MCP MeasureMCP Measure

index observed

FaceRuler

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

Should I use this

Quality & Safety

A
Description quality
90%
Schema completeness
100%
Naming quality
85%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~582Tokens (tool definitions)
~826 BTypical response size
Minimal attention impact (0.45% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "faceruler": {
      "url": "https://faceruler.com/api/mcp"
    }
  }
}

Remote endpoints

https://faceruler.com/api/mcpstreamable-http

What it can do

Tool inventory

Tools (4)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢psl_score_lookup(psl)

Convert a PSL score (0–8 looksmaxxing face rating scale) into its tier name, approximate population percentile and casual 1–10 equivalent.

Input Schema

{
  "type": "object",
  "properties": {
    "psl": {
      "type": "number",
      "minimum": 0,
      "maximum": 8,
      "description": "PSL score, 0–8"
    }
  },
  "required": [
    "psl"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢classify_face_shape(faceIndex, jawRatio, foreheadRatio)

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.

Input Schema

{
  "type": "object",
  "properties": {
    "faceIndex": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Face height / face width (typical 1.1–1.5)"
    },
    "jawRatio": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Jaw (bigonial) width / face width at cheekbones (typical 0.75–1.0)"
    },
    "foreheadRatio": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Forehead (temple) width / face width (typical 0.7–0.95)"
    }
  },
  "required": [
    "faceIndex",
    "jawRatio",
    "foreheadRatio"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢lookup_looksmaxxing_term(term)

Define a looksmaxxing / PSL term (e.g. LTN, HTN, Chadlite, canthal tilt, hunter eyes, mog) and link to its full explanation.

Input Schema

{
  "type": "object",
  "properties": {
    "term": {
      "type": "string",
      "minLength": 1,
      "description": "The term to look up"
    }
  },
  "required": [
    "term"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}
🟢get_face_measurement_tool(measurement)

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.

Input Schema

{
  "type": "object",
  "properties": {
    "measurement": {
      "type": "string",
      "enum": [
        "psl",
        "face_shape",
        "canthal_tilt",
        "facial_ratios"
      ],
      "description": "What to measure"
    }
  },
  "required": [
    "measurement"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Community

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Evidence

Recent observations

verifiedversion not recorded4 tools