---
title: "Save a new version of your page's code"
description: "Only a page you own."
canonical: "https://gtable.app/docs/app-api/my/pages-code-set"
updated: "2026-10-05"
---

# Save a new version of your page's code

`PUT https://your-suite.gtable.app/your-app/v1/pages/{pageId}/code`

Only a page you own.

> **Note: Generic contract**
>
> Your own version of this operation, with your tables and the fields you can read, is in
> your app's document: `https://{suite}.gtable.app/{app}/v1/openapi.json`, behind your credential.
> [Why each person gets their own](/docs/start/studio-and-runtime#why-an-app-has-an-api-of-its-own).

Never overwrites: every save is a version. A note says why, for the history. Send `baseVersion` (the version you read) to be refused with 409 if somebody saved since.

Requires the `pages:write` scope. Operation `my.pages.code.set`. MCP tool `my_pages_code_set`. CLI, once published: `gtable my pages code set`.

## Path parameters

| Name     | Type   | Required | Description |
| -------- | ------ | -------- | ----------- |
| `pageId` | string | yes      |             |

## Headers

| Name              | Type   | Required | Description                                                                                                                                                                                                                                                        |
| ----------------- | ------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `Idempotency-Key` | string | no       | Any unique string. Sending the same key with the same request again returns the first response (marked `Idempotency-Replayed: true`) instead of running it twice. Reusing it for a different request is refused with 409. Kept for 24 hours. Up to 255 characters. |

## Request body

| Field         | Type                                        | Required | Description              |
| ------------- | ------------------------------------------- | -------- | ------------------------ |
| `source`      | string                                      | yes      | Up to 400000 characters. |
| `note`        | string                                      | no       | Up to 200 characters.    |
| `via`         | "assistant" or "hand" or "api" or "restore" | no       |                          |
| `baseVersion` | integer                                     | no       | At least 0.              |