# Signet MCP Tools (npm · @signet-auth/mcp-tools)

MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio.

- Trust score: 68/100 (medium)
- Change this week: +22
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-04

## Components

- npm · `@signet-auth/mcp-tools`: 68/100 (this document), [markdown](https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools.md), [page](https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools)

## Channel facts

- Registry: `npm`
- Package: `@signet-auth/mcp-tools`
- Version: `0.4.1`
- 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 2026-08-04.

- **Supply Chain Security**: 83/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known medium-severity CVE affects hono 4.12.33, reached via @modelcontextprotocol/sdk > hono. A fixed version is available.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
- **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 OR MIT).
  - Actively maintained (last published 88 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 283 tokens (~70/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add prismer-ai-signet-mcp-tools -- npx -y @signet-auth/mcp-tools
```

### Codex

```bash
codex mcp add prismer-ai-signet-mcp-tools -- npx -y @signet-auth/mcp-tools
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add prismer-ai-signet-mcp-tools --command npx --arg -y --arg @signet-auth/mcp-tools
```

### Hermes

```yaml
mcp_servers:
  prismer-ai-signet-mcp-tools:
    command: "npx"
    args: ["-y", "@signet-auth/mcp-tools"]
```

### Other

```json
{
  "mcpServers": {
    "prismer-ai-signet-mcp-tools": {
      "command": "npx",
      "args": [
        "-y",
        "@signet-auth/mcp-tools"
      ]
    }
  }
}
```

## 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.

### 2026-08-04 (score 68, +4)

- [security regression] CVE-2026-69207 affects this package: medium
- [security regression] Known CVEs: partial → fail
- [functional improvement] Stability: unverified → 0.30

### 2026-08-02 (score 64, +43)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional improvement] Schema quality: unverified → good
- [functional] Licence: Apache-2.0 OR MIT

### 2026-08-01 (score 21, −7)

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

### 2026-07-31 (score 28, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-28 (score 46, +22)

- [functional regression] Security disclosure: unverified → fail
- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: unverified
- [functional] First check of Tool coverage: 100

### 2026-07-27 (score 24)

First indexed and scored.

## MCP tools (4)

### `signet_generate_keypair` (~36 tokens)

Generate a new Ed25519 keypair. Returns only the public key. Use Signet CLI to manage secret keys securely.

### `signet_sign` (~122 tokens)

Sign an action (tool call) with an Ed25519 key, producing a cryptographic receipt. Uses SIGNET_SECRET_KEY env var if set, otherwise requires secret_key argument.

Input parameters:

- `params`: Tool parameters (any JSON value)
- `secret_key` (string): Base64 secret key (optional if SIGNET_SECRET_KEY env is set)
- `signer_name` (string, required): Agent name
- `signer_owner` (string): Agent owner (optional)
- `target` (string): Target MCP server URI
- `tool` (string, required): Tool name being called

### `signet_verify` (~71 tokens)

Verify a Signet receipt signature. Returns {valid: true/false}. Accepts both bare base64 and ed25519:-prefixed public keys.

Input parameters:

- `public_key` (string, required): Public key (base64 or ed25519:base64)
- `receipt_json` (string, required): Receipt JSON string

### `signet_content_hash` (~54 tokens)

Compute SHA-256 hash of canonical JSON (RFC 8785 JCS). Accepts any JSON value.

Input parameters:

- `content` (required): JSON content to hash (object, array, string, number, boolean, or null)

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools#diagnostics

## Score history

- 2026-08-04: 68
- 2026-08-03: 64
- 2026-08-02: 64
- 2026-08-01: 21
- 2026-07-31: 28
- 2026-07-30: 46
- 2026-07-28: 46
- 2026-07-27: 24

## Links

- npm package: https://www.npmjs.com/package/@signet-auth/mcp-tools
- Socket report: https://socket.dev/npm/package/@signet-auth/mcp-tools
- Repository: https://github.com/Prismer-AI/signet
- Changelog RSS feed: https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools/changelog.json
- HTML version of this page: https://verifymcp.io/servers/prismer-ai-signet-mcp-tools/signet-auth-mcp-tools