curl --request POST \
  --url https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests \
  --header 'Content-Type: application/json' \
  --header 'x-immutable-api-key: <api-key>' \
  --data '
{
  "assets": [
    {
      "reference_id": "67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0",
      "owner_address": "0xc344c05eef8876e517072f879dae8905aa2b956b",
      "token_id": "1",
      "amount": "1",
      "metadata": {
        "name": "Sword",
        "description": "2022-08-16T17:43:26.991388Z",
        "image": "https://some-url",
        "external_url": "https://some-url",
        "animation_url": "https://some-url",
        "youtube_url": "https://some-url",
        "attributes": [
          {
            "trait_type": "Aqua Power",
            "value": "Happy",
            "display_type": "number"
          }
        ]
      }
    }
  ]
}
'

import requests

url = "https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests"

payload = { "assets": [
        {
            "reference_id": "67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0",
            "owner_address": "0xc344c05eef8876e517072f879dae8905aa2b956b",
            "token_id": "1",
            "amount": "1",
            "metadata": {
                "name": "Sword",
                "description": "2022-08-16T17:43:26.991388Z",
                "image": "https://some-url",
                "external_url": "https://some-url",
                "animation_url": "https://some-url",
                "youtube_url": "https://some-url",
                "attributes": [
                    {
                        "trait_type": "Aqua Power",
                        "value": "Happy",
                        "display_type": "number"
                    }
                ]
            }
        }
    ] }
headers = {
    "x-immutable-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-immutable-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    assets: [
      {
        reference_id: '67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0',
        owner_address: '0xc344c05eef8876e517072f879dae8905aa2b956b',
        token_id: '1',
        amount: '1',
        metadata: {
          name: 'Sword',
          description: '2022-08-16T17:43:26.991388Z',
          image: 'https://some-url',
          external_url: 'https://some-url',
          animation_url: 'https://some-url',
          youtube_url: 'https://some-url',
          attributes: [{trait_type: 'Aqua Power', value: 'Happy', display_type: 'number'}]
        }
      }
    ]
  })
};

fetch('https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests', 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.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests",
  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([
    'assets' => [
        [
                'reference_id' => '67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0',
                'owner_address' => '0xc344c05eef8876e517072f879dae8905aa2b956b',
                'token_id' => '1',
                'amount' => '1',
                'metadata' => [
                                'name' => 'Sword',
                                'description' => '2022-08-16T17:43:26.991388Z',
                                'image' => 'https://some-url',
                                'external_url' => 'https://some-url',
                                'animation_url' => 'https://some-url',
                                'youtube_url' => 'https://some-url',
                                'attributes' => [
                                                                [
                                                                                                                                'trait_type' => 'Aqua Power',
                                                                                                                                'value' => 'Happy',
                                                                                                                                'display_type' => 'number'
                                                                ]
                                ]
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-immutable-api-key: <api-key>"
  ],
]);

$response = curl_exec($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.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests"

	payload := strings.NewReader("{\n  \"assets\": [\n    {\n      \"reference_id\": \"67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0\",\n      \"owner_address\": \"0xc344c05eef8876e517072f879dae8905aa2b956b\",\n      \"token_id\": \"1\",\n      \"amount\": \"1\",\n      \"metadata\": {\n        \"name\": \"Sword\",\n        \"description\": \"2022-08-16T17:43:26.991388Z\",\n        \"image\": \"https://some-url\",\n        \"external_url\": \"https://some-url\",\n        \"animation_url\": \"https://some-url\",\n        \"youtube_url\": \"https://some-url\",\n        \"attributes\": [\n          {\n            \"trait_type\": \"Aqua Power\",\n            \"value\": \"Happy\",\n            \"display_type\": \"number\"\n          }\n        ]\n      }\n    }\n  ]\n}")

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

	req.Header.Add("x-immutable-api-key", "<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))

}

HttpResponse<String> response = Unirest.post("https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests")
  .header("x-immutable-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"assets\": [\n    {\n      \"reference_id\": \"67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0\",\n      \"owner_address\": \"0xc344c05eef8876e517072f879dae8905aa2b956b\",\n      \"token_id\": \"1\",\n      \"amount\": \"1\",\n      \"metadata\": {\n        \"name\": \"Sword\",\n        \"description\": \"2022-08-16T17:43:26.991388Z\",\n        \"image\": \"https://some-url\",\n        \"external_url\": \"https://some-url\",\n        \"animation_url\": \"https://some-url\",\n        \"youtube_url\": \"https://some-url\",\n        \"attributes\": [\n          {\n            \"trait_type\": \"Aqua Power\",\n            \"value\": \"Happy\",\n            \"display_type\": \"number\"\n          }\n        ]\n      }\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.immutable.com/v1/chains/{chain_name}/collections/{contract_address}/nfts/mint-requests")

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

request = Net::HTTP::Post.new(url)
request["x-immutable-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"assets\": [\n    {\n      \"reference_id\": \"67f7d464-b8f0-4f6a-9a3b-8d3cb4a21af0\",\n      \"owner_address\": \"0xc344c05eef8876e517072f879dae8905aa2b956b\",\n      \"token_id\": \"1\",\n      \"amount\": \"1\",\n      \"metadata\": {\n        \"name\": \"Sword\",\n        \"description\": \"2022-08-16T17:43:26.991388Z\",\n        \"image\": \"https://some-url\",\n        \"external_url\": \"https://some-url\",\n        \"animation_url\": \"https://some-url\",\n        \"youtube_url\": \"https://some-url\",\n        \"attributes\": [\n          {\n            \"trait_type\": \"Aqua Power\",\n            \"value\": \"Happy\",\n            \"display_type\": \"number\"\n          }\n        ]\n      }\n    }\n  ]\n}"

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

{
  "imx_mint_requests_limit": "<string>",
  "imx_mint_requests_limit_reset": "<string>",
  "imx_remaining_mint_requests": "<string>",
  "imx_mint_requests_retry_after": "<string>"
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "VALIDATION_ERROR",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "UNAUTHORISED_REQUEST",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "AUTHENTICATION_ERROR",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "RESOURCE_NOT_FOUND",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "CONFLICT_ERROR",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "TOO_MANY_REQUESTS_ERROR",
  "details": {}
}

{
  "message": "all fields must be provided",
  "link": "https://docs.x.immutable.com/reference/#/",
  "trace_id": "e47634b79a5cd6894ddc9639ec4aad26",
  "code": "INTERNAL_SERVER_ERROR",
  "details": {}
}