DarkMatter MCP

A universal MCP server that emits Context Passport records for AI agent decisions and actions. It provides tools to commit tamper-evident records, verify chain integrity, replay decision history, and export portable proof bundles for offline verification.

Visit DarkMatter

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by DarkMatter

You need:Get your API key at darkmatterhub.ai/signup

Vendor documentation

What you can do with it

Record an agent decision or action as a tamper-evident record
Check that the decision chain has not been tampered with
Walk the full decision chain in chronological order
Produce a portable JSON proof bundle for offline verification

Source and maintenance

Community listingRegistry 0.4.0

mcp-registry: io.github.darkmatter-hub/verifiable-agent-audit-trail@0.4.0 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

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

@darkmatterhub/mcp-server 0.4.0

npmnpx

@darkmatterhub/mcp-server package definition

{
  "version": "0.4.0",
  "transport": "stdio",
  "identifier": "@darkmatterhub/mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "runtimeArguments": [
    {
      "type": "positional",
      "value": "-y"
    }
  ],
  "environmentVariables": [
    {
      "name": "DARKMATTER_API_KEY",
      "description": "Optional. Publishes each record to DarkMatter and returns a verification URL. Without it, records stay on local disk and verify offline."
    },
    {
      "name": "DARKMATTER_SHARE",
      "default": "false",
      "description": "Optional. Set to 'true' to make published records readable by anyone holding the link. Off by default."
    },
    {
      "name": "DARKMATTER_API_URL",
      "description": "Optional. Override the API host. Defaults to https://darkmatterhub.ai."
    },
    {
      "name": "DARKMATTER_MCP_STORE_DIR",
      "description": "Optional. Directory for local record storage."
    }
  ]
}

Tools

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

No tool definitions available.

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": {
    "darkmatter-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server@0.4.0"
      ],
      "env": {
        "DARKMATTER_API_KEY": "<YOUR_DARKMATTER_API_KEY>",
        "DARKMATTER_SHARE": "<YOUR_DARKMATTER_SHARE>",
        "DARKMATTER_API_URL": "<YOUR_DARKMATTER_API_URL>",
        "DARKMATTER_MCP_STORE_DIR": "<YOUR_DARKMATTER_MCP_STORE_DIR>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "darkmatter-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server@0.4.0"
      ],
      "env": {
        "DARKMATTER_API_KEY": "<YOUR_DARKMATTER_API_KEY>",
        "DARKMATTER_SHARE": "<YOUR_DARKMATTER_SHARE>",
        "DARKMATTER_API_URL": "<YOUR_DARKMATTER_API_URL>",
        "DARKMATTER_MCP_STORE_DIR": "<YOUR_DARKMATTER_MCP_STORE_DIR>"
      }
    }
  }
}

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": {
    "darkmatter-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server@0.4.0"
      ],
      "env": {
        "DARKMATTER_API_KEY": "<YOUR_DARKMATTER_API_KEY>",
        "DARKMATTER_SHARE": "<YOUR_DARKMATTER_SHARE>",
        "DARKMATTER_API_URL": "<YOUR_DARKMATTER_API_URL>",
        "DARKMATTER_MCP_STORE_DIR": "<YOUR_DARKMATTER_MCP_STORE_DIR>"
      }
    }
  }
}

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": {
    "darkmatter-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server@0.4.0"
      ],
      "env": {
        "DARKMATTER_API_KEY": "<YOUR_DARKMATTER_API_KEY>",
        "DARKMATTER_SHARE": "<YOUR_DARKMATTER_SHARE>",
        "DARKMATTER_API_URL": "<YOUR_DARKMATTER_API_URL>",
        "DARKMATTER_MCP_STORE_DIR": "<YOUR_DARKMATTER_MCP_STORE_DIR>"
      }
    }
  }
}

Let your agent find its tools

Find servers like DarkMatter MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows

See all 4,464