@chamade/mcp-server

MCP (Model Context Protocol) server for Chamade — a voice and chat gateway that lets your AI agent join meetings and DMs on Discord, Microsoft Teams, Google Meet, Telegram, SIP, Zoom, Nextcloud Talk, Slack, and WhatsApp.

The recommended voice path is hosted STT/TTS with bring-your-own-key. Drop your own ElevenLabs / Deepgram / OpenAI / Cartesia API key in your dashboard once — Chamade runs the full speech pipeline on its side using that key. Transcripts flow in as call_transcript events, chamade_call_say speaks into the meeting. Free on Chamade's side; you only pay your provider. Your agent stays fully text-driven.

Already have a voice pipeline you want to keep (OpenAI Realtime, LiveKit Agents, Pipecat, Deepgram Voice Agent, a manual cascade)? Chamade also exposes the call's raw-PCM audio as a bidirectional WebSocket — BYO audio, Chamade transports, you run the speech layer. Either mode, same MCP tools for control.

File attachments work out of the box on DMs and meeting chat for Discord, Telegram, Slack, WhatsApp (incl. voice notes), and Nextcloud Talk. Use chamade_file_upload_url to mint a pre-signed no-auth upload URL, then pass the returned file_id in attachments on chamade_dm_chat or chamade_call_chat. Inbound files arrive on chamade_inbox as Chamade-signed URLs — your agent can curl them with no extra auth. Teams + Meet support is code-ready but gated until the respective platform certifications complete.

Chamade is currently in early access: free, no subscription, no quota.

v3: hosted MCP + thin stdio shim

The Chamade MCP server is now hosted at https://mcp.chamade.io/mcp/ and speaks the Streamable HTTP transport. That's the single source of truth — every tool, every resource, every push event lives there.

If your MCP client supports Streamable HTTP (Claude Desktop recent, Claude Code, Cursor, Windsurf, …), configure it directly against the hosted endpoint. You don't need this npm package.
If your MCP client is stdio-only, install this package. Since v3 it's a ~160-line wrapper that spawns mcp-remote under the hood to bridge stdio to the hosted HTTP endpoint. Same tools, same push events, same latency. Zero drift because there is no parallel stdio implementation.

Earlier versions of this package (v2.x and below) shipped a full native stdio server that implemented the 13 tools locally in TypeScript against Chamade's REST API. v3 replaces that with a shim — please upgrade to avoid maintaining two surfaces that slowly diverge.

Quick start

Option A — HTTP direct (preferred)

If your client speaks Streamable HTTP, skip this package entirely:

{
  "mcpServers": {
    "chamade": {
      "type": "http",
      "url": "https://mcp.chamade.io/mcp/",
      "headers": {
        "Authorization": "Bearer chmd_..."
      }
    }
  }
}

Option B — stdio shim (this package)

For stdio-only clients:

{
  "mcpServers": {
    "chamade": {
      "command": "npx",
      "args": ["-y", "@chamade/mcp-server@3"],
      "env": {
        "CHAMADE_API_KEY": "chmd_..."
      }
    }
  }
}

Get an API key at https://chamade.io/dashboard.

Configuration

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%/Claude/claude_desktop_config.json (Windows). Use Option A or B above.

Claude Code

.mcp.json at the root of your project. Use Option A (HTTP direct) for the best experience.

For real-time push events (transcripts, incoming DMs, ringing calls, WhatsApp dm_delivered flush), launch Claude Code with the channel flag every time:

claude --dangerously-load-development-channels server:chamade --continue

The flag is a per-launch client-side opt-in mandated by Claude Code for MCP channels not yet on the Anthropic allowlist — it's not dangerous, it's just the standard opt-in for experimental channels during the research preview. The server name after server: must match the key in your .mcp.json. Without the flag, tools still work but push events are silently ignored — you have to poll chamade_inbox and chamade_call_status to see new activity.

Cursor / Windsurf / OpenClaw

Same format. Path varies by client: .cursor/mcp.json, ~/.codeium/windsurf/mcp_config.json, ~/.openclaw/config.json. Use Option A if the client supports HTTP, otherwise Option B.

Tools

Tool	Description
`chamade_call_join`	Join a voice meeting (platform + meeting_url).
`chamade_call_say`	Speak text aloud via TTS in the meeting.
`chamade_call_chat`	Send a text chat message in the meeting. Optional `attachments: [{file_id} \| {url} \| {bytes_b64, name, mime}]` to send files along with the text; `text` becomes the caption when both are set. 25 MB cap per attachment.
`chamade_call_status`	Get call state and new transcript lines (delta pattern).
`chamade_call_accept`	Answer a ringing inbound call (SIP, etc.).
`chamade_call_refuse`	Refuse/reject a ringing inbound call.
`chamade_call_typing`	Send a typing indicator in meeting chat.
`chamade_call_leave`	Hang up and leave the meeting.
`chamade_call_list`	List all active calls.
`chamade_inbox`	Check DM conversations (Discord, Telegram, Teams, WhatsApp, Slack, NC Talk). Shows WhatsApp 24h window state inline. Inbound file attachments arrive as `attachments[]` on each message, with Chamade-signed URLs.
`chamade_dm_chat`	Send a DM message by platform. Optional `attachments: [{file_id} \| {url} \| {bytes_b64, name, mime}]` to send files; `text` becomes the caption. On WhatsApp outside the 24h window, returns 202 queued and auto-fires a re-engagement template.
`chamade_dm_typing`	Send a typing indicator in DM by platform.
`chamade_file_upload_url`	Mint a short-lived (5 min) pre-signed upload URL. Your shell / agent `curl -F file=@path <url>` with no auth header (URL itself is the auth), then pass the returned `file_id` in `attachments: [{file_id}]` on a subsequent send. Recommended path for any non-trivial local file — a shell-streamed upload keeps the tool call tiny instead of forcing every base64 character through the model's output budget.
`chamade_account`	Check account status, plan, credit/quota, and per-platform readiness (incl. a `files` bool per platform).

Resources

URI template	Description
`chamade://calls/{call_id}/transcript`	Live transcript. Each read returns only new lines since the last read (delta pattern). Channel-mode clients also receive push notifications for every new line.

Channel mode (push events)

Channel mode pushes DM messages, incoming SIP calls, transcript lines, call state changes, and WhatsApp dm_delivered flush events directly into the agent's context — no polling.

Server side — nothing to configure. The hosted Chamade MCP server always declares the experimental.claude/channel capability during the initialize handshake. The v2.x --channel arg / CHAMADE_CHANNEL=1 env var are gone.

Client side — Claude Code needs a per-launch flag. Claude Code only processes notifications/claude/channel from MCP servers you've explicitly opted in:

claude --dangerously-load-development-channels server:chamade --continue

Required every launch. Without it, Chamade tools still work but push events are silently dropped client-side — the agent has to poll chamade_inbox and chamade_call_status to see new activity.

Other MCP clients (Claude Desktop, Cursor, Windsurf) currently do not have a channel receiver and will silently ignore push notifications. They still work in polling mode via chamade_inbox with last_message_cursor + optional wait for long-polling.

Environment variables (shim only)

Only the stdio shim uses these. Direct HTTP config has everything in JSON.

Variable	Required	Default	Description
`CHAMADE_API_KEY`	Yes	—	API key (`chmd_*`) from chamade.io/dashboard
`CHAMADE_URL`	No	`https://chamade.io`	Chamade instance URL. The shim derives the MCP endpoint automatically: `https://chamade.io` → `https://mcp.chamade.io/mcp/`, `https://dev.chamade.io` → `https://mcp.dev.chamade.io/mcp/`.
`CHAMADE_MCP_URL`	No	—	Explicit MCP endpoint override. Skip unless you're running a custom proxy.

The v2.x --channel CLI flag is silently accepted for backwards-compat, but it's a no-op — channel mode is always on in v3.

Supported platforms

Discord — voice channels (shared bot or bring your own), text, files (send + receive, 25 MB)
Microsoft Teams — voice meetings + text DM, requires OAuth connection on dashboard. Files code-ready, gated behind AppSource cert.
Google Meet — voice (audio_in) + chat text, requires OAuth connection on dashboard (see note below). Files code-ready, gated behind Google OAuth verification.
Telegram — DM text + files (send + receive). No voice.
Zoom — voice + meeting chat, pass meeting URL (pending Zoom Marketplace approval — tester access on request). No files.
SIP / Phone — voice only, pass phone number or SIP URI. No files.
Nextcloud Talk — voice + text + files (send on any addon version, receive needs addon ≥ 2.4.0)
WhatsApp — DM text + files (send + receive, incl. voice notes as raw audio). No voice calls.

⚠️ Google Meet voice — beta limitation. Real-time audio capture on Meet relies on Google's Meet Media API, currently in Developer Preview. Every meeting participant must be individually enrolled — if anyone isn't, audio capture fails. Calendar integration and in-meeting chat work normally for everyone. For production voice use cases, prefer Teams, Discord, Nextcloud Talk, or SIP.

How it works

Agent (Claude Desktop, Cursor, …)
  │ MCP (Streamable HTTP, Authorization: Bearer chmd_*)
  ▼
mcp.chamade.io                       (hosted by Chamade)
  │
  ▼
Chamade API                           (chamade.io)
  │
  ▼
Maquisard bridge                      (transports audio; forwards to your
                                       STT/TTS provider when BYOK preset set)
  │
  ▼
Discord / Teams / Meet / …

With Option B (stdio shim), the client doesn't speak HTTP; the shim sits in between as a transport adapter:

Agent (stdio-only client)
  │ stdio JSON-RPC
  ▼
@chamade/mcp-server@3                 (this package, ~160 LOC)
  │ spawns
  ▼
mcp-remote                            (local subprocess)
  │ Streamable HTTP, Bearer chmd_*
  ▼
mcp.chamade.io                        (hosted)

Development

npm install
npm run dev     # runs with tsx (hot reload, src/index.ts)
npm run build   # compiles to dist/
npm test        # unit tests for deriveMcpUrl + buildRemoteArgs

The shim itself is tiny (see src/index.ts). Full MCP tool behavior is tested in the parent Chamade repo under tests/e2e/test_mcp_http.py, which drives the hosted server directly — that's the source of truth for tool semantics.

Documentation

MCP server docs — setup for every major client
Channel mode docs — how push events work
Full API reference — every tool, every endpoint, LLM-formatted
Setup guide — step-by-step onboarding for agents

Issues & feedback

Bug or feature request: open an issue
Direct contact: contact@nafis.io
In-app: every Chamade dashboard has a "Send feedback" button

License

MIT — see LICENSE.