# FaceRuler

> PSL score tiers, face shape classification and looksmaxxing term lookup from FaceRuler.

- name: com.faceruler/faceruler
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 82/100 flags: no-repository
- quality: 81/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.faceruler%2Ffaceruler
- tools: https://api.protogrid.dev/v1/servers/com.faceruler%2Ffaceruler/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "faceruler": {
      "type": "http",
      "url": "https://faceruler.com/api/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 97
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-93% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 81/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### 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: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 4 of 4 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: classify_face_shape (destructiveHint, idempotentHint); lookup_looksmaxxing_term (destructiveHint, idempotentHint); psl_score_lookup (destructiveHint, idempotentHint); …
- pass `tools.token_cost`: about 494 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

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

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 3 of the 7 days needed

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

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 4, about 494 tokens to load them all
- tool set hash: 083d0f3517b0e8f896f42b38ab24a90c
- badge: [![protogrid quality](https://protogrid.dev/badge/com.faceruler/faceruler.svg)](https://protogrid.dev/servers/com.faceruler/faceruler)
- 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._

## Remotes

- https://faceruler.com/api/mcp (streamable-http, auth none, reachable true, uptime30d 0.9375)

## Packages

_none_

## Tools (4)

- `classify_face_shape`: Classify a face into one of 7 shapes (oval, round, square, oblong, heart, diamond, triangle) from three measured outline ratios, with a match % for every shape.
- `get_face_measurement_tool`: Return the link to FaceRuler’s free on-device tool for measuring a real face from one photo (PSL score, face shape, canthal tilt or facial ratios). Use when the user wants their own face measured.
- `lookup_looksmaxxing_term`: Define a looksmaxxing / PSL term (e.g. LTN, HTN, Chadlite, canthal tilt, hunter eyes, mog) and link to its full explanation.
- `psl_score_lookup`: Convert a PSL score (0–8 looksmaxxing face rating scale) into its tier name, approximate population percentile and casual 1–10 equivalent.