Do I need an API key to connect Claude?

Not for the custom connector. Claude opens a Signal8 sign-in to authorize the connection. The claude_desktop_config.json route takes an API key in SIGNAL8_API_KEY.

Which plan includes MCP access?

Signal8 Pro, at $59/mo or $588/yr.

What is the Signal8 MCP server URL?

https://mcp.signal8.ai/mcp. It is hosted, so there is nothing to install.

Connect Signal8 to Claude

Add the hosted Signal8 MCP server to Claude web and desktop as a custom connector, or through claude_desktop_config.json. No key to paste for the connector: Claude opens a Signal8 sign-in.

Setup

Claude web & desktop

Open Settings → Connectors.
Click Add custom connector.
Paste the Signal8 server URL and connect.

https://mcp.signal8.ai/mcp

No key to paste. Claude opens a Signal8 sign-in to authorize the connection.

Claude Desktop (config file)

Prefer a config file? Add this to claude_desktop_config.json and set SIGNAL8_API_KEY to a key from the API keys tab:

claude_desktop_config.json

{
  "mcpServers": {
    "signal8": {
      "command": "npx",
      "args": ["-y", "@signal8ai/mcp"],
      "env": {
        "SIGNAL8_API_KEY": "sk_live_YOUR_KEY"
      }
    }
  }
}

Claude Code (CLI)

Run this in your terminal:

terminal

claude mcp add --transport http signal8 https://mcp.signal8.ai/mcp \
  --header "Authorization: Bearer sk_live_YOUR_KEY"

Replace sk_live_YOUR_KEY with a key from the API keys tab.

Claude Code setup →

Then ask

Once connected, Claude can call any of the 113 Signal8 tools. Ask in plain English and it picks the right one.

Browse all tools Dilution tools

Questions

Do I need an API key to connect Claude?: Not for the custom connector. Claude opens a Signal8 sign-in to authorize the connection. The claude_desktop_config.json route takes an API key in SIGNAL8_API_KEY.
Which plan includes MCP access?: Signal8 Pro, at $59/mo or $588/yr.
What is the Signal8 MCP server URL?: https://mcp.signal8.ai/mcp. It is hosted, so there is nothing to install.