Matter Items API

openapi: 3.2.0
info:
  title: Matter Account Items API
  version: '1.0'
  description: 'The Matter API lets you read, save, and organize content in your Matter library.


    Every request requires a [Bearer token](/api/authentication) and an active

    Matter Pro subscription.

    '
  contact:
    email: hello@getmatter.com
    url: https://getmatter.com
servers:
- url: https://api.getmatter.com/public
  description: Production
security:
- bearerAuth: []
tags:
- name: Items
  description: Articles, podcasts, videos, PDFs, and tweets in your library.
paths:
  /v1/items:
    get:
      operationId: listItems
      summary: List items
      description: Returns a paginated list of items in your library.
      tags:
      - Items
      parameters:
      - name: status
        in: query
        description: 'Filter by item status. Comma-separated for multiple values.

          '
        schema:
          type: string
          default: all
          enum:
          - all
          - inbox
          - queue
          - archive
      - name: order
        in: query
        description: 'Sort order. `updated` sorts by last-updated timestamp (default, best for sync). `library_position` sorts by the item''s manual queue ordering (queue_order). `inbox_position` sorts by the item''s feed position (newest first). Neither position ordering requires a status filter — items without a position sort last (nulls last).

          '
        schema:
          type: string
          default: updated
          enum:
          - updated
          - library_position
          - inbox_position
      - name: is_favorite
        in: query
        description: Filter to favorited items only.
        schema:
          type: boolean
      - name: tag
        in: query
        description: 'Filter to items with a specific tag ID. Comma-separated for multiple (matches **any**).

          '
        schema:
          type: string
          example: tag_n5j2x,tag_k3m9p
      - name: content_type
        in: query
        description: 'Filter by content type. Comma-separated for multiple.

          '
        schema:
          type: string
          enum:
          - article
          - podcast
          - pdf
          - tweet
      - name: updated_since
        in: query
        description: 'ISO 8601 timestamp. Return only items updated after this time. Useful for incremental sync.

          '
        schema:
          type: string
          format: date-time
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/cursor'
      responses:
        '200':
          description: Paginated list of items.
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
          content:
            application/json:
              schema:
                allOf:
                - $ref: '#/components/schemas/PaginatedList'
                - type: object
                  properties:
                    results:
                      type: array
                      items:
                        $ref: '#/components/schemas/Item'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/ProRequired'
        '429':
          $ref: '#/components/responses/RateLimited'
    post:
      operationId: createItem
      summary: Save item
      description: 'Save a new item to your library by URL. Triggers background content

        extraction. Check `processing_status` to know when the item is ready.


        About 40% of saves complete instantly (cached content). For the rest,

        processing typically takes 20–60 seconds.

        '
      tags:
      - Items
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - url
              properties:
                url:
                  type: string
                  format: uri
                  description: The URL to save. Must be a valid `http://` or `https://` URL.
                  example: https://paulgraham.com/greatwork.html
                status:
                  type: string
                  enum:
                  - queue
                  - archive
                  default: queue
                  description: Where to place the item.
      responses:
        '201':
          description: Item saved.
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/ProRequired'
        '422':
          $ref: '#/components/responses/ValidationError'
        '429':
          $ref: '#/components/responses/RateLimited'
  /v1/items/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: The item ID (e.g. `itm_r9f3a`).
      schema:
        type: string
        pattern: ^itm_[0-9A-Za-z]+$
    get:
      operationId: getItem
      summary: Get item
      description: Returns a single item from your library with full metadata.
      tags:
      - Items
      parameters:
      - name: include
        in: query
        description: 'Comma-separated list of additional fields. Currently supported: `markdown`. Markdown requests count against the content rate limit (20/min).

          '
        schema:
          type: string
          example: markdown
      responses:
        '200':
          description: Item detail.
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/ProRequired'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
    patch:
      operationId: updateItem
      summary: Update item
      description: Update an item's status, favorite state, or reading progress.
      tags:
      - Items
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                status:
                  type: string
                  enum:
                  - queue
                  - archive
                  description: Move the item to `queue` or `archive`.
                is_favorite:
                  type: boolean
                  description: Set to `true` to favorite, `false` to unfavorite.
                reading_progress:
                  type: number
                  format: float
                  minimum: 0
                  maximum: 1
                  description: Reading progress as a float from `0.0` to `1.0`.
      responses:
        '200':
          description: Updated item.
          headers:
            X-RateLimit-Limit:
              $ref: '#/components/headers/X-RateLimit-Limit'
            X-RateLimit-Remaining:
              $ref: '#/components/headers/X-RateLimit-Remaining'
            X-RateLimit-Reset:
              $ref: '#/components/headers/X-RateLimit-Reset'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Item'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/ProRequired'
        '404':
          $ref: '#/components/responses/NotFound'
        '422':
          $ref: '#/components/responses/ValidationError'
        '429':
          $ref: '#/components/responses/RateLimited'
    delete:
      operationId: deleteItem
      summary: Delete item
      description: Permanently remove an item from your library.
      tags:
      - Items
      responses:
        '204':
          description: Item deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/ProRequired'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    NotFound:
      description: Resource not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: not_found
              message: The requested resource was not found.
    RateLimited:
      description: Rate limit exceeded.
      headers:
        Retry-After:
          description: Seconds to wait before retrying.
          schema:
            type: integer
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: rate_limited
              message: Rate limit exceeded. Retry after 12 seconds.
    ProRequired:
      description: Active Matter Pro subscription required.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: pro_required
              message: A Matter Pro subscription is required to use the API.
    ValidationError:
      description: Request validation failed.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: validation_error
              message: The url field is required.
              field: url
    Unauthorized:
      description: Invalid or missing API token.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: authentication_required
              message: A valid API token is required.
  parameters:
    limit:
      name: limit
      in: query
      description: Number of results per page. Min 1, max 100.
      schema:
        type: integer
        default: 25
        minimum: 1
        maximum: 100
    cursor:
      name: cursor
      in: query
      description: Opaque cursor for the next page of results, from a previous `next_cursor`.
      schema:
        type: string
  headers:
    X-RateLimit-Reset:
      description: Unix timestamp (seconds) when the window resets.
      schema:
        type: integer
    X-RateLimit-Limit:
      description: Maximum requests allowed in the current window.
      schema:
        type: integer
    X-RateLimit-Remaining:
      description: Requests remaining in the current window.
      schema:
        type: integer
  schemas:
    Error:
      type: object
      required:
      - error
      properties:
        error:
          type: object
          required:
          - code
          - message
          properties:
            code:
              type: string
              description: Machine-readable error code.
            message:
              type: string
              description: Human-readable error message.
            field:
              type: string
              description: The request field that caused the error, if applicable.
    Tag:
      type: object
      required:
      - object
      - id
      - name
      - item_count
      - created_at
      properties:
        object:
          type: string
          const: tag
        id:
          type: string
          description: Prefixed tag ID (e.g. `tag_n5j2x`).
          example: tag_n5j2x
        name:
          type: string
          example: essays
        item_count:
          type: integer
          description: Number of items with this tag.
          example: 42
        created_at:
          type: string
          format: date-time
          example: '2025-01-15T10:00:00Z'
    PaginatedList:
      type: object
      required:
      - object
      - results
      - has_more
      properties:
        object:
          type: string
          const: list
        results:
          type: array
          items: {}
        has_more:
          type: boolean
          description: Whether there are more results after this page.
        next_cursor:
          type: string
          nullable: true
          description: Cursor to fetch the next page. `null` when there are no more results.
    Author:
      type: object
      required:
      - object
      - id
      - name
      properties:
        object:
          type: string
          const: author
        id:
          type: string
          description: Prefixed author ID (e.g. `aut_p4w7q`).
          example: aut_p4w7q
        name:
          type: string
          example: Paul Graham
    Item:
      type: object
      required:
      - object
      - id
      - title
      - url
      - status
      - processing_status
      - is_favorite
      - content_type
      - reading_progress
      - tags
      - updated_at
      properties:
        object:
          type: string
          const: item
        id:
          type: string
          description: Prefixed item ID (e.g. `itm_r9f3a`).
          example: itm_r9f3a
        title:
          type: string
          example: How to Do Great Work
        url:
          type: string
          format: uri
          example: https://paulgraham.com/greatwork.html
        site_name:
          type: string
          description: The source website name.
          example: paulgraham.com
        author:
          oneOf:
          - $ref: '#/components/schemas/Author'
          - type: 'null'
          description: The item's author, if known.
        status:
          type: string
          nullable: true
          enum:
          - inbox
          - queue
          - archive
          description: 'Status: `inbox`, `queue`, or `archive`. `null` when the item has no status (e.g. search results for content the user has not saved).

            '
          example: queue
        processing_status:
          type: string
          enum:
          - processing
          - completed
          - failed
          description: Content extraction status.
          example: completed
        is_favorite:
          type: boolean
          example: false
        content_type:
          type: string
          enum:
          - article
          - podcast
          - pdf
          - tweet
          description: The type of content.
          example: article
        word_count:
          type: integer
          nullable: true
          description: Estimated word count. `null` for non-text content.
          example: 11842
        reading_progress:
          type: number
          format: float
          minimum: 0
          maximum: 1
          description: Reading progress from `0.0` to `1.0`.
          example: 0.35
        image_url:
          type: string
          format: uri
          nullable: true
          description: URL of the item's hero image, if available.
        excerpt:
          type: string
          nullable: true
          description: Short excerpt or description of the item.
        markdown:
          type: string
          nullable: true
          description: 'Parsed article body as markdown. Only included when `?include=markdown` is set.

            '
        library_position:
          type: integer
          format: int64
          nullable: true
          description: 'The item''s position in the library (queue/archive). Non-null when the item has a library entry. Higher values are closer to the top. Use this field to sort items in library order locally.

            '
          example: 58974321000
        inbox_position:
          type: integer
          nullable: true
          description: 'The item''s 0-based index in the inbox feed. Non-null when the item is in the inbox. Lower values are closer to the top. Use this field to sort items in inbox order locally.

            '
          example: 0
        tags:
          type: array
          items:
            $ref: '#/components/schemas/Tag'
        updated_at:
          type: string
          format: date-time
          description: 'Last change to this item or its associated data (status, reading progress, favorites, tags, annotations, or content re-extraction).

            '
          example: '2026-03-30T19:15:00Z'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Personal API token with `mat_` prefix. Generate one at https://web.getmatter.com/settings.

        '