---
title: "Changes to Foundational Time Series Model Online Multi Series Anomaly Detector"
method: POST
path: "/v2/online_anomaly_detection"
---

# Changes to Foundational Time Series Model Online Multi Series Anomaly Detector

`POST /v2/online_anomaly_detection`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 3 of 11 revisions.

- **2026-09-01** `015ac23a238a` — 1 info
- **2026-08-07** `a3b589142eba` — 1 warning
- **2026-06-30** `9da3f4939623` — 1 breaking, 10 info

## Changes

- **2026-09-01** `015ac23a238a` — 1 info
  - added the new optional request property `series/start_datetime`
- **2026-08-07** `a3b589142eba` — 1 warning
  - removed the request property `feature_contributions`
- **2026-06-30** `9da3f4939623` — 1 breaking, 10 info
  - the `model` request property type changed from no type to `string`
  - added the new optional request property `feature_contributions`
  - 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 `refit`
  - added the new optional request property `series/X_future`
  - added the new optional request property `series/categorical_exog`
  - request property `series/X/anyOf[subschema #1]/items/items/` list-of-types was widened by adding types `string` to media type `application/json`
  - 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/online_anomaly_detection/post.md) · [API](https://skmtc.dev/nixtla/apis/nixtla-forecast-api.md) · [Page](https://skmtc.dev/nixtla/apis/nixtla-forecast-api/changes/v2/online_anomaly_detection/post)