Restore checkpoint

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/app-checkpoints/{checkpoint_id}/load \
  --header 'api_key: <api-key>'

import requests

url = "https://app.base44.com/api/apps/{app_id}/app-checkpoints/{checkpoint_id}/load"

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}/app-checkpoints/{checkpoint_id}/load', 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}/app-checkpoints/{checkpoint_id}/load",
  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}/app-checkpoints/{checkpoint_id}/load"

	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}/app-checkpoints/{checkpoint_id}/load")

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",
  "first_prompt_model_comparison": {
    "id": "<string>",
    "client_creation_id": "<string>",
    "models": [
      "<string>"
    ],
    "status": "preparing"
  },
  "name": "My CRM",
  "slug": "my-crm-3c45a1f2",
  "user_description": "A CRM to track leads and deals",
  "created_by": "developer@example.com",
  "created_date": "2026-08-01T09:15:00",
  "updated_date": "2026-08-02T14:30:00",
  "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"
    }
  },
  "last_deployed_at": "2026-08-02T14:30:00",
  "screenshot_url": "https://storage.base44.com/screenshots/6820f3a4e7b91d003c45a1f2.png",
  "preview_screenshot_url": "https://storage.base44.com/previews/6820f3a4e7b91d003c45a1f2.png"
}

Checkpoints

Restore checkpoint

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

Returns the app to a saved checkpoint and answers with the restored app.

Restoring rolls the app’s code back to the checkpoint’s commit, redeploys its backend functions from that code, restores the entity schemas the checkpoint saved, and rewinds the app’s chat history to the point the checkpoint was taken.

A 200 does not confirm that every backend function redeployed. A function whose deployment fails is recorded and skipped rather than failing the restore, so an app that depends on its functions is worth checking afterwards.

The chat messages after the checkpoint are dropped from the conversation and do not come back. The code does come back: a restore deletes no checkpoints, so every version stays in List checkpoints and restoring a later one returns the code you rolled back from.

The work happens while you wait, and there is a lot of it: a code rollback, a redeploy per backend function, and a schema sync. Allow for that in your client’s timeout. The app’s status is processing for the duration and ready once the restore finishes, so if your request times out, poll Get app instead of sending this again.

Restoring the checkpoint the app is already on is not a no-op. There is no shortcut for that case: the rollback, the redeploy and the sync all run again.

This endpoint accepts a personal API key. Workspace API keys are not authorized for it and are rejected with a 403.

POST

api

apps

{app_id}

app-checkpoints

{checkpoint_id}

load

Restore checkpoint

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/app-checkpoints/{checkpoint_id}/load \
  --header 'api_key: <api-key>'

import requests

url = "https://app.base44.com/api/apps/{app_id}/app-checkpoints/{checkpoint_id}/load"

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}/app-checkpoints/{checkpoint_id}/load', 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}/app-checkpoints/{checkpoint_id}/load",
  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}/app-checkpoints/{checkpoint_id}/load"

	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}/app-checkpoints/{checkpoint_id}/load")

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",
  "first_prompt_model_comparison": {
    "id": "<string>",
    "client_creation_id": "<string>",
    "models": [
      "<string>"
    ],
    "status": "preparing"
  },
  "name": "My CRM",
  "slug": "my-crm-3c45a1f2",
  "user_description": "A CRM to track leads and deals",
  "created_by": "developer@example.com",
  "created_date": "2026-08-01T09:15:00",
  "updated_date": "2026-08-02T14:30:00",
  "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"
    }
  },
  "last_deployed_at": "2026-08-02T14:30:00",
  "screenshot_url": "https://storage.base44.com/screenshots/6820f3a4e7b91d003c45a1f2.png",
  "preview_screenshot_url": "https://storage.base44.com/previews/6820f3a4e7b91d003c45a1f2.png"
}

Authorizations

api_key

string

header

required

Personal API key.

Path Parameters

checkpoint_id

string

required

ID of the checkpoint, as returned in id by List checkpoints.

app_id

string

required

ID of the app.

Response

The app, as restored to the checkpoint.

An app in a workspace, limited to the properties the caller requested.

string | null

ID of the app.

Example:

"6820f3a4e7b91d003c45a1f2"

first_prompt_model_comparison

FirstPromptModelComparisonState · object | null

Accepted first-prompt model comparison, including its durable comparison ID.

Show child attributes

name

string | null

Display name of the app.

Example:

"My CRM"

slug

string | null

URL slug for the app, auto generated from the name and app ID or set to a custom value, or null if the app has no slug yet. The published URL is built from it.

Example:

"my-crm-3c45a1f2"

user_description

string | null

Description of the app, or null if none was set. On a newly created app this holds the original prompt text.

Example:

"A CRM to track leads and deals"

created_by

string | null

Email of the user who created the app.

Example:

"developer@example.com"

created_date

string<date-time> | null

Time the app was created, as a UTC timestamp in ISO 8601 format.

Example:

"2026-08-01T09:15:00"

updated_date

string<date-time> | null

Time the app document was last written, as a UTC timestamp in ISO 8601 format.

Example:

"2026-08-02T14:30:00"

status

AppStatusResponse · object | null

The app's current build status. Poll while a build is in progress to watch it finish. This tracks building, not publishing.

Show child attributes

last_deployed_at

string<date-time> | null

Time the app was last published, as a UTC timestamp in ISO 8601 format, or null if it has never been published.

Example:

"2026-08-02T14:30:00"

screenshot_url

string | null

URL of a screenshot of the published app. Captured shortly after each publish, so it can briefly lag or be null right after publishing.

Example:

"https://storage.base44.com/screenshots/6820f3a4e7b91d003c45a1f2.png"

preview_screenshot_url

string | null

URL of a preview screenshot taken before publishing, distinct from screenshot_url, or null if none has been captured.

Example:

"https://storage.base44.com/previews/6820f3a4e7b91d003c45a1f2.png"

Base44 APIs

Apps API (Beta)

Monitoring API

Audit Logs API

Restore checkpoint

Authorizations

Path Parameters

Response