> ## Documentation Index > Fetch the complete documentation index at: https://komga-sdk.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # List duplicate books > Return books that have the same file hash. Required role: **ADMIN** ## OpenAPI ````yaml https://raw.githubusercontent.com/gotson/komga/1.25.0/komga/docs/openapi.json get /api/v1/books/duplicates openapi: 3.1.0 info: description: >- Komga REST API. ## Reference Check the API reference: - on the [Komga website](https://komga.org/docs/openapi/komga-api) - on any running Komga instance at `/swagger-ui.html` - on [GitHub](https://raw.githubusercontent.com/gotson/komga/refs/heads/master/komga/docs/openapi.json) ## Authentication Most endpoints require authentication. Authentication is done using either: - Basic Authentication - Passing an API Key in the `X-API-Key` header ## Sessions Upon successful authentication, a session is created, and can be reused. - By default, a `KOMGA-SESSION` cookie is set via `Set-Cookie` response header. This works well for browsers and clients that can handle cookies. - If you specify a header `X-Auth-Token` during authentication, the session ID will be returned via this same header. You can then pass that header again for subsequent requests to reuse the session. If you need to set the session cookie later on, you can call `/api/v1/login/set-cookie` with `X-Auth-Token`. The response will contain the `Set-Cookie` header. ## Remember Me During authentication, if a request parameter `remember-me` is passed and set to `true`, the server will also return a `komga-remember-me` cookie. This cookie will be used to login automatically even if the session has expired. ## Logout You can explicitly logout an existing session by calling `/api/logout`. This would return a `204`. ## Deprecation API endpoints marked as deprecated will be removed in the next major version. license: name: MIT url: https://github.com/gotson/komga/blob/master/LICENSE title: Komga API version: 1.25.0 servers: - url: https://demo.komga.org description: Demo server - url: http://localhost:{port} description: Local development server variables: port: enum: - '8080' - '25600' default: '25600' security: - basicAuth: [] - apiKey: [] tags: - name: Deprecated - description: Manage libraries. name: Libraries - description: Manage series. name: Series - description: Manage posters for series. name: Series Poster - description: Manage books. name: Books - description: Manage posters for books. name: Book Poster - name: Book Pages - name: WebPub Manifest - name: Import - description: Provide font files and CSS for the Epub Reader. name: Fonts - description: Manage duplicate pages. Duplicate pages are identified by a page hash. name: Duplicate Pages - description: Manage collections. name: Collections - description: Manage posters for collections. name: Collection Poster - name: Collection Series - description: Manage readlists. name: Readlists - description: Manage posters for readlists. name: Readlist Poster - name: Readlist Books - description: Retrieve referential metadata from all items in the Komga server. name: Referential metadata - description: Manage current user. name: Current user - description: Manage users. name: Users - description: Manage API Keys name: API Keys - name: User session - description: List registered OAuth2 providers name: OAuth2 - description: Sync points are automatically created during a Kobo sync. name: Sync points - description: Claim a freshly installed Komga server. name: Claim - description: Manage server tasks name: Tasks - description: Server events history name: History - description: List files from the host server's file system name: File system - description: Store and retrieve server settings name: Server settings - description: Retrieve releases information name: Releases - description: Retrieve announcements from the Komga website name: Announcements - description: Manage server name: Management - name: Mihon - name: ComicRack - description: >- Store and retrieve global and per-user settings. Those settings are not used by Komga itself, but can be stored for convenience by client applications. name: Client settings externalDocs: description: Komga documentation url: https://komga.org paths: /api/v1/books/duplicates: get: tags: - Books summary: List duplicate books description: |- Return books that have the same file hash. Required role: **ADMIN** operationId: getBooksDuplicates parameters: - in: query name: unpaged required: false schema: type: boolean - description: Zero-based page index (0..N) in: query name: page schema: type: integer - description: The size of the page to be returned in: query name: size schema: type: integer - description: >- Sorting criteria in the format: property(,asc|desc). Default sort order is ascending. Multiple sort criteria are supported. in: query name: sort schema: type: array items: type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/PageBookDto' description: OK '400': content: '*/*': schema: $ref: '#/components/schemas/ValidationErrorResponse' description: Bad Request components: schemas: PageBookDto: type: object properties: content: type: array items: $ref: '#/components/schemas/BookDto' empty: type: boolean first: type: boolean last: type: boolean number: type: integer format: int32 numberOfElements: type: integer format: int32 pageable: $ref: '#/components/schemas/PageableObject' size: type: integer format: int32 sort: $ref: '#/components/schemas/SortObject' totalElements: type: integer format: int64 totalPages: type: integer format: int32 ValidationErrorResponse: type: object properties: violations: type: array items: $ref: '#/components/schemas/Violation' required: - violations BookDto: type: object properties: created: type: string format: date-time deleted: type: boolean fileHash: type: string fileLastModified: type: string format: date-time id: type: string lastModified: type: string format: date-time libraryId: type: string media: $ref: '#/components/schemas/MediaDto' metadata: $ref: '#/components/schemas/BookMetadataDto' name: type: string number: type: integer format: int32 oneshot: type: boolean readProgress: $ref: '#/components/schemas/ReadProgressDto' seriesId: type: string seriesTitle: type: string size: type: string sizeBytes: type: integer format: int64 url: type: string required: - created - deleted - fileHash - fileLastModified - id - lastModified - libraryId - media - metadata - name - number - oneshot - seriesId - seriesTitle - size - sizeBytes - url PageableObject: type: object properties: offset: type: integer format: int64 pageNumber: type: integer format: int32 pageSize: type: integer format: int32 paged: type: boolean sort: $ref: '#/components/schemas/SortObject' unpaged: type: boolean SortObject: type: object properties: empty: type: boolean sorted: type: boolean unsorted: type: boolean Violation: type: object properties: fieldName: type: string message: type: string MediaDto: type: object properties: comment: type: string epubDivinaCompatible: type: boolean epubIsKepub: type: boolean mediaProfile: type: string mediaType: type: string pagesCount: type: integer format: int32 status: type: string required: - comment - epubDivinaCompatible - epubIsKepub - mediaProfile - mediaType - pagesCount - status BookMetadataDto: type: object properties: authors: type: array items: $ref: '#/components/schemas/AuthorDto' authorsLock: type: boolean created: type: string format: date-time isbn: type: string isbnLock: type: boolean lastModified: type: string format: date-time links: type: array items: $ref: '#/components/schemas/WebLinkDto' linksLock: type: boolean number: type: string numberLock: type: boolean numberSort: type: number format: float numberSortLock: type: boolean releaseDate: type: string format: date releaseDateLock: type: boolean summary: type: string summaryLock: type: boolean tags: type: array items: type: string uniqueItems: true tagsLock: type: boolean title: type: string titleLock: type: boolean required: - authors - authorsLock - created - isbn - isbnLock - lastModified - links - linksLock - number - numberLock - numberSort - numberSortLock - releaseDateLock - summary - summaryLock - tags - tagsLock - title - titleLock ReadProgressDto: type: object properties: completed: type: boolean created: type: string format: date-time deviceId: type: string deviceName: type: string lastModified: type: string format: date-time page: type: integer format: int32 readDate: type: string format: date-time required: - completed - created - deviceId - deviceName - lastModified - page - readDate AuthorDto: type: object properties: name: type: string role: type: string required: - name - role WebLinkDto: type: object properties: label: type: string url: type: string required: - label - url securitySchemes: basicAuth: scheme: basic type: http apiKey: in: header name: X-API-Key type: apiKey ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.