---
title: "Update Collection"
method: PATCH
path: "/v2/collections/{collection_id}"
tags: ["external", "external-v2"]
---

# Update Collection

`PATCH /v2/collections/{collection_id}`

Update metadata for a collection by ID.
Use this endpoint to rename a collection by setting `title`.
This endpoint updates only provided fields (`title`, `description`) and leaves omitted fields unchanged.
For read-only retrieval, use `GET /v2/collections/{collection_id}`.

## Path parameters

- `collection_id` string, uuid, required — UUID of the collection to update. Use an ID returned by create/list/search. The caller must be able to edit this collection.

## Request body

- UpdateCollectionRequestSchema
  - `description` string, nullable — Optional descriptive text for collection scope or intent. Maximum: 10,000 characters (and no more than 10,000 UTF-8 bytes).
  - `title` string, nullable — Human-readable collection title. Use a stable label suitable for navigation and exact title matching. Maximum: 1,000 characters (and no more than 1,000 UTF-8 bytes).
  - `updated_at` string, date-time, nullable — Optional "last updated" timestamp for this write (ISO 8601). If provided, it must include a timezone offset and cannot be in the future. If omitted, the current server time is used.

## Response `200`

OK

- UpdateCollectionResponseSchema
  - `created_at` string, date-time, required — Creation timestamp for the collection in ISO 8601 format.
  - `description` string, nullable, required — Optional description text currently stored on the collection.
  - `id` string, uuid, required — UUID of the updated collection.
  - `request_id` string, required — Identifier for this API request. Useful for tracing and support.
  - `title` string, required — Current title of the collection after the update.
  - `updated_at` string, date-time, required — Last modification timestamp for the collection in ISO 8601 format.

---

[API](https://skmtc.net/mem/apis/mem-api.md) · [All operations](https://skmtc.net/mem/apis/mem-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/mem/mem-api/versions/4023cb07f31f/schema)