IDidealspot

Save several app files

Changed on

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

Saves several files into the app in one call, the way the app editor does.

Send up to 50 files. Every path is validated before anything is written, so one bad path fails the whole batch with a 400 and leaves the app untouched. An empty files list is a 400 rather than a no-op.

This route never deploys, so it refuses backend code: a path under functions/ answers 422 rather than writing source that the live function wouldn't match. Use Save an app file for those, one at a time, and this one for the frontend files a visual edit touches.

Set branch_id to save the files on a branch instead of main. The changes go to the branch's own code. On a branch, files that define the app's resources, such as entity and agent schemas, are refused with a 409, except on an app imported from GitHub. To add entities or fields on the branch, use Send chat message with the same branch_id.

The response is the app document as it stands after the change, the same shape Get app returns. On a branch, it's main's app document, so it doesn't show the change.

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

<Warning>The response includes fields beyond the ones documented here. Don't rely on undocumented response fields, as they can change at any time. Send only the fields documented here. Other request fields are not supported and their behavior can change.</Warning>

post/api/apps/{app_id}/coding/write-batch

Request

  • Base URL
    https://app.base44.com
  • URL
    https://app.base44.com/api/apps/{app_id}/coding/write-batch
  • Auth
    HTTP bearer

Path parameters

app_idstring required

ID of the app whose code to change.

Query parameters

branch_idstring

ID of the branch to work on, as returned by List branches. Omit it to work on the app's main branch.

Request body

Example request

{
  "files": [
    {
      "content": "export default function About() {\n  return <h1>About</h1>;\n}\n",
      "file_path": "src/pages/About.jsx"
    },
    {
      "content": "export default function Home() {\n  return <h1>Home</h1>;\n}\n",
      "file_path": "src/pages/Home.jsx"
    }
  ]
}

Response

The app after the writes.

idstring

ID of the app.

created_datestring date-time

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

updated_datestring date-time

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

created_bystring nullable

Email of the user who created the app.

organization_idstring nullable

ID of the workspace the app belongs to.

app_typestring

Kind of app, set when it's created. One of user_app (a web app), user_agent (an AI agent), mobile_app (a native mobile app), user_game (a game), slide (a presentation), or imported_app (an app imported from an existing code repository). List apps returns it as stored, so an older agent app can report agent instead of user_agent, and some older apps don't include it. Get app always returns one of the values above.

namestring

Display name of the app.

user_descriptionstring nullable

Description of the app, or null if none was set. An app created without a name gets a generated description once a build turn changes it.

logo_urlstring nullable

URL of the app's logo, or null if it has none. Set it with Set app logo or Generate app logo.

social_image_urlstring nullable

URL of the image shown when the app is shared on social platforms, or null if none was set, in which case the logo is shown instead. Set it with Set social image.

public_settings'private_with_login' | 'public_with_login' | 'public_without_login' | 'workspace_with_login'

Who can open the published app. Each value is described under Update app, which also changes it.

hide_entity_created_byboolean

Whether the app's entity records leave out the email of the user who created each one (created_by). Newer apps always leave the email out, whatever this is set to.

is_remixableboolean

Whether others can remix the app. While it's true, the published app also shows the Base44 badge if public_settings is public_with_login or public_without_login.

main_branch_protectedboolean

Whether the app's main branch is protected, so changes to main must go through a branch that's merged back. Always true for imported apps. Change it with Set main branch protection.

slugstring nullable

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.

is_unpublishedboolean

Whether the app was taken offline with Unpublish app and hasn't been published again since. While it's true, the published URL is offline and last_deployed_at still shows the last publish.

last_deployed_atstring date-time nullable

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

screenshot_urlstring nullable

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

preview_screenshot_urlstring nullable

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

owner_idstring nullable

ID of the user who owns the app. It starts as the creator and changes when ownership is transferred.

dev_environment_enabledboolean

Whether test data is on, which gives the app a test database next to its live one.

Example response

{
  "id": "6820f3a4e7b91d003c45a1f2",
  "created_date": "2026-08-01T09:15:00",
  "updated_date": "2026-08-02T14:30:00",
  "created_by": "developer@example.com",
  "organization_id": "67e0b12c4d8a3f005b21c9e4",
  "app_type": "user_app",
  "name": "My CRM",
  "user_description": "A CRM to track leads and deals",
  "logo_url": "https://storage.base44.com/6820f3a4e7b91d003c45a1f2/3f2504e0_logo.png",
  "social_image_url": "https://storage.base44.com/6820f3a4e7b91d003c45a1f2/7c9e6679_social.png",
  "public_settings": "public_with_login",
  "auth_config": {
    "enable_username_password": true,
    "enable_google_login": true
  },
  "hide_entity_created_by": true,
  "slug": "my-crm-3c45a1f2",
  "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",
  "owner_id": "6706af53b9c1e2004a37d85f",
  "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"
    }
  }
}

Changes