Synology Chat

Synology Chat connects to OpenClaw through a webhook pair: a Synology Chat outgoing webhook posts inbound direct messages to the Gateway, and replies go back through a Synology Chat incoming webhook.

Status: official plugin, installed separately. Direct messages only; text and URL-based file sends are supported.

Install

openclaw plugins install @openclaw/synology-chat

Local checkout (when running from a git repo):

openclaw plugins install ./path/to/local/synology-chat-plugin

Details: Plugins

Quick setup

1. Install the plugin (above).
2. In Synology Chat integrations:
   • Create an incoming webhook and copy its URL.
   • Create an outgoing webhook with your secret token.
3. Point the outgoing webhook URL to your OpenClaw Gateway:
   • https://gateway-host/webhook/synology by default.
   • Or your custom channels.synology-chat.webhookPath.
4. Finish setup in OpenClaw. Synology Chat appears in the same channel setup list in both flows:
   • Guided: openclaw onboard or openclaw channels add
   • Direct: openclaw channels add --channel synology-chat --token <token> --url <incoming-webhook-url>
5. Restart the Gateway and send a DM to the Synology Chat bot.

Webhook auth details:

• OpenClaw accepts the outgoing webhook token from body.token, then ?token=..., then headers.
• Accepted header forms:
  • x-synology-token
  • x-webhook-token
  • x-openclaw-token
  • Authorization: Bearer <token>
• Empty or missing tokens fail closed.
• Payloads may be application/x-www-form-urlencoded or application/json; token, user_id, and text are required.

Minimal config:

{
  channels: {
    "synology-chat": {
      enabled: true,
      token: "synology-outgoing-token",
      incomingUrl: "https://nas.example.com/webapi/entry.cgi?api=SYNO.Chat.External&method=incoming&version=2&token=...",
      webhookPath: "/webhook/synology",
      dmPolicy: "allowlist",
      allowedUserIds: ["123456"],
      rateLimitPerMinute: 30,
      allowInsecureSsl: false,
    },
  },
}

Environment variables

For the default account, you can use env vars:

• SYNOLOGY_CHAT_TOKEN
• SYNOLOGY_CHAT_INCOMING_URL
• SYNOLOGY_NAS_HOST
• SYNOLOGY_ALLOWED_USER_IDS (comma-separated)
• SYNOLOGY_RATE_LIMIT
• OPENCLAW_BOT_NAME

Config values override env vars.

SYNOLOGY_CHAT_INCOMING_URL and SYNOLOGY_NAS_HOST cannot be set from a workspace .env; see Workspace .env files.

DM policy and access control

• Supported dmPolicy values: allowlist (default), open, and disabled. Synology Chat has no pairing flow; approve senders by adding their numeric Synology user IDs to allowedUserIds.
• allowedUserIds accepts a list (or comma-separated string) of Synology user IDs.
• In allowlist mode, an empty allowedUserIds list is treated as misconfiguration and the webhook route will not start.
• dmPolicy: "open" allows public DMs only when allowedUserIds includes "*"; with restrictive entries, only matching users can chat. open with an empty allowedUserIds list also refuses to start the route.
• dmPolicy: "disabled" blocks DMs.
• Reply recipient binding stays on stable numeric user_id by default. channels.synology-chat.dangerouslyAllowNameMatching: true is break-glass compatibility mode that re-enables mutable username/nickname lookup for reply delivery.

Outbound delivery

Use numeric Synology Chat user IDs as targets. The synology-chat:, synology_chat:, and synology: prefixes are accepted.

Examples:

openclaw message send --channel synology-chat --target 123456 --message "Hello from OpenClaw"
openclaw message send --channel synology-chat --target synology-chat:123456 --message "Hello again"
openclaw message send --channel synology-chat --target synology:123456 --message "Short prefix"

Outbound text is chunked at 2000 characters. Media sends are supported by URL-based file delivery: the NAS downloads and attaches the file (max 32 MB). Outbound file URLs must use http or https, and private or otherwise blocked network targets are rejected before OpenClaw forwards the URL to the NAS webhook.

Multi-account

Multiple Synology Chat accounts are supported under channels.synology-chat.accounts. Each account can override token, incoming URL, webhook path, DM policy, and limits. Direct-message sessions are isolated per account and user, so the same numeric user_id on two different Synology accounts does not share transcript state. Give each enabled account a distinct webhookPath. OpenClaw rejects duplicate exact paths and refuses to start named accounts that only inherit a shared webhook path in multi-account setups. If you intentionally need legacy inheritance for a named account, set dangerouslyAllowInheritedWebhookPath: true on that account or at channels.synology-chat, but duplicate exact paths are still rejected fail-closed. Prefer explicit per-account paths.

{
  channels: {
    "synology-chat": {
      enabled: true,
      accounts: {
        default: {
          token: "token-a",
          incomingUrl: "https://nas-a.example.com/...token=...",
        },
        alerts: {
          token: "token-b",
          incomingUrl: "https://nas-b.example.com/...token=...",
          webhookPath: "/webhook/synology-alerts",
          dmPolicy: "allowlist",
          allowedUserIds: ["987654"],
        },
      },
    },
  },
}

Security notes

• Keep token secret and rotate it if leaked.
• Keep allowInsecureSsl: false unless you explicitly trust a self-signed local NAS cert.
• Inbound webhook requests are token-verified and rate-limited per sender (rateLimitPerMinute, default 30).
• Invalid token checks use constant-time secret comparison and fail closed; repeated invalid-token attempts temporarily lock out the source IP.
• Inbound message text is sanitized against known prompt-injection patterns and truncated at 4000 characters.
• Prefer dmPolicy: "allowlist" for production.
• Keep dangerouslyAllowNameMatching off unless you explicitly need legacy username-based reply delivery.
• Keep dangerouslyAllowInheritedWebhookPath off unless you explicitly accept shared-path routing risk in a multi-account setup.

Troubleshooting

• Missing required fields (token, user_id, text):
  • the outgoing webhook payload is missing one of the required fields
  • if Synology sends the token in headers, make sure the gateway/proxy preserves those headers
• Invalid token:
  • the outgoing webhook secret does not match channels.synology-chat.token
  • the request is hitting the wrong account/webhook path
  • a reverse proxy stripped the token header before the request reached OpenClaw
• Rate limit exceeded:
  • too many invalid token attempts from the same source can temporarily lock that source out
  • authenticated senders also have a separate per-user message rate limit
• Allowlist is empty. Configure allowedUserIds or use dmPolicy=open with allowedUserIds=["*"].:
  • dmPolicy="allowlist" is enabled but no users are configured
• User not authorized:
  • the sender's numeric user_id is not in allowedUserIds

Related

• Channels Overview — all supported channels
• Groups — group chat behavior and mention gating
• Channel Routing — session routing for messages
• Security — access model and hardening