---
title: "Changes to Foundational Time Series Model Multi Series Finetuning"
method: POST
path: "/v2/finetune"
---

# Changes to Foundational Time Series Model Multi Series Finetuning

`POST /v2/finetune`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 1 of 10 revisions.

- **2026-06-30** `9da3f4939623` — 1 breaking, 1 warning, 8 info

## Changes

- **2026-06-30** `9da3f4939623` — 1 breaking, 1 warning, 8 info
  - the `model` request property type/format changed from ``/`` to `string`/``
  - the `finetune_steps` request property's min was set to `0.00`
  - added the new optional request property `hist_exog`
  - added the new optional request property `model_parameters`
  - added the new optional request property `multivariate`
  - added the new optional request property `series/X`
  - added the new optional request property `series/X_future`
  - added the new optional request property `series/categorical_exog`
  - added the optional property `detail/items/ctx` to the response with the `422` status
  - added the optional property `detail/items/input` to the response with the `422` status

---

[Operation](https://skmtc.dev/nixtla/apis/nixtla-forecast-api/docs/v2/finetune/post.md) · [API](https://skmtc.dev/nixtla/apis/nixtla-forecast-api.md) · [Page](https://skmtc.dev/nixtla/apis/nixtla-forecast-api/changes/v2/finetune/post)