openclaw/docs/channels/discord-activities.md

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Launch self-contained OpenClaw HTML widgets inside Discord Activities	Setting up or troubleshooting Discord Activity widgets	Discord Activities

Discord Activities let an agent post an interactive, self-contained HTML widget to the current Discord channel. The message includes an Open widget button; clicking it launches the widget inside Discord.

The feature is off by default. show_widget remains one core-owned tool. When channels.discord.activities is present and a client secret resolves, the Discord Activity routes, launch-button handler, and current-channel presenter become available behind that tool. Without the block, requests to the public Activity prefix remain indistinguishable from an unregistered route. No Discord-specific widget tool or alias exists.

Prerequisites

• an existing OpenClaw Discord bot
• a public HTTPS hostname that reaches the OpenClaw gateway
• permission to configure Activities and OAuth2 for the bot's Discord application

Any HTTPS reverse proxy or tunnel works. A named Cloudflare Tunnel provides a stable hostname without exposing the gateway port directly.

# ~/.cloudflared/config.yml
tunnel: openclaw-discord
credentials-file: /home/you/.cloudflared/TUNNEL-ID.json
ingress:
  - hostname: openclaw.example.com
    service: http://127.0.0.1:18789
  - service: http_status:404

cloudflared tunnel login
cloudflared tunnel create openclaw-discord
cloudflared tunnel route dns openclaw-discord openclaw.example.com
cloudflared tunnel run openclaw-discord

Keep normal gateway authentication enabled. Only the Activity prefix is public, and the plugin validates OAuth, Activity instance membership, channel binding, sessions, and one-time document capabilities itself.

Setup

Start your tunnel or reverse proxy and verify that `https://openclaw.example.com/discord/activity/` reaches the gateway after Activities configuration is added. Replace the example hostname with your own. Open the existing bot application in the [Discord Developer Portal](https://discord.com/developers/applications). Open **Activities**, enable Activities, and create a URL mapping:

- prefix: `ROOT` (`/`)
- target: `openclaw.example.com/discord/activity`

The target is the public hostname plus `/discord/activity`, without a trailing slash.

Open **OAuth2** in the Developer Portal. Discord requires at least one redirect URI, so add a local placeholder such as the loopback address if the application has none yet; the Embedded App SDK handles the Activity return flow. Copy or reset the application client secret. Treat it as a credential: do not paste it into chat, logs, or a committed configuration file. Add one block to the Discord account that should offer widgets:

```json5
{
  channels: {
    discord: {
      token: "${DISCORD_BOT_TOKEN}",
      activities: {
        clientSecret: "${DISCORD_CLIENT_SECRET}",
        // Optional. Defaults to the bot application ID learned at startup.
        applicationId: "YOUR_DISCORD_APPLICATION_ID",
      },
    },
  },
}
```

You may omit `clientSecret` from the block when `DISCORD_CLIENT_SECRET` is set. The block itself must remain present to opt in.

Normal Discord access settings remain separate. For example, `allowFrom` still controls who can DM the agent; it does not control who can open a widget already posted in a channel.

Restart the gateway. In a Discord conversation, ask the agent to show an interactive widget. The agent calls `show_widget`; click **Open widget** on the posted message.

Core validates and wraps the widget document before handing it to Discord. The presenter accepts HTML source up to 48 KiB, stores the canonical composed document, and always labels the Activity button Open widget. The standard show_widget pin, name, tab, size, frame, ordering, and capability fields remain available because dashboard state stays core-owned. Registered non-HTML widget kinds are not offered when Discord is the only available presentation route.

Security model

• OAuth identifies the Discord user before widget metadata is returned.
• Discord's Get Activity Instance API must confirm that the OAuth user is present in the current Activity instance. The instance channel must match the channel where the widget was posted.
• Everyone who Discord permits into that channel can open its widgets. To narrow the audience, use Discord channel permissions. OpenClaw command and DM allowlists do not grant or remove access to already-posted channel content.
• OAuth sessions expire after 15 minutes. Widget document capabilities expire after 60 seconds and work once.
• Widgets expire after seven days, with at most 64 retained per Discord plugin instance.
• Widget HTML is authored by your agent and should be treated as trusted content. Do not embed secrets you would not want a buggy widget to expose.
• The widget can navigate within its own nested frame. The sandbox="allow-scripts" iframe blocks top-level navigation, popups, and same-origin access, while its Content Security Policy blocks network connections and external resources. These controls are defense-in-depth, not a security boundary against the agent that authored the widget.
• When Activities is disabled or its required account credentials are unavailable, the route remains registered internally but public requests under /discord/activity are left unhandled and return the normal 404.

The public Activity shell and token-exchange route become reachable through your tunnel when enabled. They do not expose widget HTML without a valid OAuth session and one-time document capability.

Troubleshooting

The Activity says “Gateway offline”

• confirm the tunnel is running and routes to the gateway's actual bind port
• confirm the Developer Portal target includes /discord/activity
• restart the gateway after changing Discord or OpenClaw configuration
• confirm the Discord bot token and Activities client secret both resolve in the running gateway; incomplete credentials keep /discord/activity externally hidden behind the normal 404

Discord opens a blank page or reports blocked:csp

• verify the URL mapping uses ROOT and does not add a second /discord/activity segment
• confirm the shell, shell.js, and SDK module all return through the Discord proxy
• inspect gateway logs for requests under /discord/activity/

Widget network requests are intentionally blocked. Inline all CSS, JavaScript, images, and data needed by the widget.

“Widget unavailable”

Launch the button from the channel where the agent posted it. OpenClaw tracks launches server-side when clicked, so a fresh launch record can resolve the exact widget even when Discord omits or mangles the button's custom ID. When neither the custom ID nor a launch record resolves, OpenClaw opens the most recently posted live widget in that channel. Older widgets remain addressable through buttons that preserve their custom ID.

“You cannot launch Activities in this channel”

Discord does not launch Activities from forum-style channels. OpenClaw rejects the Activity component delivery there instead of posting a button that cannot work. Ask for the widget from a regular text channel instead.