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Signal Messaging (via signal-cli) MCP Server

Send Signal messages and read replies through your own signal-cli JSON-RPC daemon (unofficial).

Signal Messaging (via signal-cli) scores 37 (Limited), licensed MIT and written in Python. It installs as a local process. It does not declare tools yet. Filed under Developer tools. GitHub shows 0 stars. Install configs are generated for 10 clients. Being listed in the registry is not the same as being vendor-official.

by joshuawowkMITPython0 stars
InstallView on GitHub
Trust score
37Limited
Trust score 37 of 100, Limited

Limited trust

37 of 100 from six public signals. Nobody can buy a point.

  • OSI-style license: mit.
How we score trust
Scorecard

License, quality and maintenance

How grades work
Trust breakdown

Where the 37 comes from

0 + 20 + 0 + 10 + 4 + 3 = 37. Each factor is capped, so no single signal can carry a listing.

Registry0 / 30

Active in the official MCP registry, plus a known vendor namespace.

Registry: 0 of 30 points.
Maintenance20 / 20

How recently the repository saw a commit or release.

Maintenance: 20 of 20 points.
Popularity0 / 20

GitHub stars and weekly downloads, on a log scale.

Popularity: 0 of 20 points.
License10 / 10

A clear, OSI-style open-source license.

License: 10 of 10 points.
Security4 / 10

Not archived, a secure install path, a pinned version.

Security: 4 of 10 points.
Docs3 / 10

A real summary, a README with depth, listed tools.

Docs: 3 of 10 points.

Install

Pick your client, copy the config, paste it in.

Add to Cursor: Signal Messaging (via signal-cli)Install in VS Code: Signal Messaging (via signal-cli)Install in VS Code Insiders: Signal Messaging (via signal-cli)

Needs Cursor or VS Code installed on this device. The button opens the app and asks you to confirm before it adds the server.

~/Library/Application Support/Claude/claude_desktop_config.json
{  "mcpServers": {    "joshuawowk-signal-mcp": {      "command": "docker",      "args": [        "run",        "-i",        "--rm",        "ghcr.io/joshuawowk/signal-mcp:1.0.1"      ],      "env": {        "SIGNAL_SENDER": "",        "SIGNAL_DEFAULT_RECIPIENT": "",        "SIGNAL_RPC_URL": "http://host.docker.internal:8080/api/v1/rpc",        "SIGNAL_TCP_HOST": "127.0.0.1",        "SIGNAL_TCP_PORT": "7583",        "SIGNAL_INBOX_PATH": "/data/inbox.jsonl",        "SIGNAL_POLL_INTERVAL": "3",        "SIGNAL_INBOX_RETENTION_DAYS": "14"      }    }  }}
Install guide

Environment variables

NameRequiredNotes
SIGNAL_SENDERRequiredE.164 number of the account registered in signal-cli (e.g. +15555550100)
SIGNAL_DEFAULT_RECIPIENTRequiredE.164 number messaged by default; tools accept a per-call recipient override
SIGNAL_RPC_URLOptionalsignal-cli HTTP JSON-RPC endpoint as seen from the container. The server's built-in default is http://127.0.0.1:8080/api/v1/rpc (use with --network host on Linux); this listing defaults to the Docker host alias.
SIGNAL_TCP_HOSTOptionalsignal-cli daemon TCP host, used only for the receive-path health check
SIGNAL_TCP_PORTOptionalsignal-cli daemon TCP port (daemon started with --tcp), used only for the receive-path health check
SIGNAL_INBOX_PATHOptionalPath of the replies inbox file inside the container (populated only by the subscriber process)
SIGNAL_POLL_INTERVALOptionalSubscriber poll cadence in seconds
SIGNAL_INBOX_RETENTION_DAYSOptionalDays of replies kept in the inbox file

Tools

All capabilities

Tools show up when the registry metadata or the repository README lists them. Public READMEs are read directly. A GitHub token is used only when one is already configured.

About

Send Signal messages and read replies through your own signal-cli JSON-RPC daemon (unofficial).

Frequently asked questions

What is Signal Messaging (via signal-cli) MCP Server?

Send Signal messages and read replies through your own signal-cli JSON-RPC daemon (unofficial).

How do I install Signal Messaging (via signal-cli) MCP Server in Claude Desktop, Cursor, or VS Code?

Pick your client in the Install section on this page and copy the generated config into the client's config file. Step-by-step guides: Claude Desktop, Cursor, and VS Code. Signal Messaging (via signal-cli) MCP Server runs locally from the Docker image ghcr.io/joshuawowk/signal-mcp:1.0.1 with the command docker run -i --rm ghcr.io/joshuawowk/signal-mcp:1.0.1.

Is Signal Messaging (via signal-cli) MCP Server free and open source?

Yes. Signal Messaging (via signal-cli) MCP Server is released under the MIT license, an OSI-approved open-source license, so you can use, modify, and self-host it under those terms.

Does Signal Messaging (via signal-cli) MCP Server support remote (HTTP) connections?

No remote endpoint is listed for Signal Messaging (via signal-cli) MCP Server. It runs locally on your machine over stdio, started by your MCP client.

How is Signal Messaging (via signal-cli) MCP Server's trust score calculated?

Signal Messaging (via signal-cli) MCP Server scores 37 out of 100 (Limited). The score adds six capped public signals: registry status, maintenance, popularity, license, documentation, and security. Nobody can pay for points. Read the methodology for the full formula.

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