Signal Messaging (via signal-cli) MCP server

by joshuawowk·io.github.joshuawowk/signal-mcp·v1.0.1

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

A88/100grade A

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Safety scan

A88/100

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Nobody has reviewed Signal Messaging (via signal-cli) yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

No tool declarations could be read from the package source. They show once the server is installed.

scanner v0.1.10 · 2026-10-26 · same rubric, same numbers if you re-run it

no findings

–Code scanpackage could not be scannedn/a
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitylocal package, no credentials required12/15
Maintenancelast push 6 days ago15/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 88/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

claude mcp add signal-mcp -- docker run -i --rm ghcr.io/joshuawowk/signal-mcp:1.0.1

Is Signal Messaging (via signal-cli) MCP server safe?: Yes, by our scan: it is graded A (88/100). Read the Signal Messaging (via signal-cli) safety report
How do I install Signal Messaging (via signal-cli)?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Signal Messaging (via signal-cli) need an API key?: No secret keys are declared. It reads 8 settings from the environment.
Is Signal Messaging (via signal-cli) maintained?: The last commit was 15 days ago (2026-10-20). The latest release is v1.0.1.

Local package. It runs on your machine, not through the gateway.

SIGNAL_SENDERE.164 number of the account registered in signal-cli (e.g. +15555550100)
SIGNAL_DEFAULT_RECIPIENTE.164 number messaged by default; tools accept a per-call recipient override
SIGNAL_RPC_URLsignal-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_HOSTsignal-cli daemon TCP host, used only for the receive-path health check
SIGNAL_TCP_PORTsignal-cli daemon TCP port (daemon started with --tcp), used only for the receive-path health check
SIGNAL_INBOX_PATHPath of the replies inbox file inside the container (populated only by the subscriber process)
SIGNAL_POLL_INTERVALSubscriber poll cadence in seconds
SIGNAL_INBOX_RETENTION_DAYSDays of replies kept in the inbox file

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Shows the safety grade and links back to this page. It updates itself after every scan and review.

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