# DarkMatter (npm · @darkmatterhub/mcp-server)

Tamper-evident records of AI agent decisions. Verify offline, or publish a proof link.

- Trust score: 82/100 (high trust)
- Change this week: 0
- Registry status: deprecated
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

> **Deprecated**: this server is marked deprecated in the MCP registry.

## Components

- npm · `@darkmatterhub/mcp-server`: 82/100 (this document), [markdown](https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server.md), [page](https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@darkmatterhub/mcp-server`
- Version: `0.3.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 96 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 22 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 82/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 469 tokens (~93/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 80/100
  - Stability observed for 24 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the DarkMatter MCP server?

DarkMatter runs locally as an npm package, launched with npx -y @darkmatterhub/mcp-server. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add darkmatter-hub-mcp-server -- npx -y @darkmatterhub/mcp-server
```

### Cursor

```json
{
  "mcpServers": {
    "darkmatter-hub-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "darkmatter-hub-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add darkmatter-hub-mcp-server -- npx -y @darkmatterhub/mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "darkmatter-hub-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@darkmatterhub/mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add darkmatter-hub-mcp-server --command npx --arg -y --arg @darkmatterhub/mcp-server
```

### Hermes

```yaml
mcp_servers:
  darkmatter-hub-mcp-server:
    command: "npx"
    args: ["-y", "@darkmatterhub/mcp-server"]
```

### Netclaw

```json
{
  "McpServers": {
    "darkmatter-hub-mcp-server": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@darkmatterhub/mcp-server"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add darkmatter-hub-mcp-server -t stdio -c npx -a -y @darkmatterhub/mcp-server
```

### Other

```json
{
  "mcpServers": {
    "darkmatter-hub-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@darkmatterhub/mcp-server"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 82, −3)

- [functional] Stability: pass → 0.80

### 2026-09-19 (score 85, 0)

- [security] Stability: 0.97 → pass

### 2026-09-18 (score 85, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (5)

### `darkmatter_commit` (~261 tokens)

Commit a Context Passport record of an agent decision or action. Returns a verifiable record id and verify_url. Use this when the agent makes a decision worth recording for later audit or verification.

Input parameters:

- `agent_id` (string): Optional. Identifier for the calling agent.
- `agent_name` (string): Optional. Human-readable agent name.
- `event_type` (string): Optional. One of: commit, fork, checkpoint, spawn, retry, timeout, error, override, consent, escalate, redact, audit. Defaults to 'commit'.
- `input`: What the agent received (string or object).
- `memory` (object): Optional. Persistent state / tool results.
- `model` (string): Optional. Model name.
- `output`: What the agent produced (string or object).
- `provider` (string): Optional. LLM provider (anthropic, openai, mistral, etc).
- `role` (string): Optional. Semantic role (researcher, writer, reviewer, etc).
- `session_id` (string): Optional. Groups passports into a chain. Defaults to 'default'.
- `trace_id` (string): Optional. Groups commits into a pipeline run.
- `variables` (object): Optional. Named values for downstream agents.

### `darkmatter_verify` (~68 tokens)

Verify the integrity of the Context Passport chain for a session. Returns true if the hash chain is intact and no records have been tampered with.

Input parameters:

- `id` (string): Optional. Verify up to this passport id only.
- `session_id` (string): Optional. Defaults to 'default'.

### `darkmatter_replay` (~60 tokens)

Walk the Context Passport chain for a session and return the full payload at each step in chronological order.

Input parameters:

- `id` (string): Optional. Replay up to this passport id only.
- `session_id` (string): Optional. Defaults to 'default'.

### `darkmatter_export` (~54 tokens)

Export a portable JSON bundle of the entire chain for a session. The bundle is self-contained and can be verified by any third party without contacting DarkMatter.

Input parameters:

- `session_id` (string): Optional. Defaults to 'default'.

### `darkmatter_list_sessions` (~26 tokens)

List all session ids that have at least one committed Context Passport in local storage.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server#diagnostics

## Score history

- 2026-09-20: 82
- 2026-09-19: 85
- 2026-09-18: 85
- 2026-09-17: 84
- 2026-09-16: 84
- 2026-09-15: 83
- 2026-09-14: 83
- 2026-09-13: 82
- 2026-09-12: 82
- 2026-09-11: 81
- 2026-09-10: 81
- 2026-09-09: 81
- 2026-09-08: 80
- 2026-09-07: 80
- 2026-09-06: 79
- 2026-09-05: 79
- 2026-09-04: 78
- 2026-09-03: 78
- 2026-09-02: 77
- 2026-09-01: 77
- 2026-08-31: 76
- 2026-08-30: 76
- 2026-08-29: 75
- 2026-08-28: 75
- 2026-08-27: 71
- 2026-08-26: 71
- 2026-08-25: 70
- 2026-08-24: 70
- 2026-08-23: 70
- 2026-08-22: 70

## Common questions

### What is the DarkMatter MCP server?

DarkMatter is an MCP server listed in the public MCP registry as io.github.darkmatter-hub/mcp-server. Tamper-evident records of AI agent decisions. Verify offline, or publish a proof link. This page covers its npm package (@darkmatterhub/mcp-server).

### Is the DarkMatter MCP server safe to use?

DarkMatter scores 82 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the DarkMatter MCP server expose?

DarkMatter exposes 5 tools: darkmatter_commit, darkmatter_verify, darkmatter_replay, darkmatter_export, darkmatter_list_sessions. Their descriptions and schemas cost roughly 469 tokens of context every time the server is loaded.

### Is the DarkMatter MCP server still maintained?

DarkMatter is marked deprecated in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the DarkMatter MCP server under?

DarkMatter declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@darkmatterhub/mcp-server
- Socket report: https://socket.dev/npm/package/@darkmatterhub/mcp-server
- Repository: https://github.com/darkmatter-hub/mcp
- Website: https://darkmatterhub.ai/
- Changelog RSS feed: https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server.xml
- Changelog JSON feed: https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server.json
- HTML version of this page: https://verifymcp.io/servers/darkmatter-hub-mcp-server/darkmatterhub-mcp-server