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POST
/
assets
/
{assetId}
/
blocks
Create a block
curl --request POST \
  --url https://versuno.ai/api/public/assets/{assetId}/blocks \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "block": {
    "type": "paragraph",
    "content": "New block text",
    "meta": {}
  }
}
'
import requests

url = "https://versuno.ai/api/public/assets/{assetId}/blocks"

payload = { "block": {
"type": "paragraph",
"content": "New block text",
"meta": {}
} }
headers = {
"Authorization": "<api-key>",
"Content-Type": "application/json"
}

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

print(response.text)
const options = {
method: 'POST',
headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({block: {type: 'paragraph', content: 'New block text', meta: {}}})
};

fetch('https://versuno.ai/api/public/assets/{assetId}/blocks', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));
package main

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

func main() {

url := "https://versuno.ai/api/public/assets/{assetId}/blocks"

payload := strings.NewReader("{\n \"block\": {\n \"type\": \"paragraph\",\n \"content\": \"New block text\",\n \"meta\": {}\n }\n}")

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

req.Header.Add("Authorization", "<api-key>")
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))

}
<?php

$curl = curl_init();

curl_setopt_array($curl, [
CURLOPT_URL => "https://versuno.ai/api/public/assets/{assetId}/blocks",
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([
'block' => [
'type' => 'paragraph',
'content' => 'New block text',
'meta' => [

]
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: <api-key>",
"Content-Type: application/json"
],
]);

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

curl_close($curl);

if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
require 'uri'
require 'net/http'

url = URI("https://versuno.ai/api/public/assets/{assetId}/blocks")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"block\": {\n \"type\": \"paragraph\",\n \"content\": \"New block text\",\n \"meta\": {}\n }\n}"

response = http.request(request)
puts response.read_body
HttpResponse<String> response = Unirest.post("https://versuno.ai/api/public/assets/{assetId}/blocks")
.header("Authorization", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"block\": {\n \"type\": \"paragraph\",\n \"content\": \"New block text\",\n \"meta\": {}\n }\n}")
.asString();
using RestSharp;


var options = new RestClientOptions("https://versuno.ai/api/public/assets/{assetId}/blocks");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "<api-key>");
request.AddJsonBody("{\n \"block\": {\n \"type\": \"paragraph\",\n \"content\": \"New block text\",\n \"meta\": {}\n }\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);
{
  "assetId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "block": {
    "id": "b_35effee2-0c97-463b-9a0a-8973eca1b4da",
    "type": "paragraph",
    "meta": {},
    "content": "This block was updated",
    "inline": [
      {}
    ],
    "children": "<array>"
  },
  "content": "<string>",
  "contentBlocks": [
    {
      "id": "b_35effee2-0c97-463b-9a0a-8973eca1b4da",
      "type": "paragraph",
      "meta": {},
      "content": "This block was updated",
      "inline": [
        {}
      ],
      "children": "<array>"
    }
  ]
}
{
"error": "Wrong data: assetType is required"
}
{
"error": "Invalid API key"
}
{
"error": "Forbidden"
}
{
"error": "Not found"
}
{
"error": "Asset is already in trash"
}
Create a new block by providing a block payload. Optionally set parentId and position.

Authorizations

Authorization
string
header
default:Bearer uk_live_your_api_key_here
required

Versuno API key. Must be prefixed with Bearer. Format: Bearer uk_live_...

Path Parameters

assetId
string<uuid>
required

Query Parameters

assetType
enum<string>

Optional type guard. If supplied, it must match the asset's actual type.

Available options:
prompt,
persona,
context,
system_prompt,
skill

Body

application/json
block
object
required
parentId
string | null

Target parent block ID. Null means root level.

position
integer

Insert position among siblings.

Required range: x >= 0

Response

Block created.

assetId
string<uuid>
block
object

A single editor block in an asset's structured content tree.

content
string
contentBlocks
object[]