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POST
/
customdomains
Create custom domain
curl --request POST \
  --url https://api.blaxel.ai/v0/customdomains \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "metadata": {
    "displayName": "Preview Domain",
    "labels": {},
    "name": "preview.example.com",
    "workspace": "<string>"
  },
  "spec": {
    "cnameRecords": "<string>",
    "fallbackPreviewId": "my-fallback-preview",
    "region": "us-pdx-1",
    "subjectAlternativeNames": [
      {}
    ],
    "txtRecords": {}
  }
}
'
import requests

url = "https://api.blaxel.ai/v0/customdomains"

payload = {
"metadata": {
"displayName": "Preview Domain",
"labels": {},
"name": "preview.example.com",
"workspace": "<string>"
},
"spec": {
"cnameRecords": "<string>",
"fallbackPreviewId": "my-fallback-preview",
"region": "us-pdx-1",
"subjectAlternativeNames": [{}],
"txtRecords": {}
}
}
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({
metadata: {
displayName: 'Preview Domain',
labels: {},
name: 'preview.example.com',
workspace: '<string>'
},
spec: {
cnameRecords: '<string>',
fallbackPreviewId: 'my-fallback-preview',
region: 'us-pdx-1',
subjectAlternativeNames: [{}],
txtRecords: {}
}
})
};

fetch('https://api.blaxel.ai/v0/customdomains', 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.blaxel.ai/v0/customdomains",
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([
'metadata' => [
'displayName' => 'Preview Domain',
'labels' => [

],
'name' => 'preview.example.com',
'workspace' => '<string>'
],
'spec' => [
'cnameRecords' => '<string>',
'fallbackPreviewId' => 'my-fallback-preview',
'region' => 'us-pdx-1',
'subjectAlternativeNames' => [
[

]
],
'txtRecords' => [

]
]
]),
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.blaxel.ai/v0/customdomains"

payload := strings.NewReader("{\n \"metadata\": {\n \"displayName\": \"Preview Domain\",\n \"labels\": {},\n \"name\": \"preview.example.com\",\n \"workspace\": \"<string>\"\n },\n \"spec\": {\n \"cnameRecords\": \"<string>\",\n \"fallbackPreviewId\": \"my-fallback-preview\",\n \"region\": \"us-pdx-1\",\n \"subjectAlternativeNames\": [\n {}\n ],\n \"txtRecords\": {}\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.blaxel.ai/v0/customdomains")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"metadata\": {\n \"displayName\": \"Preview Domain\",\n \"labels\": {},\n \"name\": \"preview.example.com\",\n \"workspace\": \"<string>\"\n },\n \"spec\": {\n \"cnameRecords\": \"<string>\",\n \"fallbackPreviewId\": \"my-fallback-preview\",\n \"region\": \"us-pdx-1\",\n \"subjectAlternativeNames\": [\n {}\n ],\n \"txtRecords\": {}\n }\n}")
.asString();
require 'uri'
require 'net/http'

url = URI("https://api.blaxel.ai/v0/customdomains")

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 \"metadata\": {\n \"displayName\": \"Preview Domain\",\n \"labels\": {},\n \"name\": \"preview.example.com\",\n \"workspace\": \"<string>\"\n },\n \"spec\": {\n \"cnameRecords\": \"<string>\",\n \"fallbackPreviewId\": \"my-fallback-preview\",\n \"region\": \"us-pdx-1\",\n \"subjectAlternativeNames\": [\n {}\n ],\n \"txtRecords\": {}\n }\n}"

response = http.request(request)
puts response.read_body
{
  "metadata": {
    "createdAt": "<string>",
    "updatedAt": "<string>",
    "createdBy": "<string>",
    "updatedBy": "<string>",
    "displayName": "Preview Domain",
    "labels": {},
    "name": "preview.example.com",
    "workspace": "<string>"
  },
  "spec": {
    "cnameRecords": "<string>",
    "fallbackPreviewId": "my-fallback-preview",
    "lastVerifiedAt": "<string>",
    "region": "us-pdx-1",
    "status": "verified",
    "subjectAlternativeNames": [
      {}
    ],
    "txtRecords": {},
    "verificationError": "<string>"
  }
}

Authorizations

Authorization
string
header
required

OAuth2 authentication with JWT tokens

Body

application/json

Custom domain for preview deployments The custom domain represents a base domain (e.g., example.com) that will be used to serve preview deployments. Each preview will be accessible at a subdomain: .preview. (e.g., abc123.preview.example.com)

metadata
object
required

Custom domain metadata

spec
object
required

Custom domain specification

Response

200 - application/json

successful operation

Custom domain for preview deployments The custom domain represents a base domain (e.g., example.com) that will be used to serve preview deployments. Each preview will be accessible at a subdomain: .preview. (e.g., abc123.preview.example.com)

metadata
object
required

Custom domain metadata

spec
object
required

Custom domain specification

Last modified on July 1, 2026