curl --request POST \
  --url https://api.projectcor.com/v1/projects/{id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data 'message=<string>' \
  --data 'attachments={
  "id": 123,
  "name": "<string>",
  "url": "<string>",
  "type": "<string>",
  "source": "<string>"
}'

import requests

url = "https://api.projectcor.com/v1/projects/{id}/messages"

payload = {
    "message": "<string>",
    "attachments": "{
  \"id\": 123,
  \"name\": \"<string>\",
  \"url\": \"<string>\",
  \"type\": \"<string>\",
  \"source\": \"<string>\"
}"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/x-www-form-urlencoded"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({
    message: '<string>',
    attachments: '{\n  "id": 123,\n  "name": "<string>",\n  "url": "<string>",\n  "type": "<string>",\n  "source": "<string>"\n}'
  })
};

fetch('https://api.projectcor.com/v1/projects/{id}/messages', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const encodedParams = new URLSearchParams();
encodedParams.set('message', '<string>');
encodedParams.set('attachments', '{
  "id": 123,
  "name": "<string>",
  "url": "<string>",
  "type": "<string>",
  "source": "<string>"
}');

const url = 'https://api.projectcor.com/v1/projects/{id}/messages';
const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: encodedParams
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.projectcor.com/v1/projects/{id}/messages",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "message=%3Cstring%3E&attachments=%7B%0A%20%20%22id%22%3A%20123%2C%0A%20%20%22name%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22url%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22type%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22source%22%3A%20%22%3Cstring%3E%22%0A%7D",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/x-www-form-urlencoded"
  ],
]);

$response = curl_exec($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.projectcor.com/v1/projects/{id}/messages"

	payload := strings.NewReader("message=%3Cstring%3E&attachments=%7B%0A%20%20%22id%22%3A%20123%2C%0A%20%20%22name%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22url%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22type%22%3A%20%22%3Cstring%3E%22%2C%0A%20%20%22source%22%3A%20%22%3Cstring%3E%22%0A%7D")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}