How do I connect Signal MCP Server to Claude?

Run `claude mcp add signal-mcp -- uvx signal-mcp serve` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.

Is Signal MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can Signal MCP Server do?

Signal MCP Server documents 40 tools to the agent, including add_sticker_pack, admin_delete_message, block_contact. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

Signal MCP

Unclaimed

by googlarz

Ask Claude about your Signal conversations. Persistent history, full-text search, and complete signal-cli coverage — 100% local.

Set up this server

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01 / Choose your client

02 / Before you connect

Authentication is not specified. Check the project instructions before connecting.

Install the runtime required by the project and make it available to your client.

Project instructionsEnvironment variable names (optional)

Use names from the project instructions, separated by commas. Enter names only, never secret values.

03 / Add the configuration

Source: generated from public install instructions

claude mcp add --transport stdio 'signal-mcp' -- 'uvx' 'signal-mcp' 'serve'

Run in your terminal after replacing any placeholders.

04 / Check it in your client

Open your client’s MCP settings and confirm the server connects and lists its tools. A copied configuration does not confirm a working connection.

claudeclaude-codemcpmessagingmodel-context-protocolprivacysignal

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40 of 40 tools

Documented tools (40)

From project documentation. A server handshake does not verify each tool’s description or behavior.

add_sticker_pack

Install a sticker pack from a signal.art URL. Returns the pack ID for use with getsticker/sendsticker.

admin_delete_message

Group admin: delete any message in a group you administer.

block_contact

Block a contact.

create_group

Create a new Signal group.

delete_group_message

Remote-delete a sent group message.

delete_message

Remote-delete (unsend) a sent DM.

edit_message

Edit a previously sent message (DM or group). Updates local store. Incoming edits from contacts also update the stored copy in-place.

get_conversation

Message history with a contact or group. Supports since, limit, and offset for pagination.

get_own_number

Get the Signal number this server is running as.

get_profile

Get profile info for a contact.

get_sticker

Retrieve a single sticker image as base64.

get_unread

Get messages not yet marked as read from local store.

join_group

Join a group via invite link.

leave_group

Leave a group.

list_contacts

All contacts with names and numbers. Supports optional search filter.

list_conversations

All conversations ordered by most recent message.

list_groups

All groups with members and metadata.

list_sticker_packs

List all installed sticker packs with packid and sticker IDs for sendsticker.

mark_as_unread

Mark one or more stored messages as unread.

pin_message

Pin a message in a DM or group conversation.

react_to_message

React to a message with an emoji (DM or group). Set remove=true to unreact.

receive_messages

Poll for new incoming messages and delivery receipts.

remove_contact

Remove a contact from the local list.

search_messages

Full-text search (FTS5) across all stored messages. Supports sender, limit, and offset.

send_attachment

Send a file or image to a contact. Supports captions and view-once.

send_group_attachment

Send a file or image to a group. Supports captions and view-once.

send_group_message

Send a text message to a group. Supports quoted replies and @mentions.

send_group_sticker

Send a sticker to a group.

send_message

Send a text message to a contact. Supports quoted replies (quoteauthor, quotetimestamp).

send_note_to_self

Save a note to yourself (Signal's saved messages).

send_read_receipt

Mark messages as read. Also updates local store.

send_sticker

Send a sticker to a contact.

set_typing

Send a typing indicator to a contact.

store_stats

Total message count, oldest and newest message dates.

unblock_contact

Unblock a contact.

unpin_message

Unpin a message in a DM or group conversation.

update_contact

Set a local display name for a contact.

update_group

Rename, add/remove members, promote/demote admins, set expiry timer.

update_profile

Update your own name, about text, or avatar.

upload_sticker_pack

Upload and publish a sticker pack from a local manifest.json or zip. Returns the signal.art URL.

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about Signal MCP Server

How do I connect Signal MCP Server to Claude?: Run `claude mcp add signal-mcp -- uvx signal-mcp serve` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.
Is Signal MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can Signal MCP Server do?: Signal MCP Server documents 40 tools to the agent, including add_sticker_pack, admin_delete_message, block_contact. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.