- Creds on disk: `ls -l ~/.openclaw/credentials/whatsapp/<accountId>/creds.json` (mtime should be recent).
- Session store: `ls -l ~/.openclaw/agents/<agentId>/sessions/sessions.json` (path can be overridden in config). Count and recent recipients are surfaced via `status`.
- Relink flow: `openclaw channels logout && openclaw channels login --verbose` when status codes 409–515 or `loggedOut` appear in logs. (Note: the QR login flow auto-restarts once for status 515 after pairing.)
- No inbound messages → confirm linked phone is online and the sender is allowed (`channels.whatsapp.allowFrom`); for group chats, ensure allowlist + mention rules match (`channels.whatsapp.groups`, `agents.list[].groupChat.mentionPatterns`).
`openclaw health --json` asks the running Gateway for its health snapshot (no direct channel sockets from the CLI). It reports linked creds/auth age when available, per-channel probe summaries, session-store summary, and a probe duration. It exits non-zero if the Gateway is unreachable or the probe fails/timeouts. Use `--timeout <ms>` to override the 10s default.