> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slate.inc/llms.txt
> Use this file to discover all available pages before exploring further.

# Concatenate files into a single PDF

> Combine the provided files into a new PDF and return a time-limited download URL.



## OpenAPI

````yaml /api-reference/files/openapi.yaml post /v1/files/concat
openapi: 3.0.0
info:
  title: Files & Requests API
  version: 1.2.0
  description: >
    Manage evidence and claims requests, attach exhibits, fill state-specific
    templates, generate PDF files, run PDF redaction jobs, and store and
    retrieve a matter's files and media.
  contact:
    name: Slate API Support
    email: api-support@slate.inc
    url: https://slate.inc
servers:
  - url: https://api.slate.inc/files
    description: Production
  - url: https://api.uat.slate.inc/files
    description: UAT (staging)
security:
  - bearerAuth: []
tags:
  - name: Requests
    description: Create, read, update, and generate evidence and claims requests
  - name: Exhibits
    description: Upload, download, and delete exhibits
  - name: Files
    description: Files and media associated with a matter
  - name: Redactions
    description: Asynchronous PDF redaction jobs
  - name: Bulk Downloads
    description: Asynchronous bulk download jobs
paths:
  /v1/files/concat:
    post:
      tags:
        - Files
      summary: Concatenate files into a single PDF
      description: >-
        Combine the provided files into a new PDF and return a time-limited
        download URL.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FileConcatRequest'
      responses:
        '200':
          description: Time-limited download URL for the concatenated PDF
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FileConcatResponse'
        '400':
          description: Invalid concat request parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized or invalid permissions
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: One or more files were not found or access is denied
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    FileConcatRequest:
      type: object
      required:
        - files
      properties:
        download:
          description: >-
            Whether the file URL should be served for download or inline
            viewing; defaults to viewing
          type: boolean
          default: false
        files:
          type: array
          minItems: 1
          items:
            type: string
            format: uuid
    FileConcatResponse:
      type: object
      required:
        - downloadUrl
      properties:
        downloadUrl:
          type: string
          format: uri
        nonPdfFiles:
          type: array
          items:
            $ref: '#/components/schemas/NonPdfFile'
    Error:
      type: object
      required:
        - message
        - reason
      properties:
        message:
          type: string
          description: A human readable error message
        reason:
          $ref: '#/components/schemas/ErrorReason'
    NonPdfFile:
      type: object
      required:
        - fileId
        - fileName
        - downloadUrl
        - detectedMimeType
      properties:
        fileId:
          type: string
          format: uuid
        fileName:
          type: string
        downloadUrl:
          type: string
          format: uri
        detectedMimeType:
          type: string
    ErrorReason:
      type: string
      enum:
        - MISSING_TOKEN_OR_PERMISSIONS
        - NO_MATCHING_TRIGGER
        - OWNER_REQUIRED
        - FILE_REQUEST_NOT_PENDING
        - DUPLICATE_FILE_REQUEST
        - TEMPLATE_TYPE_REQUIRED
        - TEMPLATE_INDEX_REQUIRED
        - INVALID_MATTER_ID
        - MATTER_ID_REQUIRED
        - MATTER_NOT_FOUND
        - FILES_LIST_EMPTY
        - TOO_MANY_FILES
        - FILE_NAME_REQUIRED
        - FILE_NAME_MUST_BE_PDF
        - INVALID_FILE_TYPE
        - INVALID_TEMPLATE_IDENTIFIER
        - GENERATION_FAILED
        - EXHIBIT_ORDER_REQUIRED
        - CRID_REQUIRED
        - INVALID_FILE_NAME
        - ARTIFACT_TAG_NOT_FOUND
        - INVALID_LIMIT
        - INVALID_CURSOR
        - INVALID_ORDER_BY
        - MISSING_FILTER_DEPENDENCY
        - INVALID_FILTER
        - REQUEST_BODY_REQUIRED
        - INVALID_LABEL_RANGE
        - INVALID_REDACTION_RULE
        - REDACTION_NOT_FOUND
        - REDACTION_NOT_READY
        - FILE_UPLOAD_PENDING
        - BULK_DOWNLOAD_NOT_FOUND
        - BULK_DOWNLOAD_NOT_READY
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        Cognito-issued JWT access token. Send it as `Authorization: Bearer
        <token>`.

````