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bookhoard/docs/developer/api/koreader/resolve_book.md
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john-okeefe 91c8be8562 docs(api): document the KOReader resolve endpoint
Add koreader/resolve_book.md for GET /api/sync/koreader/resolve, list
the endpoint in the API reference, and describe the resolve-then-pull-
then-push linking flow in the KOReader protocol page — including why a
device pushing to bootstrap its identity creates progress conflicts for
books already mid-read from other sources.
2026-08-22 09:57:44 -04:00

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Markdown

# Resolve Book
Map a book's file SHA-256 to its Bookhoard UUID without touching progress
state. Used by devices to link a freshly downloaded book before their first
pull, so the device's first-page position is never pushed (which would
conflict with server-side progress for books already mid-read).
**Endpoint**: `GET /api/sync/koreader/resolve`
**Auth**: Required (Device authentication)
## Query Parameters
| Parameter | Type | Required | Description |
| --------- | ------ | -------- | ------------------------------------ |
| sha256 | string | Yes | File content hash (64 hex characters) |
Resolution is format-aware: the hash is checked against both
`media_items.file_sha256` and `media_item_formats.file_sha256`, so a
converted file (KEPUB/PDF) matches its media item too.
## Device Authentication
This endpoint requires device authentication (not user JWT). Devices
authenticate using their device credentials.
### Example Request
```http
GET /api/sync/koreader/resolve?sha256=e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Authorization: Bearer {device_token}
```
## Response (200 OK)
```json
{
"book_uuid": "550e8400-e29b-41d4-a716-446655440000",
"sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"title": "Book Title",
"author": "Author Name"
}
```
## Error Responses
| Code | Description |
| ---- | -------------------------------------------- |
| 400 | Missing or malformed `sha256` parameter |
| 401 | Device authentication failed |
| 404 | No book in the library matches the given hash |