---
title: "Changes to POST /api/kernel/set_model_value"
method: POST
path: "/api/kernel/set_model_value"
---

# Changes to POST /api/kernel/set_model_value

`POST /api/kernel/set_model_value`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 91 revisions.

- **2026-03-31** `41bba414df27`: 2 breaking
- **2026-03-18** `f29fa637d35b`: 2 info

## Changes

- **2026-03-31** `41bba414df27`: 2 breaking
  - the `buffers/items/` request property format changed from no format to `base64`
  - the `modelId` request property format changed from no format to `widget-model-id`
- **2026-03-18** `f29fa637d35b`: 2 info
  - the `buffers/items/` request property format was generalized from `base64` to no format
  - the `modelId` request property format was generalized from `widget-model-id` to no format

---

[Operation](https://skmtc.dev/marimo-team/apis/marimo-api/docs/api/kernel/set_model_value/post.md) - [API](https://skmtc.dev/marimo-team/apis/marimo-api.md) - [Page](https://skmtc.dev/marimo-team/apis/marimo-api/changes/api/kernel/set_model_value/post)