📡 warelay — WhatsApp Relay CLI

Small CLI to send, receive, auto-reply, and inspect WhatsApp messages over Twilio or your personal WhatsApp Web session. Ships with a one-command webhook setup (Tailscale Funnel + Twilio callback) and a configurable auto-reply engine (plain text or command/Claude driven).

Quick Start (5 steps)

1. Prereqs: Node 22+, pnpm, a Twilio account with a WhatsApp-enabled number; Tailscale optional for webhooks.
2. Install deps: pnpm install
3. Copy .env.example → .env; set TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN or TWILIO_API_KEY/TWILIO_API_SECRET, and TWILIO_WHATSAPP_FROM=whatsapp:+15551234567 (plus optional TWILIO_SENDER_SID).
4. Send a test: pnpm warelay send --to +12345550000 --message "Hi from warelay"
5. Choose how to receive replies:
   • Polling (no ingress): pnpm warelay relay --provider twilio --interval 5 --lookback 10
   • Webhook (automatic): pnpm warelay up --port 42873 --path /webhook/whatsapp --verbose
   • Personal WhatsApp (no Twilio): pnpm warelay web:login then pnpm warelay send --provider web ...

Main Features

• Two providers: Twilio (default) for reliable delivery + status; Web provider for quick personal sends/receives via QR login.
• Auto-replies: Static templates or external commands (Claude-aware), with per-sender or global sessions and /new resets.
• Webhook in one go: warelay up enables Tailscale Funnel, runs the webhook server, and updates the Twilio sender callback URL.
• Polling fallback: relay polls Twilio when webhooks aren’t available; works headless.
• Status + delivery tracking: status shows recent inbound/outbound; send can wait for final Twilio status.

Command Cheat Sheet

Command	What it does	Core flags
warelay send	Send a WhatsApp message (Twilio or Web)	--to <e164> --message <text> --wait <sec> --poll <sec> `--provider twilio
warelay relay	Auto-reply loop (poll Twilio or listen on Web)	`--provider auto
warelay status	Show recent sent/received messages	--limit <n> --lookback <min> --json
warelay webhook	Run local inbound webhook server	--port <port> --path <path> --reply <text> --verbose --yes --dry-run
warelay up	Turn on webhook + Tailscale Funnel + Twilio callback	--port <port> --path <path> --verbose --yes --dry-run
warelay web:login (login)	Link personal WhatsApp Web via QR	--verbose

Providers

• Twilio (default): needs .env creds + WhatsApp-enabled number; supports delivery tracking, polling, webhooks, and auto-reply typing indicators.
• Web (--provider web): uses your personal WhatsApp via Baileys; supports send/receive + auto-reply, but no delivery-status wait; cache lives in ~/.warelay/credentials/ (rerun web:login if logged out).
• Auto-select (relay only): --provider auto uses Web when logged in, otherwise Twilio polling.

Configuration

Environment (.env)

Variable	Required	Description
TWILIO_ACCOUNT_SID	Yes (Twilio provider)	Twilio Account SID
TWILIO_AUTH_TOKEN	Yes*	Auth token (or use API key/secret)
TWILIO_API_KEY	Yes*	API key if not using auth token
TWILIO_API_SECRET	Yes*	API secret paired with TWILIO_API_KEY
TWILIO_WHATSAPP_FROM	Yes (Twilio provider)	WhatsApp-enabled sender, e.g. whatsapp:+15551234567
TWILIO_SENDER_SID	Optional	Overrides auto-discovery of the sender SID

(*Provide either auth token OR api key/secret.)

Auto-reply config (~/.warelay/warelay.json, JSON5)

• Controls who is allowed to trigger replies (allowFrom), reply mode (text or command), templates, and session behavior.
• Example (Claude command):

{
  inbound: {
    allowFrom: ["+12345550000"],
    reply: {
      mode: "command",
      bodyPrefix: "You are a concise WhatsApp assistant.\n\n",
      command: ["claude", "--dangerously-skip-permissions", "{{BodyStripped}}"],
      claudeOutputFormat: "text",
      session: { scope: "per-sender", resetTriggers: ["/new"], idleMinutes: 60 }
    }
  }
}

Claude CLI setup (how we run it)

1. Install the official Claude CLI (e.g., brew install anthropic-ai/cli/claude or follow the Anthropic docs) and run claude login so it can read your API key.
2. In warelay.json, set reply.mode to "command" and point command[0] to "claude"; set claudeOutputFormat to "text" (or "json"/"stream-json" if you want warelay to parse and trim the JSON output).
3. (Optional) Add bodyPrefix to inject a system prompt and session settings to keep multi-turn context (/new resets by default).
4. Run pnpm warelay relay --provider auto (or --provider web|twilio) and send a WhatsApp message; warelay will queue the Claude call, stream typing indicators (Twilio provider), parse the result, and send back the text.

Auto-reply parameter table

Key	Type	Default	Notes
inbound.allowFrom	string[]	empty	E.164 numbers allowed to trigger auto-reply (no whatsapp:).
inbound.reply.mode	"text" | "command"	—	Reply style.
inbound.reply.text	string	—	Used when mode=text; templating supported.
inbound.reply.command	string[]	—	argv for mode=command; each element templated. Stdout (trimmed) is sent.
inbound.reply.template	string	—	Injected as argv[1] (prompt prefix) before the body.
inbound.reply.bodyPrefix	string	—	Prepended to Body before templating (great for system prompts).
inbound.reply.timeoutSeconds	number	600	Command timeout.
inbound.reply.claudeOutputFormat	`"text"	"json"	"stream-json"`
inbound.reply.session.scope	`"per-sender"	"global"`	per-sender
inbound.reply.session.resetTriggers	string[]	["/new"]	Exact match or prefix (/new hi) resets session.
inbound.reply.session.idleMinutes	number	60	Session expires after idle period.
inbound.reply.session.store	string	~/.warelay/sessions.json	Custom session store path.
inbound.reply.session.sessionArgNew	string[]	["--session-id","{{SessionId}}"]	Args injected for a new session run.
inbound.reply.session.sessionArgResume	string[]	["--resume","{{SessionId}}"]	Args for resumed sessions.
inbound.reply.session.sessionArgBeforeBody	boolean	true	Place session args before final body arg.

Templating tokens: {{Body}}, {{BodyStripped}}, {{From}}, {{To}}, {{MessageSid}}, plus {{SessionId}} and {{IsNewSession}} when sessions are enabled.

Webhook & Tailscale Flow

• warelay webhook starts the local Express server on your chosen port/path; add --reply "Got it" for a static reply when no config file is present.
• warelay up adds Funnel: checks tailscale, enables tailscale funnel <port>, prints the public URL (https://<tailnet-host><path>), starts the webhook, discovers the WhatsApp sender SID, and updates Twilio callbacks to the Funnel URL.
• If Funnel is not allowed on your tailnet, the CLI exits with guidance; you can still use relay --provider twilio to poll without webhooks.

Troubleshooting Tips

• Send/receive issues: run pnpm warelay status --limit 20 --lookback 240 --json to inspect recent traffic.
• Auto-reply not firing: ensure sender is in allowFrom (or unset), and confirm .env + warelay.json are loaded (reload shell after edits).
• Web provider dropped: rerun pnpm warelay web:login; credentials live in ~/.warelay/credentials/.
• Tailscale Funnel errors: update tailscale/tailscaled; check admin console that Funnel is enabled for this device.

FAQ & Safety (quick answers)

• Twilio errors: 63016 “permission to send an SMS has not been enabled” → ensure your number is WhatsApp-enabled; 63007 template not approved → send a free-form session message within 24h or use an approved template; 63112 policy violation → adjust content, shorten to <1600 chars, avoid links that trigger spam filters. Re-run pnpm warelay status to see the exact Twilio response body.
• Does this store my messages? Warelay only writes ~/.warelay/warelay.json (config), ~/.warelay/credentials/ (WhatsApp Web auth), and ~/.warelay/sessions.json (session IDs + timestamps). It does not persist message bodies beyond the session store. Logs print to stdout/stderr; redirect or rotate if needed.
• Personal WhatsApp safety: Automation on personal accounts can be rate-limited or logged out by WhatsApp. Use --provider web sparingly, keep messages human-like, and re-run web:login if the session is dropped.
• Limits to remember: WhatsApp text limit ~1600 chars; avoid rapid bursts—space sends by a few seconds; keep webhook replies under a couple seconds for good UX; command auto-replies time out after 600s by default.
• Deploy / keep running: Use tmux or screen for ad-hoc (tmux new -s warelay -- pnpm warelay relay --provider twilio). For long-running hosts, wrap pnpm warelay relay ... or pnpm warelay up ... in a systemd service or macOS LaunchAgent; ensure environment variables are loaded in that context.
• Rotating credentials: Update .env (Twilio keys), rerun your process; for Web provider, delete ~/.warelay/credentials/ and rerun pnpm warelay web:login to relink.