Koskamo

Aletheia MCP

Aletheia MCP is a deterministic, pattern-based pre-execution filter for AI agents that intercepts tool calls before they run. It blocks scope creep (S3) and prompt injection (S2b) with sub-millisecond overhead, acting as a fast first-line defense without using an LLM in the hot path.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Aletheia MCP logo, by vikasny30Community listingLocal stdioSource reviewed; not executedPublished by vikasny30
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Popularity 12 GitHub stars

What you can do with it

  • Block scope creep tool calls
  • Filter prompt injection patterns
  • Prevent destructive agent actions

Source and maintenance

Community listingRegistry 0.3.1
mcp-registry: io.github.vikasny30/aletheia-mcp@0.3.1Source repositoryProject website
Last repository push
Latest release
v0.3.1
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

aletheia-mcp 0.3.1

npm
aletheia-mcp package definition
{
  "version": "0.3.1",
  "transport": "stdio",
  "identifier": "aletheia-mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "packageArguments": [
    {
      "name": "--allow-write",
      "type": "named",
      "description": "Authorize filesystem writes and mutations (default: read-only)."
    },
    {
      "name": "--allow-network",
      "type": "named",
      "description": "Authorize outbound network requests (default: local-only)."
    },
    {
      "name": "--allow-loopback",
      "type": "named",
      "description": "Authorize requests to localhost / 127.0.0.1 dev servers (default: blocked)."
    },
    {
      "name": "--allowed-paths",
      "type": "named",
      "format": "filepath",
      "description": "Comma-separated list of directories writes are confined to (default: current working directory)."
    }
  ],
  "environmentVariables": [
    {
      "name": "ALETHEIA_ALLOW_WRITE",
      "description": "Set to \"true\" to authorize filesystem writes (equivalent to --allow-write)."
    },
    {
      "name": "ALETHEIA_ALLOW_NETWORK",
      "description": "Set to \"true\" to authorize outbound network requests (equivalent to --allow-network)."
    },
    {
      "name": "ALETHEIA_ALLOW_LOOPBACK",
      "description": "Set to \"true\" to authorize requests to localhost / 127.0.0.1 (equivalent to --allow-loopback)."
    },
    {
      "name": "ALETHEIA_OPERATOR_SECRET",
      "description": "Operator token required to loosen an already-running session's mandate at runtime."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "aletheia-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "aletheia-mcp@0.3.1"
      ],
      "env": {
        "ALETHEIA_ALLOW_WRITE": "<YOUR_ALETHEIA_ALLOW_WRITE>",
        "ALETHEIA_ALLOW_NETWORK": "<YOUR_ALETHEIA_ALLOW_NETWORK>",
        "ALETHEIA_ALLOW_LOOPBACK": "<YOUR_ALETHEIA_ALLOW_LOOPBACK>",
        "ALETHEIA_OPERATOR_SECRET": "<YOUR_ALETHEIA_OPERATOR_SECRET>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "aletheia-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "aletheia-mcp@0.3.1"
      ],
      "env": {
        "ALETHEIA_ALLOW_WRITE": "<YOUR_ALETHEIA_ALLOW_WRITE>",
        "ALETHEIA_ALLOW_NETWORK": "<YOUR_ALETHEIA_ALLOW_NETWORK>",
        "ALETHEIA_ALLOW_LOOPBACK": "<YOUR_ALETHEIA_ALLOW_LOOPBACK>",
        "ALETHEIA_OPERATOR_SECRET": "<YOUR_ALETHEIA_OPERATOR_SECRET>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "aletheia-mcp-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "aletheia-mcp@0.3.1"
      ],
      "env": {
        "ALETHEIA_ALLOW_WRITE": "<YOUR_ALETHEIA_ALLOW_WRITE>",
        "ALETHEIA_ALLOW_NETWORK": "<YOUR_ALETHEIA_ALLOW_NETWORK>",
        "ALETHEIA_ALLOW_LOOPBACK": "<YOUR_ALETHEIA_ALLOW_LOOPBACK>",
        "ALETHEIA_OPERATOR_SECRET": "<YOUR_ALETHEIA_OPERATOR_SECRET>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "aletheia-mcp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "aletheia-mcp@0.3.1"
      ],
      "env": {
        "ALETHEIA_ALLOW_WRITE": "<YOUR_ALETHEIA_ALLOW_WRITE>",
        "ALETHEIA_ALLOW_NETWORK": "<YOUR_ALETHEIA_ALLOW_NETWORK>",
        "ALETHEIA_ALLOW_LOOPBACK": "<YOUR_ALETHEIA_ALLOW_LOOPBACK>",
        "ALETHEIA_OPERATOR_SECRET": "<YOUR_ALETHEIA_OPERATOR_SECRET>"
      }
    }
  }
}

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