Flipzi MCP Server

Flipzi MCP server

Ask Claude, Cursor or any MCP client about trading card prices: search cards, get current prices, sold comps, price history, market movers, games and sets. It is a thin local wrapper over the Flipzi Data API. You bring your own Flipzi API key; the free plan needs no card.

Runs on your machine over stdio (npx). Nothing is hosted, and the only network traffic is your requests to data.flipzi.io.

Source: https://github.com/flipzitcg/flipzi-mcp. Public mirror; please report problems as GitHub issues rather than pull requests.

1. Get a key (free)

1. Create an account: https://flipzi.io/account/register?product=data&utm_source=npm&utm_medium=directory&utm_campaign=202610_mcp
2. Verify your email. A free key allowance (500 units/month, 5 requests/minute) is created for you.
3. Create a key at https://flipzi.io/account/keys (it starts with fz_live_ and is shown once).

2. Add it to your AI tool

Requires Node.js 18+. Replace fz_live_... with your key.

Claude Code

claude mcp add --env FLIPZI_API_KEY=fz_live_... --transport stdio flipzi -- npx -y @flipzitcg/mcp

Check with claude mcp list or /mcp. Add --scope user to use it in every project.

Claude Desktop (one click) — once the release publishes it, download flipzi-mcp.mcpb from the GitHub releases and open it; Claude Desktop asks for your key in a masked field.

Claude Desktop (config file) — Settings → Developer → Edit Config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows), then fully quit and reopen the app:

{
  "mcpServers": {
    "flipzi": {
      "command": "npx",
      "args": ["-y", "@flipzitcg/mcp"],
      "env": { "FLIPZI_API_KEY": "fz_live_..." }
    }
  }
}

Cursor — add the same block to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (one project). Do not commit a file containing your key.

Then ask: "What's an Umbreon VMAX worth right now?" or call flipzi_account to see your plan.

Tools

Requirements are read from the API's own contract (openapi.yaml, version in src/plans.generated.ts), not guessed. Plans and prices: https://flipzi.io/api/pricing/?utm_source=npm&utm_medium=directory&utm_campaign=202610_mcp. Every tool is always listed. When your plan does not include one, the tool says so, names the plan that does, links the upgrade, and the refusal costs 0 units.

Allowance and limits

• One unit per call (movers 5). The API counts per account per UTC month; flipzi_account shows what is left.
• The free plan allows 5 requests per minute. A short wait (≤10 s) is retried once automatically; longer waits are reported.
• Session budget: this server stops itself after FLIPZI_MCP_MAX_UNITS units per run (default 150) so an agent loop cannot burn your month. Set 0 for unlimited. Restart the server to reset it.
• Output is capped at about 20 KB per call; search returns 10 cards by default.

Settings (environment variables)

What is sent, and what Flipzi learns (no hidden telemetry)

• Your requests go to data.flipzi.io with your key, exactly as any API client would. There is no other network call, no analytics service, no update check, and no remote control.
• Each request carries User-Agent: flipzi-mcp/<version> and X-Flipzi-Client: mcp/<version>. Flipzi records only that the call came from the MCP server (the value mcp), so it can count MCP usage and see which plan-locked tools people try. Opt out with FLIPZI_MCP_NO_CLIENT_TAG=1; everything works the same.
• Links this server prints (signup, keys, upgrade) include utm_source=mcp so Flipzi can tell that an account started from here. They are plain query parameters you can delete.
• Prompts, conversations and card queries are not sent anywhere except as the API parameters of the call you asked for.

Troubleshooting

• "FLIPZI_API_KEY is not set" — the key is missing from the env of your client config; restart the client after editing.
• Tools don't appear in Claude Desktop — fully quit and reopen; check ~/Library/Logs/Claude/mcp-server-flipzi.log (macOS) or %APPDATA%\Claude\logs (Windows). On Windows, if npx fails, install npm globally (npm install -g npm).
• "Not on your plan" — expected; see the table. Run flipzi_account.
• Quote the request_id in any error when contacting support. See SUPPORT.md.

The free plan carries no commercial-use grant. Data is for informational use; see the API terms. MIT licensed.