signal-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| SIGNAL_MCP_DB | No | Signal SQLCipher database path | %APPDATA%\Signal\sql\db.sqlite |
| SIGNAL_MCP_KEY | No | Explicit 64-character SQLCipher key. Defaults to automatic recovery with DPAPI. | |
| SIGNAL_MCP_HOST | No | Remote listener host | 127.0.0.1 |
| SIGNAL_MCP_PORT | No | Remote listener port | 8788 |
| SIGNAL_MCP_CONFIG | No | Signal config.json path | %APPDATA%\Signal\config.json |
| SIGNAL_MCP_AUTH_MODE | No | static or oidc | static |
| SIGNAL_MCP_TRANSPORT | No | stdio or authenticated http | stdio |
| SIGNAL_MCP_PUBLIC_URL | No | Canonical public HTTPS URL ending in /mcp. Required for HTTP mode. | |
| SIGNAL_MCP_LOCAL_STATE | No | Signal Chromium Local State path | %APPDATA%\Signal\Local State |
| SIGNAL_MCP_BEARER_TOKEN | No | Fixed token, at least 32 characters. Required for static mode. | |
| SIGNAL_MCP_MAX_MESSAGES | No | Per-call message cap (cannot exceed 200) | 200 |
| SIGNAL_MCP_OAUTH_ISSUER | No | OAuth/OIDC issuer URL. Required for OIDC mode. | |
| SIGNAL_MCP_MAX_BODY_BYTES | No | HTTP request cap, up to 4 MiB | 1048576 |
| SIGNAL_MCP_OAUTH_AUDIENCE | No | Expected JWT audience. Required for OIDC mode. | |
| SIGNAL_MCP_ALLOWED_ORIGINS | No | Additional permitted browser origins | |
| SIGNAL_MCP_REQUIRED_SCOPES | No | Comma-separated access-token scopes | signal:read |
| SIGNAL_MCP_MAX_CONVERSATIONS | No | Conversation cap (cannot exceed 100) | 100 |
| SIGNAL_MCP_RATE_LIMIT_PER_MINUTE | No | Per-client request limit | 120 |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
This server cannot be deployed
Maintenance
ActivityMaintained
ResponsivenessNo issues