Cardrake

Use Cardrake in ChatGPT & Claude

Last updated on August 1, 2026.

AI assistants are confident about Pokemon card prices and frequently wrong about them. Prices move daily, variants get mixed up, and card numbers get invented. The Cardrake plugin fixes this: ChatGPT and Claude answer from Cardrake's card database instead of guessing.

What you can ask

Once connected, ask in plain language. A few things collectors ask every day:

  • "What's Umbreon ex from Prismatic Evolutions worth right now?"
  • "What are the most expensive Pokemon cards overall?"
  • "What card is 161/191?" — printed card numbers work
  • "Is my Charizard ex for their Pikachu ex a fair trade?"
  • "What's the Master Ball reverse price for Sewaddle from White Flare?"
  • "How many cards are in Surging Sparks?"

Every answer includes current TCGPlayer market prices for each printed variant — normal, holofoil, reverse holo, and pattern prints like Poke Ball and Master Ball reverses, which often trade at very different prices. Cards come with their Cardrake Chase Score, a 0–100 collectability rating, and a link to the full card page. In ChatGPT, results render as card images you can click through.

Add Cardrake to ChatGPT

  1. Open ChatGPT Settings → Plugins (or Apps & Connectors, depending on your version).
  2. Search for Cardrake in the directory and select it.
  3. There is no login step — the plugin needs no account. Start asking about cards.

If Cardrake doesn't appear in your directory yet, you can add it manually where custom MCP servers are supported: use the server URL https://www.cardrake.com/api/mcp with no authentication.

Add Cardrake to Claude

  1. In Claude.ai, open Settings → Connectors.
  2. Find Cardrake in the connectors directory, or choose Add custom connector and paste https://www.cardrake.com/api/mcp.
  3. No authentication is required. Ask away.

For Claude Code, one command does it: claude mcp add --transport http cardrake https://www.cardrake.com/api/mcp. The same endpoint works in any MCP-compatible client or agent framework.

Privacy and limits

The plugin is read-only and anonymous. Your assistant sends Cardrake only the lookup it needs — a search term or a card ID — never your conversation. Cardrake logs those requests with a pseudonymized client identifier to operate the service and prevent abuse; the full details are in our privacy policy. Requests are rate limited, so bulk scraping won't work, but normal collecting questions never come close to the limit.

Prices are market values for raw cards. Graded-card prices (PSA, BGS, CGC) are a different market and not included — the assistant is told this, so it should say so rather than guess.

Frequently asked questions

Is the Cardrake plugin free?

Yes. Free, and no Cardrake account needed. You only need whatever plan your assistant requires for plugins or connectors.

Can the plugin see my conversation?

No. Only the specific lookups the assistant chooses to send reach Cardrake. See the privacy policy for exactly what gets logged.

How current are the prices?

TCGPlayer market values, synced daily, quoted per variant. A Master Ball reverse holo is priced separately from the plain reverse holo because the market treats them as different cards.

Can it update my collection or wishlist?

Not yet — the plugin can't touch accounts. Account linking is planned, so you'll eventually be able to ask "what am I missing from Twilight Masquerade?". Until then, collection tracking lives in the Cardrake portfolio.

What is the Cardrake Chase Score?

A 0–100 rating of how chased a card is, with S/A/B/C/Bulk tiers. It blends rarity, price rank within the set, market value, and 30-day momentum; high-profile cards carry editorial notes from the Cardrake team. The same score appears on every card page on this site.

Which assistants are supported?

ChatGPT (with card widgets), Claude, Claude Code, Claude Desktop, and any MCP-compatible client via https://www.cardrake.com/api/mcp.

For developers and agents

Cardrake publishes machine-readable descriptions of everything above, so an agent can discover the API without being handed a URL. Start at the API catalogue (RFC 9727) — it links to the rest.

No key, no registration, no OAuth: every endpoint listed here is public and anonymous. The short answer to “how do I authenticate?” is that you don't, and /auth.md says so at length so no one builds a registration flow that doesn't exist.

Where the plugin ends and Cardrake begins

The plugin answers questions; building a collection takes more than answers. When you're ready to plan a Pokemon master set, lay out binder pages, print a checklist, and track what you own across expansions, that's what the Cardrake binder planner is for — every card the assistant shows you links straight to it.