Wazap

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[npm] [License: MIT] [M8ven Score]

wazap is an MCP server for your own WhatsApp account. It links as a device, the way WhatsApp Web does, keeps what it sees on your machine, and gives any MCP client — Claude, ChatGPT, Gemini, Cursor, Codex — 23 tools over your chats, messages, media, contacts and groups.

You stop opening WhatsApp to find things and ask instead:

• "What did I miss on WhatsApp today?" — one answer across every linked account: who is waiting on you, mentions, missed calls, busy groups condensed.
• "Find the invoice Dan sent in spring." — search by meaning and by words at once, then open the file.
• "What did the voice note from mama say?" — voice notes come back as text.
• "Tell Ana I'll be twenty minutes late." — you see the recipient and the exact words first. Nothing leaves until you say yes.

No browser, no business account, no third-party service. There is no wazap cloud: it runs where you run it.

Get started

You need Node.js 22.16+ on the 22 line, or 24+, and a phone with WhatsApp.

npx wazap-mcp setup

setup links your account, finds the MCP clients installed on this machine (Claude Code, Claude Desktop, Cursor, Codex, Gemini CLI), writes their config, installs the five skills where the client reads them, and tells you what to restart. Then ask your assistant: "what did I miss on WhatsApp today?"

Rather let your agent do it? Paste this into it:

Set up WhatsApp for me: run npx wazap-mcp setup --agent and follow what it prints.

npx wazap-mcp on its own, in a terminal, starts nothing: it prints where you stand and the next command. When something is off, npx wazap-mcp status is the first thing to run; it prints a fix next to anything broken.

Per client

[Install in Cursor]

The hand-written entry, for any client that takes the usual JSON:

{  "mcpServers": {    "whatsapp": { "command": "npx", "args": ["-y", "wazap-mcp"] }  }}

Every step setup takes, each file connect writes, and upgrading are in docs/install.md.

Linking your account

Linking is a one-time step. setup does it for you; on its own it is:

npx wazap-mcp login                      # QR code: Settings → Linked devices → Link a devicenpx wazap-mcp login --phone +15550100    # pairing code instead, no camera needed

With --phone, wazap prints an 8-character code. On the phone, go to WhatsApp → Settings → Linked devices → Link a device → Link with phone number instead and type it in. The pairing code works over SSH and on a headless server, where a QR is impractical.

An assistant can link the account itself, too: the link_account tool returns the same code, so a Claude Desktop user never needs a terminal.

Several WhatsApp accounts can live in one wazap (wazap account add <id>, then wazap login --account <id>); see docs/accounts.md.

The 23 tools

What every argument means, and every error code, is in docs/tools.md. The assistant gets all of it by calling learn.

Scheduled messages and reminders. send_message with send_at ("tomorrow at 9" as 2026-10-12T09:00 in Europe/Bucharest) drafts a message for later; the user's yes to that preview, time included, schedules it, and every send check runs again when it goes. One wazap could not send within 15 minutes of its time is reported as missed, never sent late. reminder keeps "remind me if Ana has not answered in 2 days" and posts it to your webhook when due. Both survive restarts; see Scheduling a message and Reminders.

Two features are off by default and can run entirely on your machine: voice transcription with whisper.cpp (docs/voice.md) and semantic recall, so search matches meaning and not only words (docs/recall.md). Turn them on with wazap config transcribe local and wazap config recall local.

Skills

Tools say what is possible; the five Agent Skills in skills/ say how to do the job well.

setup installs them for Claude Code, Codex and Cursor (npx wazap-mcp skills install <harness> does it by hand). Every other client gets the same five as MCP prompts from the server, with nothing to install.

Transports

stdio is the default: the client starts npx -y wazap-mcp and talks to it over stdin/stdout. Nothing listens on the network.

HTTP (Streamable HTTP) is for a server that outlives the client, or one another machine reaches:

npx wazap-mcp serve --http                 # http://127.0.0.1:8766/mcp, health at /healthz

--host/--port (or WAZAP_HOST/WAZAP_PORT) move it. wazap refuses to bind anything but loopback without WAZAP_READ_TOKEN. Clients authenticate with a static bearer token (WAZAP_READ_TOKEN, plus WAZAP_WRITE_TOKEN for the write tools) or with OAuth 2.1, which wazap serves itself. Details in docs/self-host.md.

Remote access

Two commands keep wazap running and reachable from hosted agents:

npx wazap-mcp service install   # a launchd agent (macOS) or systemd user unit (Linux)npx wazap-mcp expose            # a public https URL through Tailscale Funnel or Cloudflare Tunnel

expose prints the URL and a consent password. Give the agent only the URL; it registers itself, and the consent page asks you for the password and whether that agent may only read or also send. See Keep it running.

The service recovers by itself: a dropped link is retried with backoff, a watchdog replaces a socket that went dead across a sleep or stopped answering, and when reconnecting keeps failing wazap exits so launchd or systemd starts it fresh. The linked session is never deleted for any of that; only WhatsApp unlinking the device needs a new link. Set WAZAP_WEBHOOK_EVENTS to include alert to be told when the link has been down for 5 minutes, when it is back, and when it needs linking again (Link alerts); get_status shows the same under link.

Deployment

On a server of your own, the session never leaves it. With Docker (images for amd64 and arm64 at ghcr.io/razvangirgiz/wazap):

mkdir wazap && cd wazapcurl -fsSLO https://raw.githubusercontent.com/razvangirgiz/wazap/main/docker-compose.ymlprintf 'WAZAP_READ_TOKEN=%s\nWAZAP_WRITE_TOKEN=%s\n' $(openssl rand -hex 32) $(openssl rand -hex 32) > .envdocker compose run --rm wazap login --phone +15550100   # once; the session lands in the volumedocker compose up -dcurl -s http://127.0.0.1:8766/healthz

The container publishes port 8766 on loopback only; put TLS in front (deploy/Caddyfile is two lines). A systemd unit is in deploy/wazap.service. Both setups, reverse-proxy trust and the OAuth server are in docs/self-host.md. Calling wazap from your own product, and receiving signed webhooks for incoming messages, is in docs/api-and-webhooks.md.

Configuration

Every setting is optional. They are environment variables, read from the process or from ~/.wazap/.env (a real environment variable wins, a flag wins over both). You rarely edit them by hand: wazap config shows the effective settings and changes one.

The full list, including the webhook filters, kept-media limits, retention and proxy trust, is in docs/settings.md; .env.example is the same list as a commented file.

Security and privacy

• Nothing is sent without a yes. send_message only drafts: it returns the recipient and the exact text and touches no network. Only confirm_send sends, and a draft goes out at most once, even across a crash. Draft-then- confirm is a workflow, not proof of consent: an agent can call both tools unless your client makes you approve the second one.
• Read-only is a real switch. With WAZAP_READ_ONLY=1, --read-only or wazap config writes off, the write tools are not registered, so the assistant cannot message anyone even by mistake. The Claude Desktop bundle ships with read-only ticked.
• Recipients can be pinned. wazap config send allow +15550100,… limits an account to a list, deny refuses the ones named; both are checked at draft and again at send (docs/send-rules.md).
• Writes are rate limited, 20 a minute per account by default, because sending faster than a human is how numbers get banned.
• Your data stays on your machine. Credentials, messages, media and notes live in ~/.wazap (0700, credential files 0600). No account, no telemetry. What leaves the machine: WhatsApp traffic; the npm registry, for the version check; Hugging Face, when you download a transcription or embedding model; a transcription API, only if you chose openai; your own webhook, if you set one (docs/data.md).
• Some people can be kept out. Tag a contact #private and their words stay out of everything the assistant did not ask about them by name, and out of the webhook. #no-catchup keeps their chat out of catch_up.
• What it does not do. No bulk send, no scheduler, no campaigns. It never marks anything read on its own, and sends text without link previews, so nothing fetches the pages you link.

Threat model, findings and the limits of each of these: docs/security-audit.md.

Known limitations

• The protocol is unofficial. wazap is built on Baileys, a reverse-engineered implementation of WhatsApp's multi-device protocol. It is not the WhatsApp Business API and Meta does not support it. A protocol change can break wazap until Baileys catches up, and an account that sends in bulk or to people who did not ask can be restricted or banned. The safeguards above reduce that risk; they do not remove it, and the risk is yours.
• Model behaviour is measured on Claude only. The evaluation in eval/ (58 cases, each run three times) has been run on Claude. Other clients get the same tools and the same server-side guards, but nobody has measured how their models use them. The manual protocol for ChatGPT is eval/chatgpt-protocol.md.
• History is what the phone syncs to a linked device, not your whole archive. read_messages with before asks the phone for more, within what WhatsApp still keeps.
• Old media expires. WhatsApp drops old attachments from its servers; get_media then returns MEDIA_UNAVAILABLE, unless wazap kept a copy when it arrived. By default it keeps the photos, voice notes, audio and documents of unmuted chats, up to 16 MB each, 1 GB in all and 90 days, while wazap serve runs; media that arrived and expired while nothing was keeping it cannot be brought back.
• Names come from the phone's address book, which WhatsApp only sends to a fresh connection. If contacts read as numbers (contacts_named: 0 in get_status), wazap contacts resync asks again while no server runs.
• @lid ids. Newer accounts are addressed by a privacy id; wazap maps it back to a number when it has learned the mapping.
• Calls are WhatsApp calls only, and a call that starts and ends while wazap is stopped may be missing. Cellular calls are never visible.
• The phone must stay reachable. A linked device stops receiving once the phone has been offline too long; get_status says so.

What the 1.x line promises not to break is in docs/stability.md.

Documentation

Contributing

git clone https://github.com/razvangirgiz/wazap && cd wazapnpm cinpm run check                  # lint, typecheck, then build and testnode test/smoke-stdio.mjs      # drives the built binary over MCP stdionpm run dev -- status          # run from source with tsx

The tests need no WhatsApp account. CLAUDE.md is the contributor's map: layout, the rules that must never break, and the release procedure. Issues and pull requests are welcome at github.com/razvangirgiz/wazap.

License

MIT © Răzvan Girgiz