import requests

url = "https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields"

payload = {
    "name": "<string>",
    "type": "<string>",
    "indexed": True,
    "stored": True,
    "multiValued": True,
    "required": True,
    "docValues": True,
    "omitNorms": True,
    "omitPositions": True,
    "omitTermFreqAndPositions": True,
    "termVectors": True,
    "termPositions": True,
    "termOffsets": True,
    "copyDests": ["<string>"],
    "copySources": ["<string>"],
    "numDocs": 123,
    "indexFields": [
        {
            "name": "<string>",
            "numDocs": 123
        }
    ],
    "default": "<string>"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

HttpResponse<String> response = Unirest.post("https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"<string>\",\n  \"type\": \"<string>\",\n  \"indexed\": true,\n  \"stored\": true,\n  \"multiValued\": true,\n  \"required\": true,\n  \"docValues\": true,\n  \"omitNorms\": true,\n  \"omitPositions\": true,\n  \"omitTermFreqAndPositions\": true,\n  \"termVectors\": true,\n  \"termPositions\": true,\n  \"termOffsets\": true,\n  \"copyDests\": [\n    \"<string>\"\n  ],\n  \"copySources\": [\n    \"<string>\"\n  ],\n  \"numDocs\": 123,\n  \"indexFields\": [\n    {\n      \"name\": \"<string>\",\n      \"numDocs\": 123\n    }\n  ],\n  \"default\": \"<string>\"\n}")
  .asString();

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: '<string>',
    type: '<string>',
    indexed: true,
    stored: true,
    multiValued: true,
    required: true,
    docValues: true,
    omitNorms: true,
    omitPositions: true,
    omitTermFreqAndPositions: true,
    termVectors: true,
    termPositions: true,
    termOffsets: true,
    copyDests: ['<string>'],
    copySources: ['<string>'],
    numDocs: 123,
    indexFields: [{name: '<string>', numDocs: 123}],
    default: '<string>'
  })
};

fetch('https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

require 'uri'
require 'net/http'

url = URI("https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"<string>\",\n  \"type\": \"<string>\",\n  \"indexed\": true,\n  \"stored\": true,\n  \"multiValued\": true,\n  \"required\": true,\n  \"docValues\": true,\n  \"omitNorms\": true,\n  \"omitPositions\": true,\n  \"omitTermFreqAndPositions\": true,\n  \"termVectors\": true,\n  \"termPositions\": true,\n  \"termOffsets\": true,\n  \"copyDests\": [\n    \"<string>\"\n  ],\n  \"copySources\": [\n    \"<string>\"\n  ],\n  \"numDocs\": 123,\n  \"indexFields\": [\n    {\n      \"name\": \"<string>\",\n      \"numDocs\": 123\n    }\n  ],\n  \"default\": \"<string>\"\n}"

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

package main

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

func main() {

	url := "https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields"

	payload := strings.NewReader("{\n  \"name\": \"<string>\",\n  \"type\": \"<string>\",\n  \"indexed\": true,\n  \"stored\": true,\n  \"multiValued\": true,\n  \"required\": true,\n  \"docValues\": true,\n  \"omitNorms\": true,\n  \"omitPositions\": true,\n  \"omitTermFreqAndPositions\": true,\n  \"termVectors\": true,\n  \"termPositions\": true,\n  \"termOffsets\": true,\n  \"copyDests\": [\n    \"<string>\"\n  ],\n  \"copySources\": [\n    \"<string>\"\n  ],\n  \"numDocs\": 123,\n  \"indexFields\": [\n    {\n      \"name\": \"<string>\",\n      \"numDocs\": 123\n    }\n  ],\n  \"default\": \"<string>\"\n}")

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

	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://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields",
  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([
    'name' => '<string>',
    'type' => '<string>',
    'indexed' => true,
    'stored' => true,
    'multiValued' => true,
    'required' => true,
    'docValues' => true,
    'omitNorms' => true,
    'omitPositions' => true,
    'omitTermFreqAndPositions' => true,
    'termVectors' => true,
    'termPositions' => true,
    'termOffsets' => true,
    'copyDests' => [
        '<string>'
    ],
    'copySources' => [
        '<string>'
    ],
    'numDocs' => 123,
    'indexFields' => [
        [
                'name' => '<string>',
                'numDocs' => 123
        ]
    ],
    'default' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

curl --request POST \
  --url https://{FUSION HOST}/api/collections/{collection}/schema/dynamicfields \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "type": "<string>",
  "indexed": true,
  "stored": true,
  "multiValued": true,
  "required": true,
  "docValues": true,
  "omitNorms": true,
  "omitPositions": true,
  "omitTermFreqAndPositions": true,
  "termVectors": true,
  "termPositions": true,
  "termOffsets": true,
  "copyDests": [
    "<string>"
  ],
  "copySources": [
    "<string>"
  ],
  "numDocs": 123,
  "indexFields": [
    {
      "name": "<string>",
      "numDocs": 123
    }
  ],
  "default": "<string>"
}
'

This response has no body data.