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POST
/
api
/
v1
/
generate
/
sign
Mint signed image URLs
curl --request POST \
  --url https://api.kynva.ai/api/v1/generate/sign \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "template": "<string>",
  "params": [
    {}
  ],
  "profile_id": "<string>",
  "expires_in": 61
}
'
import requests

url = "https://api.kynva.ai/api/v1/generate/sign"

payload = {
    "template": "<string>",
    "params": [{}],
    "profile_id": "<string>",
    "expires_in": 61
}
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({template: '<string>', params: [{}], profile_id: '<string>', expires_in: 61})
};

fetch('https://api.kynva.ai/api/v1/generate/sign', 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.kynva.ai/api/v1/generate/sign",
  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([
    'template' => '<string>',
    'params' => [
        [
                
        ]
    ],
    'profile_id' => '<string>',
    'expires_in' => 61
  ]),
  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.kynva.ai/api/v1/generate/sign"

	payload := strings.NewReader("{\n  \"template\": \"<string>\",\n  \"params\": [\n    {}\n  ],\n  \"profile_id\": \"<string>\",\n  \"expires_in\": 61\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.kynva.ai/api/v1/generate/sign")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"template\": \"<string>\",\n  \"params\": [\n    {}\n  ],\n  \"profile_id\": \"<string>\",\n  \"expires_in\": 61\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.kynva.ai/api/v1/generate/sign")

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  \"template\": \"<string>\",\n  \"params\": [\n    {}\n  ],\n  \"profile_id\": \"<string>\",\n  \"expires_in\": 61\n}"

response = http.request(request)
puts response.read_body
{
  "data": {
    "urls": [
      "<string>"
    ]
  }
}

Authorizations

Authorization
string
header
required

Your Kynva API key (kyn_live_xxx or kyn_test_xxx; legacy rf_ keys remain valid)

Body

application/json
template
string
required

Design preset slug, optionally version-pinned ("promo-bold@3")

params
object[]
required

One entry per URL to mint

Required array length: 1 - 100 elements
profile_id
string

Applied to every URL (default facebook_16x9)

format
enum<string>
Available options:
png,
jpg
expires_in
number | null

Seconds until expiry. Omit for non-expiring URLs (recommended for OG tags).

Required range: x >= 60

Response

200 - application/json

Signed URLs minted

data
object