General Tools

centeringlab.com

An MCP server for measuring trading-card centering from photos and converting centering ratios into maximum PSA, BGS, CGC, and SGC grades.

1 endpoint3 known toolsFirst detected October 2, 2026Last detected October 8, 2026

ENDPOINT 1

https://centeringlab.com/mcp

No auth detected

MCP server metadata

Name: centering-lab
Version: 1.2.0

Capabilities

tools.listChanged

Server instructions

Centering Lab is free. Known numeric ratios + "is it PSA 10?" or ceiling → MUST use grade_centering, not manual calculation from get_centering_standards. Thresholds/tolerance/sources only → get_centering_standards. Unknown ratio face OR axis → ask BEFORE any tool call, never assume front/LR. Photo → ask front/back, then measure_card_centering with one actual user URL or exact COMPLETE bytes. Never invent URLs, edit/decode/repair/shorten base64; pass prefix and whitespace verbatim. Unforwardable attachment → https://centeringlab.com/. standard includes Japanese Pokémon; small is 59×86 mm (Yu-Gi-Oh!). Sleeves/toploaders, tilted or borderless → retake/back/manual site first. needs-review/failed: no usable ceiling. Report incomplete and approximate/interpreted sources. This is a ceiling from centering alone, not a prediction of the final grade. TAG excluded, never substitute PSA unless requested; SGC back has no table/ceiling. Respect Retry-After, no parallel retries. API photos in server memory; site photos local.

Known tools 3

grade_centering

USE THIS TOOL whenever the user supplies numeric centering ratios and asks whether a card meets PSA/BGS/CGC/SGC or asks for a centering ceiling.

Inferred read-only

get_centering_standards

USE ONLY for questions about published THRESHOLDS, tolerance, rules or SOURCES without grading the user's supplied numeric ratios.

Inferred read-only

measure_card_centering

Measure one ACTUAL photograph.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.centering-lab]
url = "https://centeringlab.com/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "centering-lab": {
      "type": "http",
      "url": "https://centeringlab.com/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: centering-lab
Remote MCP URL: https://centeringlab.com/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "centering-lab": {
      "url": "https://centeringlab.com/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "centering-lab": {
      "type": "http",
      "url": "https://centeringlab.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "centering-lab",
  "transport": "streamable-http",
  "url": "https://centeringlab.com/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.