> ## Documentation Index > Fetch the complete documentation index at: https://docs.base44.com/llms.txt > Use this file to discover all available pages before exploring further. # Check for main sandbox updates > This API is in beta. Endpoints, fields, and behavior may still change, so avoid depending on it in production. Asks Base44 to check the branch the app was imported from and update the main sandbox if it moved. The request returns before the update runs, so poll [Get main sandbox update status](/api-reference/get-main-sandbox-update-status) to follow it. Base44 reads the branch at most once a minute for each app, and the checks the app editor makes while the app is open count too. A check that arrives within a minute of the last read is accepted and doesn't read the branch again, so it can miss a commit that landed after that read. Retrying the same check is safe. If the commit you merged isn't the one `active_generation` shows after a minute, call this endpoint again. A check made while the app's first setup is still running is also accepted and does nothing. An update already in progress isn't interrupted, and the newest commit is built after it. This endpoint is limited to 30 requests per minute per user, reported in the `X-RateLimit-*` headers. This endpoint accepts a personal API key or personal access token belonging to a user with editor access to the app. A read-only key is refused, and workspace API keys are not accepted. Send credentials in a header: an `api_key` query parameter is refused. ## OpenAPI ````yaml /developers/references/app-management/app-management-openapi.json post /api/apps/{app_id}/imported/main-update/check openapi: 3.1.0 info: title: Base44 App Management API version: 1.0.0 servers: - url: https://app.base44.com security: - PersonalAccessTokenAuth: [] paths: /api/apps/{app_id}/imported/main-update/check: post: summary: Check for main sandbox updates description: >- This API is in beta. Endpoints, fields, and behavior may still change, so avoid depending on it in production. Asks Base44 to check the branch the app was imported from and update the main sandbox if it moved. The request returns before the update runs, so poll [Get main sandbox update status](/api-reference/get-main-sandbox-update-status) to follow it. Base44 reads the branch at most once a minute for each app, and the checks the app editor makes while the app is open count too. A check that arrives within a minute of the last read is accepted and doesn't read the branch again, so it can miss a commit that landed after that read. Retrying the same check is safe. If the commit you merged isn't the one `active_generation` shows after a minute, call this endpoint again. A check made while the app's first setup is still running is also accepted and does nothing. An update already in progress isn't interrupted, and the newest commit is built after it. This endpoint is limited to 30 requests per minute per user, reported in the `X-RateLimit-*` headers. This endpoint accepts a personal API key or personal access token belonging to a user with editor access to the app. A read-only key is refused, and workspace API keys are not accepted. Send credentials in a header: an `api_key` query parameter is refused. operationId: check_api_apps__app_id__imported_main_update_check_post parameters: - name: app_id in: path required: true schema: type: string description: ID of the imported app whose main sandbox to read or update. title: App Id description: ID of the imported app whose main sandbox to read or update. example: 6820f3a4e7b91d003c45a1f2 responses: '202': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/AcceptedResponse' '401': description: >- `unauthenticated`: Missing or invalid credentials, or credentials sent as an `api_key` query parameter. content: application/json: schema: $ref: '#/components/schemas/StandardErrorEnvelope' '403': description: >- `forbidden`: You don't have editor access to this app, your API key is read-only, or you used a workspace API key. content: application/json: schema: $ref: '#/components/schemas/StandardErrorEnvelope' '404': description: '`not_found`: The app doesn''t exist or isn''t an imported app.' content: application/json: examples: not_found: summary: not_found value: error: code: not_found message: Not found details: {} schema: $ref: '#/components/schemas/StandardErrorEnvelope' '429': description: >- `rate_limited`: More than 30 requests in a minute. Retry after `Retry-After` seconds. content: application/json: schema: $ref: '#/components/schemas/StandardErrorEnvelope' security: - PersonalAccessTokenAuth: - full_access components: schemas: AcceptedResponse: properties: accepted: type: boolean title: Accepted description: 'Always `true`: the check was accepted.' default: true example: true type: object title: AcceptedResponse StandardErrorEnvelope: properties: error: $ref: '#/components/schemas/StandardError' description: What went wrong. type: object required: - error title: StandardErrorEnvelope description: The error body returned in the standard envelope. StandardError: properties: code: type: string title: Code description: >- Stable machine-readable cause of the failure. Match on this, not on `message`. example: not_found message: type: string title: Message description: Human-readable explanation. It isn't a stable contract. example: App not found details: additionalProperties: true type: object title: Details description: >- Structured context for the failure, or an empty object when there's none. example: {} type: object required: - code - message title: StandardError securitySchemes: PersonalAccessTokenAuth: type: http scheme: bearer description: >- Personal access token, sent as `Authorization: Bearer `. Each operation lists the permission it needs: `read_only` or `full_access`. A full-access token can call every operation. A read-only token can call only the operations that list `read_only`; anything else returns 403 `read_only_credential_route_not_allowed`. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.