---
method: PUT
path: /api/media-items/:id/bookmarks/:bookmarkId
auth: jwt
area: media-items
---
<!-- source: internal/handlers/media.go:2252 MediaHandler.UpdateMediaBookmark -->

# Update Media Bookmark

Edits a bookmark through the sync service: lands as a proper last-write-wins
edit with `source`/`modified_at` bookkeeping. Zero-valued locator fields
coalesce with the stored row (omitted fields keep their values).

## Example request

```json example-request
{
  "title": "Chapter 3 (renamed)",
  "notes": "updated note",
  "position": "kindle:pos:1:2"
}
```

## Example response

```json example-response
{
  "id": "110e8400-e29b-41d4-a716-446655440000",
  "media_item_id": "550e8400-e29b-41d4-a716-446655440000",
  "user_id": "92413c3a-e1b8-4fff-b3f9-95c74478d19a",
  "page_number": null,
  "chapter_number": null,
  "cfi_position": "epubcfi(/6/4)",
  "title": "Chapter 3 (renamed)",
  "position": "kindle:pos:1:2",
  "notes": "updated note",
  "created_at": "2026-10-24T13:57:01Z",
  "dedup_key": "kindle:pos:1:2",
  "last_modified_at": "2026-10-24T14:57:01Z",
  "last_modified_source": "web",
  "device_sync_data": null,
  "percentage_location": 35.5,
  "epubcfi_location": "epubcfi(/6/4)",
  "chapter_reference": 3,
  "deleted": false,
  "deleted_at": null,
  "origin_source": "web"
}
```

## Request fields

| Field | Type | Required | Notes |
| ----- | ---- | -------- | ----- |
| title | string | yes | 1–255 chars |
| notes | string | no | |
| position | string | no | |
| cfi_position | string | no | zero value preserves stored |
| page_number | number | no | zero value preserves stored |
| chapter_number | number | no | zero value preserves stored |
| percentage | number | no | zero value preserves stored |
| chapter_reference | number | no | zero value preserves stored |
| origin | string | no | client label |

## Errors

| Status | Body | When |
| ------ | ---- | ---- |
| 400 | `{"error": "invalid bookmark id"}` / `{"error": "invalid media item id"}` / `{"error": "invalid request"}` | malformed |
| 500 | `{"error": "..."}` | annotation service failure |