@pokemontcgapi/mcp

An MCP server for the Pokémon TCG API at pokemontcgapi.com. It gives an agent eight tools over a catalogue of 615 sets and 52,337 cards — 379 Japanese sets, 176 international, 60 Simplified Chinese — with card names in six languages, illustrators, images, and prices that carry their source, basis, grade and sample size.

Unofficial. Not produced, endorsed, supported by or affiliated with Nintendo, Creatures Inc., GAME FREAK inc. or The Pokémon Company International. Pokémon and all related marks are trademarks of their respective owners.

Install

Claude Code:

claude mcp add pokemontcgapi --env PTCG_API_KEY=your-key -- npx -y @pokemontcgapi/mcp

Claude Desktop — claude_desktop_config.json:

{
  "mcpServers": {
    "pokemontcgapi": {
      "command": "npx",
      "args": ["-y", "@pokemontcgapi/mcp"],
      "env": { "PTCG_API_KEY": "your-key" }
    }
  }
}

Cursor — .cursor/mcp.json:

{
  "mcpServers": {
    "pokemontcgapi": {
      "command": "npx",
      "args": ["-y", "@pokemontcgapi/mcp"],
      "env": { "PTCG_API_KEY": "${env:PTCG_API_KEY}" }
    }
  }
}

VS Code — .vscode/mcp.json. Note the top-level key is servers, not mcpServers, and inputs keeps the key out of the committed file:

{
  "inputs": [
    { "id": "ptcg-key", "type": "promptString", "description": "pokemontcgapi key", "password": true }
  ],
  "servers": {
    "pokemontcgapi": {
      "command": "npx",
      "args": ["-y", "@pokemontcgapi/mcp"],
      "env": { "PTCG_API_KEY": "${input:ptcg-key}" }
    }
  }
}

Environment: PTCG_API_KEY (optional today), PTCG_BASE_URL (defaults to https://api.pokemontcgapi.com). Node ≥ 20.

The tools

Eight tools, not one per endpoint. tools/list sits in the model's context on every turn, so the whole surface is just over 9 KB, and each tool is shaped like a question rather than like a route — the model does not have to chain four calls to answer one thing.

Tool	Answers
ptcg_search_cards	"Charizard cards from Japanese sets", by name, set, region, rarity, artist or release window
ptcg_get_cards	Up to 100 ids in one call; base1-4 and bs-4 both resolve
ptcg_get_card_prices	Every current observation for a card, with printing, grade, as_of and sample_n
ptcg_list_sets	"Every Japanese set released in 2024"
ptcg_get_reference	The exact strings for types, supertypes and rarities, so filters are not guessed
ptcg_list_artists	Illustrators and how many cards each drew
ptcg_get_catalogue_status	What the catalogue does and does not contain, measured live
ptcg_identify_card_from_image	"Which card is this a photo of?" — ranked candidates, and an explicit refusal when reprints share the artwork. 25 credits a call

Every tool is annotated readOnlyHint: true and destructiveHint: false. Nothing here writes. ptcg_identify_card_from_image is the one marked idempotentHint: false, because the same photo costs 25 credits every time it is sent — a client must not retry it on its own.

What this API does not have

The last tool exists because of this section, and it returns these facts from a live call rather than leaving a model to infer them:

• No Korean cards. Zero KR sets and zero ko translations. The print region and the locale are modelled in the schema and carry no data, so filtering on them returns an empty result, not an error.
• Card game text is English, and uneven. attacks, abilities, weaknesses, resistances, subtypes, retreat_cost, rules and flavor_text carry rows since 3 September 2026, on the 20,725 Western printings — attacks on 33% of the whole catalogue and 83% of the Western part, subtypes on 38%, abilities on 8%. Japanese and Chinese printings carry none, so a null attacks means we do not hold it, never that the card has no attack.
• No format legalities. legalities is empty for every card, and level with it. If the question is about deck legality, this API cannot answer it.

Both statements are measured, dated in the source, and repeated verbatim in the tool descriptions — so an agent is told before it calls, not after.

Reading prices correctly

There is no printing filter. First Edition, Unlimited, holofoil, reverse holofoil and graded rows all come back together, so read printing, condition and grading on each row rather than taking the first number. basis separates GUIDE (published upstream) from DERIVED (computed by us); PTCG_INDEX is our own composite in EUR and carries sample_n. Every observation has an as_of date and is delayed by at least a day — never quote a price without it.

Context discipline

Results are capped at 50 rows regardless of what the API allows, sent as aligned tables rather than JSON (about 40% fewer tokens, and models misread them less often), with a compact field projection. Truncation is always announced along with the cursor to continue. Price rows are the one thing never truncated.

Protocol

Built on @modelcontextprotocol/server v2, which negotiates the 2025-11-25 revision and accepts clients down to 2024-10-07. stdio transport.

The revision is the library's, not a claim of our own: SUPPORTED_PROTOCOL_VERSIONS in @modelcontextprotocol/server@2.0.0 tops out at 2025-11-25, so a client that asks for anything newer is answered with that. Verified against the published package, not read off a changelog.

Also available

• TypeScript SDK, zero runtime dependencies: @pokemontcgapi/sdk — source
• Docs: https://pokemontcgapi.com/docs
• Coverage, measured live: https://pokemontcgapi.com/coverage

Build from source

npm ci
npm run typecheck
npm run build

Node >= 20. No test suite lives here yet: what CI enforces is that the package typechecks and builds on both Node 20 and Node 22, and that npm pack produces the file list the registry is meant to receive.

This package is developed inside the private monorepo that runs pokemontcgapi.com and mirrored here on each release, so a merged pull request travels back by hand rather than by merge button. That is not a reason to send patches elsewhere — open the issue or the PR here, it is the address that gets read.

Licence

MIT. Data served by the API carries per-source redistribution terms — see https://pokemontcgapi.com/legal/attribution.