---
title: "PATCH /api/memory-trackers/{memoryTracker}/property-key"
method: PATCH
path: "/api/memory-trackers/{memoryTracker}/property-key"
tags: ["memory-tracker-controller"]
---

# PATCH /api/memory-trackers/{memoryTracker}/property-key

`PATCH /api/memory-trackers/{memoryTracker}/property-key`

## Path parameters

- `memoryTracker` integer, required

## Request body

- UpdateMemoryTrackerPropertyKeyDTO — Rename a property memory tracker's frontmatter key in place.
  - `propertyKey` string, required — New frontmatter property key for this tracker

## Response `200`

OK

## Changes

- **2026-08-20** `405d22528fd9` — 1 warning, 1 info
  - removed the optional property `latestTutorFeedbackScore` from the response with the `200` status
  - added the optional property `latestTutorFeedbackGrade` to the response with the `200` status
- **2026-08-16** `ac082a70e578` — 1 info
  - added the optional property `difficulty` to the response with the `200` status
- **2026-08-15** `80b350ff0ad1` — 1 warning, 1 info
  - removed the optional property `forgettingCurveIndex` from the response with the `200` status
  - added the optional property `stability` to the response with the `200` status
- **2026-08-08** `f04215d476a6` — 1 info
  - added the optional property `latestTutorFeedbackScore` to the response with the `200` status
- **2026-08-07** `5806a690d846` — 1 info
  - added the optional property `type` to the response with the `200` status

[Full history](https://skmtc.dev/nerds-odd-e/apis/openapi-definition/changes/api/memory-trackers/:memoryTracker/property-key/patch.md)

---

[API](https://skmtc.dev/nerds-odd-e/apis/openapi-definition.md) · [All operations](https://skmtc.dev/nerds-odd-e/apis/openapi-definition/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/nerds-odd-e/openapi-definition/revisions/44ef688a3dcd/schema)