Aletheia Runtime Safety & Scope Creep Filter MCP Server
API key requiredDeterministic pre-execution filter that blocks known scope-creep and prompt-injection tool calls
To add Aletheia Runtime Safety & Scope Creep Filter to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 4 environment variables, listed below.
Install
npx -y aletheia-mcp@0.3.1Environment variables
ALETHEIA_ALLOW_WRITESet in your MCP configALETHEIA_ALLOW_NETWORKSet in your MCP configALETHEIA_ALLOW_LOOPBACKSet in your MCP configALETHEIA_OPERATOR_SECRETSet in your MCP configInstall with your client
claude mcp add aletheia-runtime-safety-scope-creep-filter --env ALETHEIA_ALLOW_WRITE=<YOUR_ALETHEIA_ALLOW_WRITE> --env ALETHEIA_ALLOW_NETWORK=<YOUR_ALETHEIA_ALLOW_NETWORK> --env ALETHEIA_ALLOW_LOOPBACK=<YOUR_ALETHEIA_ALLOW_LOOPBACK> --env ALETHEIA_OPERATOR_SECRET=<YOUR_ALETHEIA_OPERATOR_SECRET> -- npx -y aletheia-mcp@0.3.1
Run this in a terminal to add the server to Claude Code.
What this does
Aletheia Runtime Safety & Scope Creep Filter exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
ALETHEIA_ALLOW_WRITE ALETHEIA_ALLOW_NETWORK ALETHEIA_ALLOW_LOOPBACK ALETHEIA_OPERATOR_SECRET
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Aletheia Runtime Safety & Scope Creep Filter?
Run the Claude Code command in the install section to add Aletheia Runtime Safety & Scope Creep Filter to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with Aletheia Runtime Safety & Scope Creep Filter?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to Aletheia Runtime Safety & Scope Creep Filter as well.
Does Aletheia Runtime Safety & Scope Creep Filter need an API key?
Yes. Before it can run, set these environment variables: ALETHEIA_ALLOW_WRITE, ALETHEIA_ALLOW_NETWORK, ALETHEIA_ALLOW_LOOPBACK, ALETHEIA_OPERATOR_SECRET. They go in the env block of your MCP config.
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