Create a conversation message

curl --request POST \
  --url https://api.fluid.app/api/company/messaging/conversations/{conversation_id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user": {
    "email": "michael.scott@dundermifflin.com"
  },
  "message": {
    "body": "Reminder: the Q4 paper price list goes live Monday."
  }
}
'

import requests

url = "https://api.fluid.app/api/company/messaging/conversations/{conversation_id}/messages"

payload = {
    "user": { "email": "michael.scott@dundermifflin.com" },
    "message": { "body": "Reminder: the Q4 paper price list goes live Monday." }
}
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({
    user: {email: 'michael.scott@dundermifflin.com'},
    message: {body: JSON.stringify('Reminder: the Q4 paper price list goes live Monday.')}
  })
};

fetch('https://api.fluid.app/api/company/messaging/conversations/{conversation_id}/messages', 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.fluid.app/api/company/messaging/conversations/{conversation_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 => json_encode([
    'user' => [
        'email' => 'michael.scott@dundermifflin.com'
    ],
    'message' => [
        'body' => 'Reminder: the Q4 paper price list goes live Monday.'
    ]
  ]),
  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.fluid.app/api/company/messaging/conversations/{conversation_id}/messages"

	payload := strings.NewReader("{\n  \"user\": {\n    \"email\": \"michael.scott@dundermifflin.com\"\n  },\n  \"message\": {\n    \"body\": \"Reminder: the Q4 paper price list goes live Monday.\"\n  }\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.fluid.app/api/company/messaging/conversations/{conversation_id}/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"user\": {\n    \"email\": \"michael.scott@dundermifflin.com\"\n  },\n  \"message\": {\n    \"body\": \"Reminder: the Q4 paper price list goes live Monday.\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fluid.app/api/company/messaging/conversations/{conversation_id}/messages")

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  \"user\": {\n    \"email\": \"michael.scott@dundermifflin.com\"\n  },\n  \"message\": {\n    \"body\": \"Reminder: the Q4 paper price list goes live Monday.\"\n  }\n}"

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

{
  "id": 884213,
  "conversation_id": 23018,
  "type": "DirectMessage",
  "status": "sent",
  "body": "Reminder: the Q4 paper price list goes live Monday.",
  "metadata": null,
  "attachments": [],
  "sender_recipient": {
    "id": 61190,
    "first_name": "Michael",
    "last_name": "Scott",
    "discarded_at": null,
    "avatar_background": "#F5A623",
    "image_url": "https://cdn.fluid.app/dunder-mifflin/avatars/michael-scott.jpg",
    "pro_user": false,
    "blocked": false,
    "blocker": false
  },
  "replied_to_message": null,
  "mentioned_recipients": [],
  "seen_by": [],
  "seen_by_count": 0,
  "reaction": null,
  "reaction_stats": {},
  "emoji_only_count": 0,
  "pinned": false,
  "sent_at": "2026-09-14T16:02:31Z",
  "edited_at": null,
  "deleted_at": null,
  "created_at": "2026-09-14T16:02:31Z",
  "updated_at": "2026-09-14T16:02:31Z"
}

{
  "message": "<string>"
}