curl --request POST \
  --url https://api.joinsayless.com/api/v1/messages/send_message \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "workspaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "conversationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "senderId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "statusId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "privateNote": true,
  "content": "<string>",
  "subject": "<string>",
  "preview": "<string>",
  "channel": {},
  "contentAttributes": {},
  "previousMessageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "attachments": [
    "<unknown>"
  ],
  "mutationId": "<string>"
}
'

import requests

url = "https://api.joinsayless.com/api/v1/messages/send_message"

payload = {
    "workspaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "conversationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "messageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "senderId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "statusId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "privateNote": True,
    "content": "<string>",
    "subject": "<string>",
    "preview": "<string>",
    "channel": {},
    "contentAttributes": {},
    "previousMessageId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "attachments": ["<unknown>"],
    "mutationId": "<string>"
}
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({
    workspaceId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    conversationId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    messageId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    senderId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    statusId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    privateNote: true,
    content: '<string>',
    subject: '<string>',
    preview: '<string>',
    channel: {},
    contentAttributes: {},
    previousMessageId: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    attachments: ['<unknown>'],
    mutationId: '<string>'
  })
};

fetch('https://api.joinsayless.com/api/v1/messages/send_message', 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.joinsayless.com/api/v1/messages/send_message",
  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([
    'workspaceId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'conversationId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'messageId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'senderId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'statusId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'privateNote' => true,
    'content' => '<string>',
    'subject' => '<string>',
    'preview' => '<string>',
    'channel' => [
        
    ],
    'contentAttributes' => [
        
    ],
    'previousMessageId' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'attachments' => [
        '<unknown>'
    ],
    'mutationId' => '<string>'
  ]),
  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.joinsayless.com/api/v1/messages/send_message"

	payload := strings.NewReader("{\n  \"workspaceId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"conversationId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"messageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"senderId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"statusId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"privateNote\": true,\n  \"content\": \"<string>\",\n  \"subject\": \"<string>\",\n  \"preview\": \"<string>\",\n  \"channel\": {},\n  \"contentAttributes\": {},\n  \"previousMessageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"attachments\": [\n    \"<unknown>\"\n  ],\n  \"mutationId\": \"<string>\"\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.joinsayless.com/api/v1/messages/send_message")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"workspaceId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"conversationId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"messageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"senderId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"statusId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"privateNote\": true,\n  \"content\": \"<string>\",\n  \"subject\": \"<string>\",\n  \"preview\": \"<string>\",\n  \"channel\": {},\n  \"contentAttributes\": {},\n  \"previousMessageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"attachments\": [\n    \"<unknown>\"\n  ],\n  \"mutationId\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.joinsayless.com/api/v1/messages/send_message")

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  \"workspaceId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"conversationId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"messageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"senderId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"statusId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"privateNote\": true,\n  \"content\": \"<string>\",\n  \"subject\": \"<string>\",\n  \"preview\": \"<string>\",\n  \"channel\": {},\n  \"contentAttributes\": {},\n  \"previousMessageId\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"attachments\": [\n    \"<unknown>\"\n  ],\n  \"mutationId\": \"<string>\"\n}"

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

{
  "success": true,
  "data": "<unknown>",
  "mutationId": "<string>",
  "lastSyncId": 123,
  "contentLastSyncId": 123,
  "syncAckSource": "commit"
}

{
  "error": {
    "type": "<string>",
    "message": "<string>",
    "userMessage": "<string>",
    "fields": {}
  },
  "statusCode": 123,
  "timestamp": "<string>",
  "path": "<string>"
}