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Welcome to 4Sync REST API documentation!
The 4Sync API is built to conform to the design principles of Representational State Transfer (REST) and exposes 4Sync resources like files, folders and users that can be accessed and manipulated using the next HTTP methods:
  • POST - creates or updates a resource
  • PUT - updates a resource
  • GET - retrieves a resource or list of resources
  • DELETE - deletes a resource
In general, a list of the resources is available through /{resource name}. To get a specific resource, use /{resource name}/{id}. Subresources, e.g. a list of user's files, can be received through /{resource name}/{id}/{subresource name}.

There are two main API endpoints:
  • https://upload.4sync.com/{api version}/{resource name} - for upload requests
  • https://api.4sync.com/{api version}/{resource name} - for all other requests
The 4Sync API is accessible via HTTPS only. Current API version is v1_2.
The 4Sync API supports xml and json formats. You should set your HTTP Content-Type request header accordingly (application/xml, application/json), though you may also specify the desired format by appending .xml or .json extensions in the resource URI.
Most of the API resources support pagination that in turn is consistent across all API resources that require it. Use offset and limit parameters to page through query results.

Parameter Type Description Required
limit Integer The number of records returned. Min value is 1. Default (and max value) is 100. no
offset Integer The offset of the first record returned. Default is 0. no
Parameter Description
locale This parameter is applicable to all requests and the language of error messages. Default is English. List of supported languages: en, pt-Br, es, ar, fr, pl, fa, tr, in, th, de, it, zh, ja, ko, vi, ms, ru.
addFields This parameter is applicable for all /files resource queries. See /FILES section.
To issue public calls you only need an application's consumer key, otherwise application must be authorized to access resources on behalf of a 4Sync user. OAuth 1.0 is used to receive an access token.

The authorization endpoints include the following ones:

Request token https://api.4sync.com/v1_2/oauth/initiate This endpoint is used for retrieving a Request Token.
Authorize token https://api.4sync.com/v1_2/oauth/authorize This endpoint is used for user authorization.
Access token https://api.4sync.com/v1_2/oauth/token This endpoint is used for retrieving an Access Token.
Getting a Request Token
The first step in authorization process is to retrieve a Request Token from 4Sync. This is a temporary token that later will be exchanged for an Access Token.

RESOURCE /oauth/initiate
DESCRIPTION The first step of authentication. Allows you to obtain a Request Token used for further stages of authentication process.
URL https://api.4sync.com/v1_2/oauth/initiate
METHOD POST
VERSION v1_2
RETURNS Request Token with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE RESPONSE oauth_token=8154603a16d4be654a2c9d60b7b068b4&oauth_token_secret=02e7293ef1f3a9c2aa5da261b2e606d47224aa38&oauth_callback_confirmed=true
User Authorization
The second step is to request user authorization. Upon receipt of a Request Token from 4Sync the authorization page, where an application could be granted the requested access, is displayed. The only required parameter for this step is the Request Token (oauth_token value) received from the previous step. The endpoint is followed by an oauth_token parameter with the value set to the oauth_token value. After an application is granted the access, a user is redirected to the URL specified in the oauth_callback parameter.

RESOURCE /oauth/authorize
DESCRIPTION The second step of authorization. Without user authorization in this step, it is impossible for your application to obtain an Access Token.
URL https://api.4sync.com/v1_2/oauth/authorize
METHOD GET
VERSION v1_2
RETURNS
ERROR See Errors section for details.
EXAMPLE RESPONSE
Getting an Access Token
This is the final step of the authorization process. After an application is granted the access, it needs to exchange the Request Token for an Access Token. For this step, you will need the Request Token (the oauth_token and oauth_token_secret values) (see previous step).

RESOURCE /oauth/token
DESCRIPTION The third step of authorization. Getting an Access Token.
URL https://api.4sync.com/v1_2/oauth/token
METHOD POST
VERSION v1_2
RETURNS An access token and the corresponding access token secret with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE RESPONSE oauth_token=8155603a16d4be954a2c9d60b7b068b4&oauth_token_secret=02e7293ef1f3a9c9aa5da-61b2e606d47524aa38
Resources
User Response
The endpoint is used for managing a user' account.

Attributes Type Description
id String Unique user identifier.
firstName String User's First name.
lastName String User's Last name.
email String Email address, applied by a user to log in.
plan String User's Membership Plan - Free/Premium.
freeSpace Long The amount of space in bytes that is still available in a user's account.
totalSpace Long The total amount of available space in a user's account, in bytes.
uploadSizeLimit Long The maximum size of one file a user can upload to account, in bytes.
rootFolderId String Unique identifier of a root folder in a user's account.
profileUrl String URL provided by the user in association with their profile.
status String A user's status. Can be "locked", "active", "inactive", "trial" or "null".
verified Boolean Indicates that a user has a verified account.
timeZone String A user's time zone.
created Date The time when a user was created.
lastLogin Date The last time when a user signed in to 4Sync.
expiration Date Expiration date of a user's plan.
Example of a user response
    {
      "id": "tow4q9ki",
      "firstName": "  1",
      "lastName": "Petrov",
      "email": "Ga103@anna.4sync.com",
      "plan": "FREE",
      "freeSpace": 10220621999,
      "totalSpace": 16106127360,
      "uploadSizeLimit": 2147483648,
      "rootFolderId": "FA3f-1qd",
      "profileUrl": "https://www.4sync.com/u/tow4q9ki/Ga103.html",
      "status": null,
      "verified": true,
      "timeZone": "GMT+02:00",
      "created": "2015-07-22T12:18:43.000Z",
      "lastLogin": "2016-01-12T13:56:40.000Z",
      "expiration": "2016-07-10T13:56:40.000Z"
    }
Get the information about current user (GET /user)
RESOURCE /user
DESCRIPTION User metainfo endpoint.
URL https://api.4sync.com/v1_2/user
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS UserResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/user?oauth_params
EXAMPLE RESPONSE 
    {
      /*User Response*/
    }
Update user's info (PUT /user)
RESOURCE /user
DESCRIPTION User metainfo update endpoint. Used to update individual or multiple fields in the user entity, including first name, last name, email, time zone and password.
URL https://api.4sync.com/v1_2/user
METHOD PUT (Content-Type:application/x-www-form-urlencoded)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
firstName String New user's First name. Min value: 1 symbol. Max value: 255 symbols. no
lastName String New user's Last name. Min value: 1 symbol. Max value: 255 symbols. no
password String New user's password. Min value: 1 symbols. Max value: 255 symbols. no
email String New valid, non-conflict email. no
timeZone String New Time Zone. Time Zone must match (GMT)(\\+|-)(0|1)([0-9]:)(00|30|45). no
RETURNS UserResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/user?oauth_params

params:
firstName=newValidFirstName&lastName=newValidLastName
EXAMPLE RESPONSE 
    {
      /*User Response*/
    }
Get an avatar of the specified size of a user (GET /user/picture/{type})
Returns a user's avatar of the specified size. Get more information about {type} in GET /files/{id}/thumbnails/{type}.

RESOURCE /user/picture/{type}
DESCRIPTION Retrieves a user's avatar of the specified size.
URL https://api.4sync.com/v1_2/user/picture/{type}
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS Avatar image and HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/user/picture/{type}?oauth_params
EXAMPLE RESPONSE Avatar (default or custom image).
Set an avatar picture for a user (PUT /user/picture)
This method is used to upload an image to be set as a user's avatar picture. Maximum file size is 5 Mb.

RESOURCE /user/picture
DESCRIPTION Set an avatar picture for a user (only for file format gif, jpg, png and maximum size of file 5 Mb).
URL https://upload.4shared.com/v1_2/user/picture
METHOD PUT (Content-Type: application/octet-stream)
VERSION v1_2
REQUEST BODY Required. The file content itself to be uploaded.
RETURNS UserResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://upload.4shared.com/v1_2/user/picture
EXAMPLE RESPONSE 
    {
      /*User Response*/
    }
Get list of files in a user's account (GET /user/files)
RESOURCE /user/files
DESCRIPTION Retrieves a list of files in a user's account. The files are ordered by the upload date. Use filtering to make the request more specific.
URL https://api.4sync.com/v1_2/user/files
METHOD GET
VERSION v1_2
PARAMETERS
Parameter Type Description Required
query String The search string (from 1 to 200 symbols in length). no
limit See Pagination section for details (max value of 100 items is set by default).
offset See Pagination section for details. Default value is 0.
category Integer Is responsible for filtering files based on the specified category. If not specified, search is made in all categories.

Possible values:
1 - Music
2 - Video
3 - Photo
4 - Archives
5 - Books/Office
6 - Programs
7 - Web
8 - Mobile
 no
RETURNS FilesResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/user/files?oauth_params
EXAMPLE RESPONSE 
    {
      files: [
        {/*File response*/}
      ]
    }
Get a list of items from trash (GET /user/trash)
RESOURCE /user/trash
DESCRIPTION Retrieves a list of items from a user's recycle bin.
URL https://api.4sync.com/v1_2/user/trash
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS List of FileResponse/FolderResponse entities with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/user/trash?oauth_params
EXAMPLE RESPONSE 
    {
      folders: [
        {/*Folder response*/}
      ],
      files: [
        {/*File response*/}
      ]
    }
Get information about the requested user's account (GET /users/{id})
RESOURCE /users/{id}
DESCRIPTION Retrieves information about the requested user's account.
URL https://api.4sync.com/v1_2/users/{id}
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS UserResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/users/{id}?oauth_params
EXAMPLE RESPONSE 
    {
      /*User Response*/
    }
Get an avatar of the specified size of the requested user (GET /users/{id}/picture/{type})
Returns an avatar of the requested user of the specified size. Get more information about {type} in GET /files/{id}/thumbnails/{type}.

RESOURCE /users/{id}/picture/{type}
DESCRIPTION Retrieves the user's avatar.
URL https://api.4sync.com/v1_2/users/{id}/picture
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS Avatar image and HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/users/{id}/picture/{type}?oauth_params
EXAMPLE RESPONSE Avatar (default or custom image).
File Response
FileResponse entity contains metadata of a file, information about its owner and its download link. Next fields: description, tags, exif, id3 are not returned by default and must be requested via an additional parameter addFields.

Attributes Type Description
id String File unique identifier.
name String File name.
size Long File size in bytes.
modified Date Last time the file was modified on 4Sync.
description String File description.
tags List <String> All user's tags applied to the file.
path String Folders path to the file, starting at the root.
parentId String Unique identifier of the folder containing a requested file.
downloadPage String File download page url.
ownerId String Unique file owner identifier.
mimeType String Mime type of a file.
exif See EXIF metainfo section Metainfo of image files.
md5 String md5 of a file.
ownerOnly Boolean View permissions for other users.
status String Current status of the file. Possible values are: deleted, incomplete, conflicted, trashed, normal.
virusScanResult String Attribute that indicates whether a file contains a virus.
id3 See id3 metadata section Metadata for music files.
Example of a file response
    {
    "id": "NxLbjwFIba",
    "name": "Tugas 1 Luas dan Volume Balok.rar",
    "size": 302965,
    "modified": "2016-02-03T15:29:16.968Z",
    "description": null,
    "tags": null,
    "path": "/My 4shared/Tugas 1 Luas dan Volume Balok.rar",
    "parentId": "5mByVkpQ",
    "downloadPage": "https://www.4shared.com/file/NxLbjwFIba/Tugas_1_Luas_dan_Volume_Balok.html",
    "ownerId": "9xoGwv8u",
    "mimeType": "application/x-rar-compressed",
    "exif": null,
    "md5": "af9db6f0a15f802cdb6fe56643ec7c92",
    "ownerOnly": false,
    "status": "normal",
    "virusScanResult": "clean",
    "id3": null
    }
Request parameter for file entity
Attributes Type Description Required
addFields String This parameter is applicable for all /files resource queries.
May contain the following values:
  • description
  • tags
  • exif
  • id3
 no
Parameter Type
bitrate Integer
year Integer
track Integer
samplerate Integer
length Integer
genre String
album String
artist String
title String
preciseLength Float
Example of a file response with id3 tags
    {
    "id3": {
        "bitrate": 192,
        "samplerate": 44100,
        "track": 0,
        "year": 0,
        "genre": "Sertanejo",
        "album": "",
        "artist": "Henrique e Juliano",
        "title": "Na hora da raiva",
        "length": 174,
        "preciseLength": 174.23674
      }
    }
Parameter Type
model String
make String
dateTimeOriginal String
width String
height String
latitude String
longitude String
latitudeRef String
longitudeRef String
Example of a file response with EXIF
    {
    "exif": {
       "model": "iPhone 6",
       "make": "Apple",
       "dateTimeOriginal": "2016:02:03 15:22:12",
       "width": "3264",
       "height": "2448",
       "latitude": "40.45783333333333",
       "longitude": "20.513441666666665",
       "latitudeRef": "N",
       "longitudeRef": "E",
       "empty": false
      }
    }
Get information about file (GET /files/{id})
RESOURCE /files/{id}
DESCRIPTION File metainformation endpoint.
URL https://api.4sync.com/v1_2/files/{id}
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Upload file (POST /files)
Uploads a file. File size is limited to 150 MB. To upload larger files, use /upload method. The whole body is treated as file binary data and Content-Type should be set to application/octet-stream.

RESOURCE /files
DESCRIPTION Simple upload file endpoint (only for files less than 150 Mb in size).
URL https://upload.4sync.com/v1_2/files
METHOD POST (Content-Type: application/octet-stream)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String The folder where the file will be uploaded. yes
fileName String The name of the file. Max value: 255 symbols. yes
REQUEST BODY Required. The file content itself to be uploaded.
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://upload.4sync.com/v1_2/files/{id}?oauth_params

params:
folderId=validFolderId&fileName=nonConflictingName
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Upload a large file (POST /upload)
This method used to upload files larger than 150MB in size, in multiple chunks.

RESOURCE /upload
DESCRIPTION Uploads large files in multiple chunks.
May be used to resume uploads.
Starts a new chunk upload process.
Returns file entity including the id of the new file, which should be used to upload file's data.
URL https://upload.4sync.com/v1_2/upload
METHOD POST (Content-Type: application/x-www-form-urlencoded)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
name String File name yes
folderId String Destination directory id yes
size String File size yes
description String File description no (optional)
tags String Comma separated values no (optional)
RETURNS FileResponse entity with HTTP Status 200
ERROR See Errors section for details.
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Upload a large file (POST /upload/{id})
This method used to upload files larger than 150MB in size, in multiple chunks. The whole request body is treated as file binary data and Content-Type should be set to application/octet-stream.

RESOURCE /upload/{id}
DESCRIPTION Uploads a chunk of data. Should be called after retrieving file id (see /upload method).
URL https://upload.4sync.com/v1_2/upload/{id}

id - file id, received from the /upload method
METHOD POST (Content-Type: application/octet-stream)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
Content-Range String Lets the server know which part of the file is being uploaded.

Define in bytes the following way:

Content-Range: bytes {firstByteInclusive}-{lastByteInclusive}/{wholeFileSize} 		yes
Content-Length String Stream length which should exactly match the size of chunk, in bytes. yes
REQUEST BODY Chunk's binary data
RETURNS Returns HTTP Status 201 Created (upon all data chunk upload).
ERROR See Errors section for details.
Get uploaded file status (GET /upload/{id})
This method is used to check the uploaded file status.

RESOURCE /upload/{id}/status
DESCRIPTION Retrieves the number and position of bytes missing in the file. May be used to resume uploads.
URL https://upload.4sync.com/v1_2/upload/{id}/status

id - file id, received from the /upload method
METHOD GET
VERSION v1_2
RETURNS Returns HTTP status code 308 Chunked Upload and "Range" header: "{storedChunkfirstByteInclusive}-{storedChunklastByteInclusive}, ..., {sto redChunkfirstByteInclusive}-{storedChunklastByteInclusive}".

If the file upload was initialized but no data uploaded, the "Range" header will be absent. If the file upload was completed, returns HTTP status code 201 Created
ERROR See Errors section for details.
Update file (PUT /files/{id})
This method is used to upload a new version of an existing file in a user's account. File size is limited to 150 MB. To upload files of larger size /upload method must be used. The whole body is treated as file binary data and Content-Type should be set to application/octet-stream.

RESOURCE /files/{id}
DESCRIPTION Simple update file endpoint (only for files less than 150 Mb in size).
URL https://upload.4sync.com/v1_2/files/{id}
METHOD PUT (Content-Type: application/octet-stream)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String The folder where the file will be uploaded. yes
fileName String The name of the file. Max value: 255 symbols. yes
REQUEST BODY Required. The file content itself to be uploaded.
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://upload.4sync.com/v1_2/files/{id}?oauth_params

params:
folderId=validFolderId&fileName=nonConflictingName
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Update the file info (PUT /files/{id})
Updates the file info, specified by id. Used to update individual or multiple fields in the file entity, including renaming the file, changing its description and adding/changing tags for the file.

RESOURCE /files/{id}
DESCRIPTION File metainfo update endpoint.
URL https://api.4sync.com/v1_2/files/{id}
METHOD PUT (Content-Type: application/json, application/xml, application/x-www-form-urlencoded)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
name String New file name. Max value: 255 symbols. no
description String New file description. Max value: 255 symbols. no
tags String User tags for a file. Data is separated by comma. Max value: 255 symbols. no
ownerOnly Boolean Determines, whether this file is accessible by other users. no
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params

params:
name=newNonConflictName.jpg&descriotion=newTestDescription&tags=tag1%2Ctag2%2Ctag3
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Delete file (DELETE /files/{id})
Deletes a file, specified by id.

RESOURCE /files/{id}
DESCRIPTION File deletion endpoint.
URL https://api.4sync.com/v1_2/files/{id}
METHOD DELETE
VERSION v1_2
PARAMETERS
RETURNS No content with HTTP Status 204.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params
EXAMPLE RESPONSE NO CONTENT
Move file to Recycle bin (POST /files/{id}/trash)
Used to move a file to the Recycle bin.

RESOURCE /files/{id}/trash
DESCRIPTION Moves a file to Recycle bin.
URL https://api.4sync.com/v1_2/files/{id}/trash
METHOD POST
VERSION v1_2
PARAMETERS
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Move file from Recycle bin (POST /files/{id}/untrash)
Restores a file, moved to a Recycle bin. Default: restores a file to the previous parent folder, i.e. the folder before deletion. If the parent folder no longer exists, a new folder is created. If a file with the same name exists in the parent folder, some new unique name must be specified in the request.

RESOURCE /files/{id}/untrash
DESCRIPTION Restores a file from Recycle bin.
URL https://api.4sync.com/v1_2/files/{id}/untrash
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
name String Some new name of this file in the case of restore conflict. Max value: 255 symbols. no
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params

params:
name=non_conflicting_name.jpg
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Copy file (POST /files/{id}/copy)
Used to create a copy of a file.

RESOURCE /files/{id}/copy
DESCRIPTION Creates copy of a file.
URL https://api.4sync.com/v1_2/files/{id}/copy
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String Identifier of a folder where the file will be copied to. yes
name String New name for a file (optional). no
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params

params:
folderId=validFolderId&name=newNonCoflictingName.jpg
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Move file (POST /files/{id}/move)
Used to create a copy of a file in another folder, and further delete the original.

RESOURCE /files/{id}/move
DESCRIPTION Moves file to another folder.
URL https://api.4sync.com/v1_2/files/{id}/move
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String A folder that represents a new location of the file. yes
name String New file name (optional). no
RETURNS FileResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/{id}?oauth_params

params:
folderId=validFolderId&name=newNonCoflictingName.jpg
EXAMPLE RESPONSE 
    {
      /*File Response*/
    }
Get file's preview (GET /files/{id}/preview)
Returns the preview of audio, video files and document with following extension:
".doc", ".docx", ".pps", ".ppt", ".pptx", ".rtf", ".xls", ".xlsx". It's public call.

RESOURCE /files/{id}/preview
DESCRIPTION For audio/video/document files only. Returns file preview.
URL https://api.4sync.com/v1_2/files/{id}/preview
METHOD GET
VERSION v1_2
PARAMETERS
Parameter Type Description Required
thumbnail String Returns thumbnail of the specified type and id3 tags (only "Title", "Artist", "Album", "Year", "Genre") for an audio file.

See information about possible values {type} in GET /files/{id}/thumbnails/{type}.		 no
RETURNS Preview of an audio/video/document file with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/0l34Ufblba/preview?oauth_params
EXAMPLE RESPONSE Media data
Get original file (GET /files/{id}/download)
Returns the content (original) of a file to be saved. Its also possible to specify only a range of bytes to be downloaded - using a range header.

RESOURCE /files/{id}/download
DESCRIPTION Source file download endpoint.
URL https://api.4sync.com/v1_2/files/{id}/download
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS Source file with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/0l34Ufblba/download?oauth_params
EXAMPLE RESPONSE Data
Returns a thumbnail of the specified type for an audio file with cover, video, image or pdf file. Its a public call. Possible values are {type}:
  • XS: height-72, width-72
  • S: height-240, width-320
  • SM: height-480, width-854
  • M: height-750, width-1334
  • L: height-1080, width-1920
  • XL:height-1600, width-2560
Thumbnails are generated on post-upload for all types except SM, XL types.
The returned image may be larger or smaller than the size requested, depending on the size and aspect ratio of the original image. If the requested preview size exceeds the original file, the latter one will be returned.

Note. Thumbnails are not generated for files larger than 20MB.

RESOURCE /files/{id}/thumbnails/{type}
DESCRIPTION File's thumbnail endpoint.
URL https://api.4sync.com/v1_2/files/{id}/thumbnails/{type}
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS Thumbnail of the specified size of a file with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/files/UFedfe8Pba/thumbnails?oauth_params
EXAMPLE RESPONSE Image
Folder Response
FolderResponse entity contains metadata of a folder, information about its owner and items in it, including files and other folders.

Attributes Type Description
id String Folder unique identifier.
name String Folder name.
description String Folder description.
parentId String Unique identifier of a folder containing the requested folder. Is NULL for a root folder.
path String Path to the requested folder starting at the root.
modified Date Last time a folder was modified.
access String Access type for a folder. Can be public or private.
numChildren Long Number of folders in the requested folder.
numFiles Long Number of files in the requested folder.
ownerId String Unique folder owner identifier.
permissions String User permissions for a folder (e.g. read, write).
passwordProtected Boolean Indicates whether the folder is protected by a password.
folderLink String URL that can be used to view Simple view page of the requested folder.
userPermissions String Indicates whether a specified user is a folder owner or not. Can be owner, write and read.
status String Indicates whether the item is deleted or not. Can be deleted, trashed and normal.
hasMembers Boolean Indicates whether a folder is shared by other 4Sync users.
Example of a folder response
  {
    "id": "sO0jo6Tf",
    "name": "Playlists",
    "description": "",
    "parentId": "t8xpmoZg",
    "path": "/My 4Sync/Playlists",
    "modified": "2016-01-05T15:54:32.781Z",
    "access": "private",
    "numChildren": 0,
    "numFiles": 4,
    "ownerId": "0EPPgsNv",
    "permissions": "write",
    "passwordProtected": false,
    "folderLink": "http://www.4sync.com/folder/sO0jo6Tf/Playlists.html",
    "userPermissions": "owner",
    "status": "normal",
    "hasMembers": true
  }
Get information about a folder (GET /folders/{id})
Returns the full metadata about a folder.

RESOURCE /folder/{id}
DESCRIPTION Folder metainformation endpoint.
URL https://api.4sync.com/v1_2/folder/{id}
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folder/{id}?oauth_params
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Get the list of children of a specified folder (GET /folders/{id}/children)
Returns a list of children (immediate subdirectories) of the specified folder.

RESOURCE /folder/{id}/children
DESCRIPTION Retrieves a list of children (immediate subdirectories) of the specified folder.
URL https://api.4sync.com/v1_2/folder/{id}/children
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folder/{id}/children?oauth_params
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Get the list of files in folder (GET /folders/{id}/files)
Returns the files in the specified folder.

RESOURCE /folder/{id}/files
DESCRIPTION Retrieves a list of files in the specified folder.
URL https://api.4sync.com/v1_2/folder/{id}/files
METHOD GET
VERSION v1_2
PARAMETERS
RETURNS FilesResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folder/{id}/files?oauth_params
EXAMPLE RESPONSE 
    {
      files: [
        {/*File response*/}
      ]
    }
Create folder (POST /folders)
Used to create a new empty folder. The new folder will be created in the specified parent folder. The Content-Type should be set to application/x-www-form-urlencoded.

RESOURCE /folders
DESCRIPTION Create new folder.
URL https://api.4sync.com/v1_2/folders
METHOD POST (Content-Type: application/x-www-form-urlencoded)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
parentId String The folder in which the folder will be created. yes
name String The folder name. Max value: 255 symbols. yes
description String The folder description. Max value: 255 symbols. no
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}?oauth_params

params:
parentId=validFolderId&name=nonConflictingName
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Update folder meta info (PUT /folders/{id})
RESOURCE /folders/{id}
DESCRIPTION Folder meta info update endpoint.
URL https://api.4sync.com/v1_2/folders/{id}
METHOD PUT (application/x-www-form-urlencoded)
VERSION v1_2
PARAMETERS
Parameter Type Description Required
name String New folder name. Max value: 255 symbols. no
description String New description of a folder. Max value: 255 symbols. no
access String Change access settings for a folder. Can be public and private. Available only an owner. no
permissions String Change folder permissions for a user. Can be "read" and "write". Available only an owner. no
password String Set/change a folder password. no
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}?oauth_params

params:
name=newNonConflictName&descriotion=newTestDescription&access=public&permissions=write
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Delete folder (DELETE /folders/{id})
Deletes a folder specified by id.

RESOURCE /folders/{id}
DESCRIPTION Folder deletion endpoint.
URL https://api.4sync.com/v1_2/folders/{id}
METHOD DELETE
VERSION v1_2
PARAMETERS
RETURNS No content with HTTP Status 204.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}?oauth_params
EXAMPLE RESPONSE NO CONTENT
Copy folder (POST /folders/{id}/copy)
Used to create a copy of a folder.

RESOURCE /folders/{id}/copy
DESCRIPTION Creates a copy of a folder.
URL https://api.4sync.com/v1_2/folders/{id}/copy
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String Identifier of a folder where a folder will be copied to. yes
name String New name of a folder (optional). no
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}/copy?oauth_params

params:
folderId=validFolderId&name=newNonCoflictingName
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Move folder (POST /folders/{id}/move)
Used to create a copy of a folder in another folder and then delete the original.

RESOURCE /folders/{id}/move
DESCRIPTION Change parentId for folder.
URL https://api.4sync.com/v1_2/folders/{id}/move
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
folderId String The new folder location of the folder. yes
name String New folder name (optional). no
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}/move?oauth_params

params:
folderId=validFolderId&name=newNonCoflictingName
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Move folder to Recycle bin (POST /folders/{id}/trash)
Used to move a folder to a Recycle bin.

RESOURCE /folders/{id}/trash
DESCRIPTION Moves a folder to Recycle bin.
URL https://api.4sync.com/v1_2/folders/{id}/trash
METHOD POST
VERSION v1_2
PARAMETERS
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}?oauth_params
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }
Move folder from Recycle bin (POST /folders/{id}/untrash)
Restores a folder, moved to Recycle bin. Default: restores a folder to its previous parent folder, i.e. the folder before deletion. If its parent folder no longer exists, a new folder is created. If a folder with the same name exists in the parent folder, some new unique name must be specified in the request.

RESOURCE /folders/{id}/untrash
DESCRIPTION Restores a folder from Recycle bin.
URL https://api.4sync.com/v1_2/folders/{id}/untrash
METHOD POST
VERSION v1_2
PARAMETERS
Parameter Type Description Required
name String Some new name of this folder in the case of restore conflict. Max value: 255 symbols. no
RETURNS FolderResponse entity with HTTP Status 200.
ERROR See Errors section for details.
EXAMPLE REQUEST https://api.4sync.com/v1_2/folders/{id}?oauth_params

params:
name=non_conflicting_name
EXAMPLE RESPONSE 
    {
      /*Folder Response*/
    }


HTTP status code is used to indicate success or failure of an API call. The body of the response contains the details of an error in JSON format.
Sample error response:
  {
    "message": "Invalid value for access parameter. The following values are supported: [private, public].",
    "code": "400.0217",
    "cause": null,
    "fieldName": "access"
  }
Error Attributes
The following attributes are returned as part of an error content.

Attributes Description
message Human readable message about the error.
code The HTTP code of the error response.
cause More detailed information about the reasons of error.
fieldName An optional attribute which is filled if the error was due to a specific parameter.
Common Responses
Code Message
400 Bad request.
400.0212 Request parameter [parameter_name] of type [parameter_type] is missing.
400.0213 Invalid value for [parameter_name] parameter. The length of the [parameter_name] value should be between [value_1] and [value_2].
400.0215 Invalid value for [parameter_name] parameter, [parameter_name] may not be empty.
400.0216 Invalid value for [parameter_name] parameter. The following values are supported: [supported_values].
400.0218 Invalid value for [parameter_name] parameter. The value of the [parameter_name] should be less than or equal to [value].
400.0219 Invalid value for [parameter_name] parameter. The value of the [parameter_name] should be greater than or equal to [value].
400.0220 E-mail address is incorrect.
400.0303 Access denied. The folder is password protected.
400.0500 Incorrect parameter type or malformed body.
401 Unauthorized.
401.0300 Unauthorized.
401.0301 Unauthorized. Your token either expired, rejected or does not exist.
401.0316 Unauthorized. User either does not exist or refuse your application.
401.0317 Unauthorized. Your Premium subscription has expired and your account is currently inaccessible.
401.0318 Invalid nonce. You should generate a Nonce value that is unique for all requests with that timestamp.
401.0319 Timestamp refused. Difference between server and client timestamp must be no more than [value].
401.0600 Internal server error.
403 Forbidden.
403.0100 Insufficient storage space.
403.0101 User's plan file size limit exceeded.
403.0102 Number of files in folder limit exceeded.
403.0103 Number of files in account limit exceeded.
403.0104 Number of nested folders limit exceeded.
403.0105 Number of folders in account limit exceeded.
403.0200 Root folder can't be renamed or deleted.
403.0201 The file or folder with name [name] already exists.
403.0206 File size limit exceeded. To upload files larger than [value] MB, use /upload.
403.0223 The action or subresource request is not allowed. The resource is in trash.
403.0224 The action is not allowed. The resource is not in trash.
403.0225 Incorrect file size.
403.0228 The current character set is not supported yet.
403.0233 Current file type does not support this action.
403.0302 Insufficient permissions to access or modify the resource.
403.0303 Access denied. The folder is password protected.
403.0305 The resource belongs to a user suspended for violation of the service policy.
403.0306 Folder access may only be modified by an owner.
403.0307 Folder permissions may only be modified by an owner.
403.0308 Folder password may only be modified by an owner.
403.0313 User is inactive.
403.0461 Error: The file was either moved or deleted.
404 Not Found.
405 Method Not Allowed.
405.0211 HTTP request method [method_name] is not supported by the resource. The following HTTP request methods are supported: [supported_methods].
406 Not Acceptable.
406.0209 Requested data format is not supported. The following formats are supported: [supported_formats].
415 Unsupported Media Type.
415.0210 Provided media type is not supported. The following media types are supported: [suppoted_media_types].
429 Too Many Requests.
429.0107 Rate limit exceeded. Just [max_number_of_calls] per [time_range] for [limit_type] allowed.
500 Internal server error.
500.0600 Internal server error.
501 Not Implemented.
501.0601 [custom_error_message]
501.0602 Transfer aborted.
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