# Nacre

> Self-hosted permission-aware context layer. Search returns only what the caller may read.

- name: work.nacre/nacre
- version: 0.26.4
- connection class: L0 (run_local_package)
- trust: 94/100
- quality: –/100 (not scored)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/work.nacre%2Fnacre
- tools: https://api.protogrid.dev/v1/servers/work.nacre%2Fnacre/tools

**Runs on your machine: something must execute the package.** Only local packages are published (npm, PyPI, OCI, …). The registry never executes them, so tools are unknown until you run it.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "nacre": {
      "command": "npx",
      "args": [
        "-y",
        "@nacre.work/mcp@0.26.4"
      ],
      "env": {
        "NACRE_SERVICE_KEY": "${NACRE_SERVICE_KEY}"
      }
    }
  }
}
```

Placeholders to fill: `${NACRE_SERVICE_KEY}`.

## Trust

- hygiene: 100
- liveness: n/a
- freshness: 100
- provenance: 85
- drivers: +repository +dns-namespace +website ~liveness-unmeasured +updated-25d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality –/100 (not scored)

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

### protocol: n/a (weight 25)

- n/a `protocol.modern`, `protocol.stateless`, `protocol.transport`, `protocol.list_ttl`: no remote answered a protocol handshake (not probed yet, unreachable, or local-only)

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: n/a (weight 30)

- n/a `tools.descriptions`, `tools.description_length`, `tools.schemas`, `tools.annotations`, `tools.directory_hints`, `tools.token_cost`, `tools.api_dump`: tool list unknown (behind auth, not probed, or empty)

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool list unknown

### dependencies: 50 (weight 15)

- fail `deps.known_vulns`: 2 advisories to act on (malicious, or rated high or critical with a fix available): GHSA-rfgv-xxqx-mfg5 in undici@7.29.0 (indirect, fixed in 7.29.1), GHSA-w293-vg96-wgc3 in undici@7.29.0 (indirect, fixed in 7.29.1); 8 more of lower severity or without a fix
- n/a `deps.mcp_sdk_version`: the official MCP SDK is not in the dependency graph
- pass `deps.resolvable`: @nacre.work/mcp@0.26.4 resolved: 23 packages

- tools: unknown
- badge: [![protogrid quality](https://protogrid.dev/badge/work.nacre/nacre.svg)](https://protogrid.dev/servers/work.nacre/nacre)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Dependencies

- npm @nacre.work/mcp@0.26.4: resolved, 22 dependencies
  - GHSA-rfgv-xxqx-mfg5 (high) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to Denial of Service via unrequested WebSocket subprotocol" https://osv.dev/vulnerability/GHSA-rfgv-xxqx-mfg5
  - GHSA-w293-vg96-wgc3 (high) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool" https://osv.dev/vulnerability/GHSA-w293-vg96-wgc3
  - GHSA-2jfj-6hjv-fm6j (moderate) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to cross-user cookie disclosure via Set-Cookie caching in shared caches" https://osv.dev/vulnerability/GHSA-2jfj-6hjv-fm6j
  - GHSA-3wwx-pv8p-q78v (moderate) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to Denial of Service via unhandled error in WebSocket permessage-deflate decompression" https://osv.dev/vulnerability/GHSA-3wwx-pv8p-q78v
  - GHSA-3xpg-4rpp-hhhm (moderate) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to Denial of Service via unbounded decompression of compressed responses" https://osv.dev/vulnerability/GHSA-3xpg-4rpp-hhhm
  - GHSA-pmjh-fq2x-6v4x (moderate) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to Denial of Service via orphaned RetryHandler response body" https://osv.dev/vulnerability/GHSA-pmjh-fq2x-6v4x
  - GHSA-rx4f-c7p8-82vq (moderate) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to Denial of Service via WebSocketStream unclean close" https://osv.dev/vulnerability/GHSA-rx4f-c7p8-82vq
  - GHSA-2gqq-gqf2-x968 (low) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to response truncation via oversized chunked responses in the dump interceptor" https://osv.dev/vulnerability/GHSA-2gqq-gqf2-x968
  - GHSA-8436-99hf-9mmv (low) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to caching and replay of unsafe HTTP method responses" https://osv.dev/vulnerability/GHSA-8436-99hf-9mmv
  - GHSA-r53p-7pc4-xj5r (low) in `` undici@7.29.0 ``, indirect, fixed in `` 7.29.1 ``, advisory summary: "undici vulnerable to downstream response splitting via retry interceptor" https://osv.dev/vulnerability/GHSA-r53p-7pc4-xj5r

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

_none_

## Packages

- npm @nacre.work/mcp@0.26.4 secrets: NACRE_SERVICE_KEY

## Tools (0)

_none observed_