curl "https://api.phrase.com/v2/projects/:project_id/keys" \
  -u USERNAME_OR_ACCESS_TOKEN \
  -X POST \
  -F branch=my-feature-branch \
  -F name=home.index.headline \
  -F description=Some%20description%20worth%20knowing... \
  -F name_plural=home.index.headlines \
  -F data_type=number \
  -F tags=awesome-feature,needs-proofreading \
  -F max_characters_allowed=140 \
  -F screenshot=@/path/to/my/screenshot.png \
  -F custom_metadata[property]=value

phrase keys create \
--project_id <project_id> \
--data '{"branch":"my-feature-branch", "name":"home.index.headline", "description": "Some description worth knowing...", "name_plural":"home.index.headlines", "data_type":"number", "tags":"awesome-feature,needs-proofreading", "max_characters_allowed":"140", "screenshot":"/path/to/my/screenshot.png", "custom_metadata": {"property" => "value"}}' \
--access_token <token>

import requests

url = "https://api.phrase.com/v2/projects/{project_id}/keys"

payload = {
    "name": "home.index.headline",
    "branch": "my-feature-branch",
    "description": "Some description worth knowing...",
    "plural": None,
    "use_ordinal_rules": None,
    "name_plural": "home.index.headlines",
    "data_type": "number",
    "tags": "awesome-feature,needs-proofreading",
    "max_characters_allowed": 140,
    "screenshot": "/path/to/my/screenshot.png",
    "remove_screenshot": None,
    "unformatted": None,
    "default_translation_content": "Default translation content",
    "autotranslate": None,
    "xml_space_preserve": None,
    "original_file": None,
    "localized_format_string": None,
    "localized_format_key": None,
    "custom_metadata": {
        "fruit": "Apple",
        "vegetable": "Tomato"
    },
    "excluded_in_locales": ["de", "fr"],
    "format_value_type": "string"
}
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({
    name: 'home.index.headline',
    branch: 'my-feature-branch',
    description: 'Some description worth knowing...',
    plural: null,
    use_ordinal_rules: null,
    name_plural: 'home.index.headlines',
    data_type: 'number',
    tags: 'awesome-feature,needs-proofreading',
    max_characters_allowed: 140,
    screenshot: '/path/to/my/screenshot.png',
    remove_screenshot: null,
    unformatted: null,
    default_translation_content: 'Default translation content',
    autotranslate: null,
    xml_space_preserve: null,
    original_file: null,
    localized_format_string: null,
    localized_format_key: null,
    custom_metadata: {fruit: 'Apple', vegetable: 'Tomato'},
    excluded_in_locales: ['de', 'fr'],
    format_value_type: 'string'
  })
};

fetch('https://api.phrase.com/v2/projects/{project_id}/keys', 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.phrase.com/v2/projects/{project_id}/keys",
  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' => 'home.index.headline',
    'branch' => 'my-feature-branch',
    'description' => 'Some description worth knowing...',
    'plural' => null,
    'use_ordinal_rules' => null,
    'name_plural' => 'home.index.headlines',
    'data_type' => 'number',
    'tags' => 'awesome-feature,needs-proofreading',
    'max_characters_allowed' => 140,
    'screenshot' => '/path/to/my/screenshot.png',
    'remove_screenshot' => null,
    'unformatted' => null,
    'default_translation_content' => 'Default translation content',
    'autotranslate' => null,
    'xml_space_preserve' => null,
    'original_file' => null,
    'localized_format_string' => null,
    'localized_format_key' => null,
    'custom_metadata' => [
        'fruit' => 'Apple',
        'vegetable' => 'Tomato'
    ],
    'excluded_in_locales' => [
        'de',
        'fr'
    ],
    'format_value_type' => 'string'
  ]),
  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;
}

package main

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

func main() {

	url := "https://api.phrase.com/v2/projects/{project_id}/keys"

	payload := strings.NewReader("{\n  \"name\": \"home.index.headline\",\n  \"branch\": \"my-feature-branch\",\n  \"description\": \"Some description worth knowing...\",\n  \"plural\": null,\n  \"use_ordinal_rules\": null,\n  \"name_plural\": \"home.index.headlines\",\n  \"data_type\": \"number\",\n  \"tags\": \"awesome-feature,needs-proofreading\",\n  \"max_characters_allowed\": 140,\n  \"screenshot\": \"/path/to/my/screenshot.png\",\n  \"remove_screenshot\": null,\n  \"unformatted\": null,\n  \"default_translation_content\": \"Default translation content\",\n  \"autotranslate\": null,\n  \"xml_space_preserve\": null,\n  \"original_file\": null,\n  \"localized_format_string\": null,\n  \"localized_format_key\": null,\n  \"custom_metadata\": {\n    \"fruit\": \"Apple\",\n    \"vegetable\": \"Tomato\"\n  },\n  \"excluded_in_locales\": [\n    \"de\",\n    \"fr\"\n  ],\n  \"format_value_type\": \"string\"\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))

}

HttpResponse<String> response = Unirest.post("https://api.phrase.com/v2/projects/{project_id}/keys")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"home.index.headline\",\n  \"branch\": \"my-feature-branch\",\n  \"description\": \"Some description worth knowing...\",\n  \"plural\": null,\n  \"use_ordinal_rules\": null,\n  \"name_plural\": \"home.index.headlines\",\n  \"data_type\": \"number\",\n  \"tags\": \"awesome-feature,needs-proofreading\",\n  \"max_characters_allowed\": 140,\n  \"screenshot\": \"/path/to/my/screenshot.png\",\n  \"remove_screenshot\": null,\n  \"unformatted\": null,\n  \"default_translation_content\": \"Default translation content\",\n  \"autotranslate\": null,\n  \"xml_space_preserve\": null,\n  \"original_file\": null,\n  \"localized_format_string\": null,\n  \"localized_format_key\": null,\n  \"custom_metadata\": {\n    \"fruit\": \"Apple\",\n    \"vegetable\": \"Tomato\"\n  },\n  \"excluded_in_locales\": [\n    \"de\",\n    \"fr\"\n  ],\n  \"format_value_type\": \"string\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.phrase.com/v2/projects/{project_id}/keys")

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  \"name\": \"home.index.headline\",\n  \"branch\": \"my-feature-branch\",\n  \"description\": \"Some description worth knowing...\",\n  \"plural\": null,\n  \"use_ordinal_rules\": null,\n  \"name_plural\": \"home.index.headlines\",\n  \"data_type\": \"number\",\n  \"tags\": \"awesome-feature,needs-proofreading\",\n  \"max_characters_allowed\": 140,\n  \"screenshot\": \"/path/to/my/screenshot.png\",\n  \"remove_screenshot\": null,\n  \"unformatted\": null,\n  \"default_translation_content\": \"Default translation content\",\n  \"autotranslate\": null,\n  \"xml_space_preserve\": null,\n  \"original_file\": null,\n  \"localized_format_string\": null,\n  \"localized_format_key\": null,\n  \"custom_metadata\": {\n    \"fruit\": \"Apple\",\n    \"vegetable\": \"Tomato\"\n  },\n  \"excluded_in_locales\": [\n    \"de\",\n    \"fr\"\n  ],\n  \"format_value_type\": \"string\"\n}"

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

{
  "id": "abcd1234cdef1234abcd1234cdef1234",
  "name": "home.index.headline",
  "description": "My description for this key...",
  "name_hash": "1b31d2580ce324f246f66b3be00ed399",
  "plural": false,
  "use_ordinal_rules": false,
  "tags": [
    "awesome-feature",
    "needs-proofreading"
  ],
  "data_type": "string",
  "created_at": "2015-01-28T09:52:53Z",
  "updated_at": "2015-01-28T09:52:53Z",
  "name_plural": "home.index.headlines",
  "comments_count": 2,
  "max_characters_allowed": 140,
  "screenshot_url": "http://assets.example.com/screenshot.png",
  "unformatted": false,
  "xml_space_preserve": false,
  "original_file": "",
  "format_value_type": "",
  "creator": {
    "id": "abcd1234cdef1234abcd1234cdef1234",
    "username": "joe.doe",
    "name": "Joe Doe"
  },
  "custom_metadata": {
    "fruit": "Apple",
    "vegetable": "Tomato"
  }
}

{
  "message": "Validation Failed",
  "errors": [
    {
      "resource": "Resource",
      "field": "name",
      "message": "can't be blank"
    }
  ]
}