_ registry / mcp streamable-http

centering-lab

https://centeringlab.com

Registry code: e8a14989f6ea0a6b

api record

Centering Lab measures collectible card centering and explains published standards. Use grade_centering for known ratios; get_centering_standards for thresholds and sources; measure_card_centering for one photo with explicit front/back. This is a ceiling from centering alone, not a prediction of the final grade. Missing axes or the other face can lower ceilings. Approximate/interpreted thresholds must be disclosed. needs-review/failed: no grade ceilings, suggest a better photograph or correction at https://centeringlab.com/. Photos sent to tools reach our server and are processed only in…

endpoint
https://centeringlab.com/mcp
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing
karma
0 · newcomer
reachable
unknown
uptime
—
latency
—

last good check

priced tools
0

of 3 tools

_ used through this hub 30 days

The one measurement on this page that an operator cannot produce by editing a file on its own server: somebody else chose it, and paid to. Read the accounts before the calls — volume from one account is one relationship, and calling yourself is the cheap half. Both are what the ranking is built from, printed so the order can be checked rather than taken on trust.

accounts
0

distinct, expensive to fake

calls served
0

successful, last 30 days

_ what it can do 3 tools
3 never probed 0 of 3 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • grade_centering unknown never probed

    Convert known card centering ratios into the maximum grade permitted by centering at PSA, BGS, CGC and SGC. Use for questions such as “is 58/42 a PSA 10?” without needing a photo. Accept reversed ratios and percentages. At least one axis is required. Missing axes or faces may lower the ceiling; never describe it as a predicted grade. BGS uses both axes. Return provenance, limiting face/axis and distance to the next step.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "back_lr": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 100,
          "minimum": 0
        },
        {
          "type": "string",
          "maxLength": 40,
          "minLength": 1
        }
      ],
      "description": "A percentage (55 or 45), or two percentages summing to 100 (\"55/45\" or \"45/55\"). Normalized to the larger side."
    },
    "back_tb": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 100,
          "minimum": 0
        },
        {
          "type": "string",
          "maxLength": 40,
          "minLength": 1
        }
      ],
      "description": "A percentage (55 or 45), or two percentages summing to 100 (\"55/45\" or \"45/55\"). Normalized to the larger side."
    },
    "front_lr": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 100,
          "minimum": 0
        },
        {
          "type": "string",
          "maxLength": 40,
          "minLength": 1
        }
      ],
      "description": "A percentage (55 or 45), or two percentages summing to 100 (\"55/45\" or \"45/55\"). Normalized to the larger side."
    },
    "front_tb": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 100,
          "minimum": 0
        },
        {
          "type": "string",
          "maxLength": 40,
          "minLength": 1
        }
      ],
      "description": "A percentage (55 or 45), or two percentages summing to 100 (\"55/45\" or \"45/55\"). Normalized to the larger side."
    }
  },
  "additionalProperties": false
}
    arguments 67 lines
  • get_centering_standards unknown never probed

    Look up card centering thresholds for PSA, BGS, CGC and SGC, optionally by house and front/back. Use for threshold/rules questions and source checks. Returns per-band official/interpreted/approximate status, source links, verification date/provenance and rounding rule. TAG is excluded. These are centering ceilings, not grade predictions.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "face": {
      "enum": [
        "front",
        "back"
      ],
      "type": "string"
    },
    "house": {
      "enum": [
        "PSA",
        "BGS",
        "CGC",
        "SGC"
      ],
      "type": "string"
    }
  },
  "additionalProperties": false
}
    arguments 23 lines
  • measure_card_centering unknown never probed

    Measure worst-station left/right and top/bottom card centering from one photograph. Ask front or back before calling. Request a whole card, flat on a dark surface, straight from above and out of its sleeve. The photo is processed on the server in memory and discarded, unlike the local-only website. Use a public HTTPS URL or image bytes supported by the client. If a chat attachment cannot be passed to this remote tool, send the user to https://centeringlab.com/. needs-review or failed means no grade ceilings: suggest a retake or manual website adjustment. Never predict a final grade.

    mcp-tool

    {
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "face"
  ],
  "properties": {
    "face": {
      "enum": [
        "front",
        "back"
      ],
      "type": "string",
      "description": "Required: ask the user whether the photo shows the front or back if unclear."
    },
    "card_size": {
      "enum": [
        "standard",
        "small"
      ],
      "type": "string",
      "default": "standard",
      "description": "standard = 63×88 mm; small = 59×86 mm."
    },
    "image_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 8192,
      "description": "Public HTTPS image URL, port 443. Private network addresses and non-image responses are rejected."
    },
    "image_base64": {
      "type": "string",
      "maxLength": 12582912,
      "minLength": 4,
      "description": "Raw base64 encoded raster image, without a data-URL prefix. Intended for clients that can supply image bytes."
    }
  },
  "additionalProperties": false
}
    arguments 39 lines
_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/e8a14989f6ea0a6b/badge.svg)](https://brick.blue/agent/e8a14989f6ea0a6b)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Own the domain? Prove it and the listing carries a verified badge here too: passport.

_ how we know
card completeness
70%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.