---
title: "POST /api/packages/manifest"
method: POST
path: "/api/packages/manifest"
---

# POST /api/packages/manifest

`POST /api/packages/manifest`

## Request

- The document declares no server URL.
- Auth: none declared. Required headers: `Marimo-Session-Id`

## Headers

- `Marimo-Session-Id` string, required

## Request body

- UpdateManifestRequest
  - `contents` string, required
  - `fileKey` string, nullable
  - `previous` string, required

## Response `200`

Save notebook metadata without changing its cells

- SandboxResponse
  - `backend` 'pixi' | 'uv', nullable, required
  - `filename` string, nullable, required
  - `manifest` string, nullable, required

## Changes

- **2026-09-16** `12f82c2f6012`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/marimo-team/apis/marimo-api/changes/api/packages/manifest/post.md)

---

[API](https://skmtc.dev/marimo-team/apis/marimo-api.md) - [All operations](https://skmtc.dev/marimo-team/apis/marimo-api/llms.txt) - [OpenAPI document](https://skmtc.dev/marimo-team/apis/marimo-api/revisions/b666dc63885f?raw)