Prototype · Preview: every server in the official registry, synced every 30 minutes. Reviews and accounts come in a later step.
PopNx MCPMCP servers for people who use AI · explained in plain words

CardWorthScanner — TCG Price, Centering & PSA Grading ROI Engine

by cardworthscanner.comversion 1.0.0i★ –iRuns in the cloud
Registry namecom.cardworthscanner/mcp

Install

Overview

Description from the maker (original English)

Calculate PSA/BGS/CGC card grading ROI, 55/45 centering grades & Pokemon/Yu-Gi-Oh market values.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Games, sports, food & learning

Install

Pick the AI app you use, then copy the settings.

Before you install

  • Basic checks: 2 of 3 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • Can do 3 things (tools) calculate_psa_grading_roi, calculate_card_centering_grade, lookup_tcg_card_market_price
  • The registry lists no key to fill in.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://cardworthscanner.com/api/mcp

Run this in your terminal

claude mcp add --transport http cardworthscanner https://cardworthscanner.com/api/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "cardworthscanner": {
      "type": "http",
      "url": "https://cardworthscanner.com/api/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://cardworthscanner.com/api/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 8, 2026. The maker wrote them, not us; we show them as plain text.

  • calculate_psa_grading_roi

    Calculate deterministic PSA / BGS / CGC card grading net profit, ROI %, expected value (EV), and break-even Gem Mint probability after 12.5% marketplace fees.

  • calculate_card_centering_grade

    Calculate trading card border centering ratios (Left/Right and Top/Bottom in mm or px) and determine maximum eligible grades across PSA (55/45), BGS (Black Label 50/50), CGC, and TAG.

  • lookup_tcg_card_market_price

    Look up raw TCGplayer USD, Cardmarket EUR, PSA 9, PSA 10, and BGS 9.5 graded prices for Pokemon, Yu-Gi-Oh!, and Sports cards by name or card number (e.g. "Charizard", "4/102", "Umbreon", "Blue-Eyes White Dragon").

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

  • ! Caution

    Maker matches the repo

    The registry lists no source repo, so we cannot match the publisher (cardworthscanner.com) to the code

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 220 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 3 tool descriptions and found no hidden instructions to the AI

Compared with others in Games, sports, food & learningi

  • More stars than 0% of the other 1290 servers in this category
  • Published to the registry more recently than 100% of the other 1290 servers in this category
  • Basic checks equal to or better than 47% of the other 1290 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is CardWorthScanner — TCG Price, Centering & PSA Grading ROI Engine safe?

It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Sports MCP Server, Social Content MCP Server, Kizupi

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Sports MCP Server

by thenextgennexus.com

NBA, NFL, NHL and combined sports scores as agent tools.

Runs in the cloudUpdated today
Install

Kizupi

by miradero

The math tutor that asks why, for grades 1 to 6, with free printable word-problem worksheets.

Runs in the cloudUpdated today
Install

README from the maker

No README found in the repo

Ask PopNx