# PEAC Protocol: Signed interaction receipts (npm · @peac/mcp-server)

Portable signed records for agent, API, MCP, and cross-runtime interactions.

- Trust score: 78/100 (medium)
- Change this week: +32
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@peac/mcp-server`: 78/100 (this document), [markdown](https://verifymcp.io/servers/peacprotocol-peac/peac-mcp-server.md), [page](https://verifymcp.io/servers/peacprotocol-peac/peac-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@peac/mcp-server`
- Version: `0.15.0`
- 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**: 84/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known medium-severity CVE affects @hono/node-server 1.19.17, reached via @modelcontextprotocol/sdk > @hono/node-server. A fixed version is available.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (101 of 105), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to peacprotocol/peac).
  - Clear OSI-approved license (Apache-2.0).
  - Actively maintained (last published 12 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 236 tokens (~78/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 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.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add peacprotocol-peac -- npx -y @peac/mcp-server
```

### Codex

```bash
codex mcp add peacprotocol-peac -- npx -y @peac/mcp-server
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add peacprotocol-peac --command npx --arg -y --arg @peac/mcp-server
```

### Hermes

```yaml
mcp_servers:
  peacprotocol-peac:
    command: "npx"
    args: ["-y", "@peac/mcp-server"]
```

### Other

```json
{
  "mcpServers": {
    "peacprotocol-peac": {
      "command": "npx",
      "args": [
        "-y",
        "@peac/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.

### 2026-08-02 (score 78, +57)

- [security regression] GHSA-frvp-7c67-39w9 affects this package: medium
- [security regression] Known CVEs: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Provenance: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] The attested source repository moved: peacprotocol/peac
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Stability: unverified → 0.20
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional] Licence: Apache-2.0

### 2026-07-31 (score 21, −3)

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

### 2026-07-30 (score 24, −3)

- [functional regression] Dependency health: partial → unverified

### 2026-07-28 (score 27, −19)

- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Dependency health: unverified → partial
- [functional] First check of Schema quality: unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (3)

### `peac_verify` (~119 tokens)

Verify PEAC Receipt

Verify a PEAC receipt: check Ed25519 signature, validate claims, and return structured check results. Read-only, no side effects.

Input parameters:

- `audience` (string): Expected audience URI for binding check
- `issuer` (string): Expected issuer URI for binding check
- `jwks` (string): Inline JWKS JSON containing the verifying key
- `jws` (string, required): JWS compact serialization (header.payload.signature)
- `public_key_base64url` (string): Ed25519 public key in base64url encoding (32 bytes)

Output parameters:

- `_meta` (object)
- `checks` (array)
- `claimsSummary` (object)
- `code` (string)
- `keySource` (string)
- `message` (string)
- `ok` (boolean)
- `variant` (string)

### `peac_inspect` (~67 tokens)

Inspect PEAC Receipt

Inspect a PEAC receipt without verifying the signature. Returns decoded header, payload metadata, and timestamps. Read-only.

Input parameters:

- `full_claims` (boolean): Include full decoded claims (may be redacted by policy)
- `jws` (string, required): JWS compact serialization to inspect

Output parameters:

- `_meta` (object)
- `fullPayload` (object)
- `header` (object)
- `payloadMeta` (object)
- `redacted` (boolean)
- `verified` (boolean)

### `peac_decode` (~50 tokens)

Decode PEAC Receipt

Raw-decode a PEAC receipt JWS into header and payload objects. No signature check. Use peac_verify for trusted results.

Input parameters:

- `jws` (string, required): JWS compact serialization to decode

Output parameters:

- `_meta` (object)
- `header` (object)
- `payload` (object)
- `verified` (boolean)

## Diagnostics

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

## Score history

- 2026-08-03: 78
- 2026-08-02: 78
- 2026-08-01: 21
- 2026-07-31: 21
- 2026-07-30: 24
- 2026-07-28: 27
- 2026-07-27: 46

## Links

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