NCdiscordhook — Installation Guide

Prerequisites

Nextcloud 28+ with the Talk app enabled
PHP 8.1+
Access to the Nextcloud server (SSH or direct file access)

Step 1: Enable the `talk-bot` user

The app posts messages as a dedicated bot user. You must create this user and generate an app password.

Create the bot user (via `occ`):

cd /path/to/nextcloud
php occ user:add --password-from-env talk-bot
# You'll be prompted to set a password interactively, or:
export OC_PASS="your-bot-password-here"
php occ user:add --password-from-env talk-bot

Generate an app password for the bot:

Log in to Nextcloud as admin
Go to Settings → talk-bot → Devices & sessions
Click Add device and give it a name (e.g., "NCdiscordhook")
Copy the generated device password — you'll need this in Step 3

Step 2: Install the app

Option A: From the web UI (recommended)

ZIP only the ncdiscordhook directory (not the parent folder):

cd /path/to/ncdiscordhook
zip -r ../ncdiscdhook.zip .

Upload via web UI:
- Go to Apps → Apps management (or Administration → Apps)
- Click Upload app (or Download and enable → upload the ZIP)
- Select ncdiscdhook.zip
- The app will install and enable automatically

Option B: From the command line

cd /path/to/nextcloud/apps
git clone https://github.com/Mr-Newlove/nc_bot_webhooks.git
# or copy the directory manually:
# cp -r /path/to/ncdiscordhook /path/to/nextcloud/apps/ncdiscordhook

Enable the app:

cd /path/to/nextcloud
php occ app:enable ncdiscordhook

Step 3: Configure the app

Log in to Nextcloud as admin
Go to Settings → Admin → NCdiscordhook
Bot App Password — Paste the device password you generated in Step 1
Image Retention — Set how many days to keep uploaded images (default: 90)
Room Management — Click Fetch Rooms to list available Talk rooms
Check the rooms you want to accept webhooks for
For each room, click + Generate Auth Token to create a webhook URL
Click Save Configuration

Step 4: Set up the Discord webhook

In your Discord channel, go to Channel Settings → Integrations → Webhooks
Create a new webhook (or edit an existing one)
Set the Webhook URL to:

https://your-nextcloud-server/apps/ncdiscordhook/webhook/<room-token>/<auth-token>

Replace <room-token> and <auth-token> with the values shown in the Nextcloud admin settings for the selected room.

Save the webhook in Discord

Step 5: Verify

Send a test message through the Discord webhook. You should see it appear in the corresponding Nextcloud Talk room with the configured sender name.

Test with curl:

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"content":"Test message from NCdiscordhook","username":"CI Bot"}' \
  https://your-nextcloud-server/apps/ncdiscordhook/webhook/<room-token>/<auth-token>

Troubleshooting

"talk-bot user not found" — The talk-bot user doesn't exist. Re-run Step 1.
"Bot password not configured" — You haven't entered the bot password in the admin settings, or it was cleared. Re-enter it in Step 3.
Messages not appearing — Check the Nextcloud log (data/nextcloud.log or Settings → Admin → Logging) for errors from the ncdiscordhook app.
Image upload fails — Verify the bot user has file storage quota and the NCdiscordhook-images folder can be created.

Security Notes

Each room has its own auth token — treat them like passwords
The webhook endpoint is public (no auth required) but validates the auth token from the URL path
Admin settings endpoints (/save-config, /rooms) require admin login
Images are stored in the bot user's files and purged after the retention period
Known limitations (to be fixed in a future release):
- Auth tokens generated from the settings UI use client-side generation; for higher security, regenerate them via the server API
- The webhook endpoint has no rate limiting — consider placing it behind a reverse proxy rate limiter if exposing to untrusted sources

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