Undo message

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo \
  --header 'api_key: <api-key>'

import requests

url = "https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo"

headers = {"api_key": "<api-key>"}

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

print(response.text)

const options = {method: 'POST', headers: {api_key: '<api-key>'}};

fetch('https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo', 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://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "api_key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo"

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

	req.Header.Add("api_key", "<api-key>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["api_key"] = '<api-key>'

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

{
  "id": "6820f3a4e7b91d003c45a1f2",
  "name": "My CRM",
  "status": {
    "state": "ready",
    "details": "Publishing app",
    "request_id": "a1b2c3d4e5f67890abcdef12",
    "last_updated_date": "2026-08-02T14:30:00Z",
    "error_source": "build",
    "paywall_context": {
      "billing_organization_id": "67e0b12c4d8a3f005b21c9e4",
      "user_id": "6706af53b9c1e2004a37d85f",
      "evaluated_at": "2026-08-02T14:30:00Z"
    }
  },
  "conversation": {
    "id": "1f0c2b7a-9d51-4c3e-8a62-7b4d5e6f8a90",
    "messages": [
      {
        "id": "7f3a1c88-52d4-4a0e-9b31-2c6f0d8e4a19",
        "role": "assistant",
        "content": "I added a contact form to the home page.",
        "file_urls": [
          "https://example.com/mockup.png"
        ],
        "hidden": false,
        "checkpoint_id": "6886b8d390dc7e2f4a2c91b3",
        "tool_calls": [
          {
            "id": "toolu_01A9FJd3kP2mNqRs7VwXyZ4b",
            "name": "create_file",
            "status": "waiting_for_user_input",
            "requires_user_input": true,
            "arguments_string": "{\"file_path\": \"src/pages/Home.jsx\", \"content\": \"export default function Home() {}\"}"
          }
        ],
        "usage": {
          "prompt_tokens": 18432,
          "completion_tokens": 742,
          "credits_charged": 1.5
        },
        "metadata": {
          "created_date": "2026-08-02T14:30:00",
          "created_by_email": "developer@example.com"
        }
      }
    ]
  }
}

Chat

Undo message

This API is in beta. Endpoints, fields, and behavior may still change, so avoid depending on it in production.

Rolls the app back to the checkpoint a message produced, undoing everything the AI did after it.

Pass the ID of the message you want to roll back to. Find it with Read conversation messages. Only a message that carries a checkpoint_id can be undone. The app’s code goes back to that saved version.

This changes the app you are building, not the app your users see. Publish with Deploy an app to make the rollback live.

When branch_id is supplied, the message and checkpoint must belong to that active branch. The rollback changes only that branch and creates a new commit on its Git ref; Main and other branches are unchanged.

The response includes fields beyond the ones documented here. Don’t rely on undocumented response fields, as they can change at any time.

POST

api

apps

{app_id}

chat

message

{message_id}

undo

Undo message

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo \
  --header 'api_key: <api-key>'

import requests

url = "https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo"

headers = {"api_key": "<api-key>"}

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

print(response.text)

const options = {method: 'POST', headers: {api_key: '<api-key>'}};

fetch('https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo', 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://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "api_key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo"

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

	req.Header.Add("api_key", "<api-key>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://app.base44.com/api/apps/{app_id}/chat/message/{message_id}/undo")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["api_key"] = '<api-key>'

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

{
  "id": "6820f3a4e7b91d003c45a1f2",
  "name": "My CRM",
  "status": {
    "state": "ready",
    "details": "Publishing app",
    "request_id": "a1b2c3d4e5f67890abcdef12",
    "last_updated_date": "2026-08-02T14:30:00Z",
    "error_source": "build",
    "paywall_context": {
      "billing_organization_id": "67e0b12c4d8a3f005b21c9e4",
      "user_id": "6706af53b9c1e2004a37d85f",
      "evaluated_at": "2026-08-02T14:30:00Z"
    }
  },
  "conversation": {
    "id": "1f0c2b7a-9d51-4c3e-8a62-7b4d5e6f8a90",
    "messages": [
      {
        "id": "7f3a1c88-52d4-4a0e-9b31-2c6f0d8e4a19",
        "role": "assistant",
        "content": "I added a contact form to the home page.",
        "file_urls": [
          "https://example.com/mockup.png"
        ],
        "hidden": false,
        "checkpoint_id": "6886b8d390dc7e2f4a2c91b3",
        "tool_calls": [
          {
            "id": "toolu_01A9FJd3kP2mNqRs7VwXyZ4b",
            "name": "create_file",
            "status": "waiting_for_user_input",
            "requires_user_input": true,
            "arguments_string": "{\"file_path\": \"src/pages/Home.jsx\", \"content\": \"export default function Home() {}\"}"
          }
        ],
        "usage": {
          "prompt_tokens": 18432,
          "completion_tokens": 742,
          "credits_charged": 1.5
        },
        "metadata": {
          "created_date": "2026-08-02T14:30:00",
          "created_by_email": "developer@example.com"
        }
      }
    ]
  }
}

Authorizations

api_key

string

header

required

Personal API key.

Path Parameters

message_id

string

required

ID of the message to roll back to. Take it from Read conversation messages.

app_id

string

required

ID of the app whose AI chat this request acts on.

Response

Successful Response

An app, with its conversation and build status.

string | null

ID of the app.

Example:

"6820f3a4e7b91d003c45a1f2"

name

string | null

Display name of the app.

Example:

"My CRM"

status

AppStatusResponse · object | null

The app's build status once the request returned. Read state to tell a finished turn from one that is still processing or that failed.

Show child attributes

conversation

ChatTurnConversation · object | null

The app's conversation, including the messages this request produced.

Show child attributes

Base44 APIs

Apps API (Beta)

Monitoring API

Audit Logs API

Undo message

Authorizations

Path Parameters

Response