
  }
}

{
  "subdomain": {
    "id": 48227,
    "hostname": "paper.dundermifflin.com",
    "apex_domain": "dundermifflin.com",
    "verification_status": "pending_shared",
    "primary": false,
    "wildcard_subdomain": false,
    "redirection_domain_id": null,
    "certificate_domain_id": 48213,
    "company_id": 1405,
    "verifying_cname": false,
    "created_at": "2026-09-21T09:12:44Z",
    "updated_at": "2026-09-21T09:12:44Z",
    "redirection_domain_hostname": null,
    "dns_config": {},
    "payment_account": null,
    "dns_fluid_verified": "pending",
    "has_subdomains": true,
    "connected": false,
    "cert_created": true
  },
  "meta": {
    "request_id": "3f9c1a7e-5b2d-4c8e-9a61-2d7f0b4e8c13",
    "timestamp": "2026-09-21T09:12:45Z"
  }
}

{
  "message": "<string>",
  "error": "<string>",
  "error_message": "<string>",
  "errors": "<string>",
  "meta": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z",
    "code": "<string>",
    "blocked_date": "2026-11-30",
    "blocked_day": 30,
    "allowed_date": "2026-11-28",
    "scheduled_date": "2026-12-10",
    "last_bill_date": "2026-11-10",
    "requested_date": "2026-11-30",
    "payment_uuid": "<string>",
    "error_details": [
      {
        "code": "<string>",
        "field": "<string>",
        "payment": "not_attempted",
        "message": "<string>"
      }
    ],
    "coded_recovery": true
  }
}