curl -X POST 'https://api.gumloop.com/api/v1/sessions/sess_xYz789AbCd/messages' \
  -H 'Authorization: Bearer YOUR_ACCESS_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"input": "Now write a follow-up email."}'

from gumloop import Gumloop

client = Gumloop(access_token="YOUR_ACCESS_TOKEN")

response = client.sessions.send(
    "sess_xYz789AbCd",
    input="Now write a follow-up email.",
)
print(response.session.state)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    input: 'Now write a follow-up email.',
    stream: false,
    attachments: [
      {
        file_name: 'custom_agent_interactions/sess_xYz789AbCd/input/report.pdf',
        media_type: 'application/pdf'
      }
    ]
  })
};

fetch('https://api.gumloop.com/api/v1/sessions/{session_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.gumloop.com/api/v1/sessions/{session_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([
    'input' => 'Now write a follow-up email.',
    'stream' => false,
    'attachments' => [
        [
                'file_name' => 'custom_agent_interactions/sess_xYz789AbCd/input/report.pdf',
                'media_type' => 'application/pdf'
        ]
    ]
  ]),
  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.gumloop.com/api/v1/sessions/{session_id}/messages"

	payload := strings.NewReader("{\n  \"input\": \"Now write a follow-up email.\",\n  \"stream\": false,\n  \"attachments\": [\n    {\n      \"file_name\": \"custom_agent_interactions/sess_xYz789AbCd/input/report.pdf\",\n      \"media_type\": \"application/pdf\"\n    }\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.gumloop.com/api/v1/sessions/{session_id}/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"input\": \"Now write a follow-up email.\",\n  \"stream\": false,\n  \"attachments\": [\n    {\n      \"file_name\": \"custom_agent_interactions/sess_xYz789AbCd/input/report.pdf\",\n      \"media_type\": \"application/pdf\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gumloop.com/api/v1/sessions/{session_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  \"input\": \"Now write a follow-up email.\",\n  \"stream\": false,\n  \"attachments\": [\n    {\n      \"file_name\": \"custom_agent_interactions/sess_xYz789AbCd/input/report.pdf\",\n      \"media_type\": \"application/pdf\"\n    }\n  ]\n}"

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

{
  "session": {
    "id": "sess_xYz789AbCd",
    "agent_id": "abc123DEFghiJKL",
    "messages": [
      {
        "id": "msg_a1b2c3",
        "role": "user",
        "content": "Research Acme Corp and draft a brief.",
        "created_at": "2026-05-15T14:32:00Z",
        "creator_id": "user_2b9d71f0",
        "parts": null
      },
      {
        "id": "msg_d4e5f6",
        "role": "assistant",
        "content": "Here is what I found about Acme Corp...",
        "created_at": "2026-05-15T14:32:09Z",
        "creator_id": null,
        "parts": null
      },
      {
        "id": "msg_g7h8i9",
        "role": "user",
        "content": "Now write a follow-up email.",
        "created_at": "2026-05-15T14:35:00Z",
        "creator_id": "user_2b9d71f0",
        "parts": null
      }
    ],
    "created_at": "2026-05-15T14:32:00Z",
    "state": "processing",
    "agent_name": "Sales research agent",
    "agent_team_id": "team_4f8c92ab",
    "agent_creator_user_id": "user_2b9d71f0",
    "agent_icon_url": null,
    "agent_tools": [],
    "participants": {
      "user_2b9d71f0": {
        "first_name": "Ada",
        "last_name": "Lovelace"
      }
    },
    "creator": {
      "id": "user_2b9d71f0",
      "first_name": "Ada",
      "last_name": "Lovelace",
      "email": "ada@example.com",
      "profile_picture": null
    }
  },
  "queue_position": null
}