Skill: Synology Download Station API

Purpose

Use this skill when you need to integrate with Synology DSM Download Station through its Web API.

Request format

All requests use /webapi/<CGI_PATH> with these core query parameters:

• api=<API_NAME>
• version=<VERSION>
• method=<METHOD>
• additional method-specific params
• session via _sid=<SID> or cookie

General form:

GET /webapi/<CGI_PATH>?api=<API_NAME>&version=<VERSION>&method=<METHOD>[&<PARAMS>][&_sid=<SID>]

Response format

All responses are JSON objects with:

• success: true or false
• data: method result on success
• error: integer error code on failure

Common error codes

Code	Meaning
100	Unknown error
101	Invalid parameter
102	Requested API does not exist
103	Requested method does not exist
104	Requested version does not support the functionality
105	Logged-in session does not have permission
106	Session timeout
107	Session interrupted by duplicate login

API discovery

Start with SYNO.API.Info.

• fixed path: /webapi/query.cgi
• query available APIs:

/webapi/query.cgi?api=SYNO.API.Info&version=1&method=query&query=ALL

Electorrent specifically needs:

• SYNO.API.Auth
• SYNO.DownloadStation.Task

Authentication

SYNO.API.Auth

• path is discovered from SYNO.API.Info (commonly auth.cgi)
• login:

/webapi/auth.cgi?api=SYNO.API.Auth&version=2&method=login&account=<user>&passwd=<pass>&session=DownloadStation&format=cookie

Important params:

• account
• passwd
• session=DownloadStation
• format=cookie or format=sid
• optional otp_code

Logout:

/webapi/auth.cgi?api=SYNO.API.Auth&version=1&method=logout&session=DownloadStation

Auth-specific error codes:

Code	Meaning
400	No such account or incorrect password
401	Account disabled
402	Permission denied
403	2-step verification code required
404	Failed to authenticate 2-step verification code

Download Station API families

API	Purpose
SYNO.DownloadStation.Info	Package info and settings
SYNO.DownloadStation.Schedule	Schedule settings
SYNO.DownloadStation.Task	List tasks and perform task actions
SYNO.DownloadStation.Statistic	Total download/upload stats
SYNO.DownloadStation.RSS.Site	RSS site list/refresh
SYNO.DownloadStation.RSS.Feed	RSS feed list
SYNO.DownloadStation.BTSearch	BT search operations

SYNO.DownloadStation.Task

list

Request params:

• offset optional, default 0
• limit optional, default -1
• additional optional comma-separated expansions:
  • detail
  • transfer
  • file
  • tracker
  • peer

Example:

/webapi/DownloadStation/task.cgi?api=SYNO.DownloadStation.Task&version=1&method=list&additional=detail,file

Returns:

• total
• offset
• tasks[]

Task objects include fields such as:

• id
• type
• username
• title
• size
• status
• status_extra
• optional additional.detail, additional.transfer, additional.file, additional.tracker, additional.peer

getinfo

Params:

• id=dbid_001,dbid_002
• optional additional=detail,transfer,file,tracker,peer

Returns tasks[].

create

Used to add downloads.

Params:

• uri optional: HTTP / FTP / magnet / ED2K links, or shared-folder file paths
• file optional: uploaded torrent/NZB payload
• username optional
• password optional
• unzip_password optional
• destination optional shared-folder-relative destination

This is typically a POST for uploads.

delete

Params:

• id
• force_complete

Returns per-task result objects containing:

• id
• error (0 means success)

pause

Params:

• id

Returns per-task result objects with id and error.

resume

Params:

• id

Returns per-task result objects with id and error.

edit

Commonly used to change destination.

Params:

• id
• destination

Returns per-task result objects with id and error.

Task error codes

Useful task-specific codes:

Code	Meaning
400	File upload failed
401	Max number of tasks reached
402	Destination denied
403	Destination does not exist
404	Invalid task id
405	Invalid task action
406	No default destination
407	Set destination failed
408	File does not exist

Electorrent usage

Electorrent uses:

1. SYNO.API.Info query for API discovery
2. SYNO.API.Auth login
3. SYNO.DownloadStation.Task.list
4. SYNO.DownloadStation.Task.create for URL and file uploads
5. SYNO.DownloadStation.Task.pause
6. SYNO.DownloadStation.Task.resume
7. SYNO.DownloadStation.Task.delete

Reference

• https://global.download.synology.com/download/Document/Software/DeveloperGuide/Package/DownloadStation/All/enu/Synology_Download_Station_Web_API.pdf