# Touchstone (npm · @touchstone-cv/mcp)

Bitcoin-anchored, tamper-evident audit log for AI agents — record, disclose and verify actions.

- Trust score: 79/100 (medium)
- Change this week: −8
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `touchstone.cv`: 33/100, [markdown](https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone.md), [page](https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone)
- npm · `@touchstone-cv/mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone-cv-mcp.md), [page](https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone-cv-mcp)

## Channel facts

- Registry: `npm`
- Package: `@touchstone-cv/mcp`
- 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 2026-08-03.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to Touchstone-CV/touchstone-mcp).
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 23 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 57/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 291 tokens (~72/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 90/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 70% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add cv-touchstone-touchstone -- npx -y @touchstone-cv/mcp
```

### Codex

```bash
codex mcp add cv-touchstone-touchstone -- npx -y @touchstone-cv/mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add cv-touchstone-touchstone --command npx --arg -y --arg @touchstone-cv/mcp
```

### Hermes

```yaml
mcp_servers:
  cv-touchstone-touchstone:
    command: "npx"
    args: ["-y", "@touchstone-cv/mcp"]
```

### Other

```json
{
  "mcpServers": {
    "cv-touchstone-touchstone": {
      "command": "npx",
      "args": [
        "-y",
        "@touchstone-cv/mcp"
      ]
    }
  }
}
```

## 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.

### 2026-08-03 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 78, +18)

- [security improvement] Malware scan: unverified → pass
- [functional improvement] Stability: unverified → 0.23

### 2026-08-01 (score 60, −9)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 69, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 87, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 87)

First indexed and scored.

## MCP tools (4)

### `touchstone_record` (~139 tokens)

Sign (locally, key never leaves this machine) and append an event to your recorder.

Input parameters:

- `client_ts` (string): optional ISO-8601 UTC
- `counterparty_sub` (string): optional: the other party's Colony sub
- `event_type` (string, required): e.g. tool_call, decision, commitment
- `payload` (object, required): arbitrary JSON describing what happened
- `selective_disclosure` (boolean): commit each field separately (salted Merkle root) so a later disclosure can reveal a subset of fields and withhold the rest
- `store_payload` (boolean): default true; false keeps only the hash

### `touchstone_recorder_info` (~24 tokens)

Your recorder: id, subject, trust tier, head sequence.

### `touchstone_disclose` (~58 tokens)

Create a shareable, independently-verifiable disclosure of selected entries.

Input parameters:

- `reveal` (object): optional selective-disclosure map {seq: [field keys to reveal]}; unlisted fields stay withheld
- `seqs` (array, required)

### `touchstone_verify` (~33 tokens)

Independently verify a disclosure (token or bundle).

Input parameters:

- `bundle` (object)
- `token` (string)

## Diagnostics

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

## Score history

- 2026-08-03: 79
- 2026-08-02: 78
- 2026-08-01: 60
- 2026-07-31: 69
- 2026-07-29: 87
- 2026-07-28: 87
- 2026-07-27: 87
- 2026-07-26: 87

## Links

- npm package: https://www.npmjs.com/package/@touchstone-cv/mcp
- Socket report: https://socket.dev/npm/package/@touchstone-cv/mcp
- Repository: https://github.com/Touchstone-CV/touchstone-mcp
- Changelog RSS feed: https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone-cv-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone-cv-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/cv-touchstone-touchstone/touchstone-cv-mcp