MCP server

@sendsignal/mcp-server exposes SendSignal to AI agents over the Model Context Protocol: Claude, IDE assistants, and any other MCP client can send email and inspect your account with your permission model intact.

Configuration

The server runs over stdio and reads two environment variables:

Variable	Meaning
SENDSIGNAL_API_KEY	Required: an API key
SENDSIGNAL_BASE_URL	Optional: defaults to the hosted API

A typical MCP client entry:

{
  "mcpServers": {
    "sendsignal": {
      "command": "sendsignal-mcp",
      "env": { "SENDSIGNAL_API_KEY": "ss_..." }
    }
  }
}

Tools

Tool	Does
send_email	Send an email (POST /emails)
list_emails	List recent sends with filters
get_email_stats	The stats time series
list_domains / create_domain	Inspect and add sending domains
list_streams	Message streams
list_templates	Templates
list_automations	Automations
list_ip_pools	Dedicated IP pools

The API key’s permission applies as usual; give an agent a sending_access key if it only needs to send.