ChatGPT plugin
Tournament deck comparison inside ChatGPT.
cEDH Deck Compare exposes a read-only MCP server for ChatGPT and Codex. It returns parsed deck facts, exact same-commander TopDeck tournament records, exact card-presence differences, and Scryfall card identity or legality.
Availability
Developer preview
The production server is live, but a public listing in the ChatGPT and Codex Plugins Directory is not yet available. Developers can connect the universal MCP endpoint at https://cedhdiff.com/mcp for testing.
Example prompts
Ask for facts you can verify.
- Parse this decklist and show only card counts, commander identity, and parser warnings.
- Find recent TopDeck tournament lists with exactly the same commander as this deck.
- Compare my list with one returned tournament list and show shared, tournament-only, and current-list-only cards.
- Look up these cards on Scryfall and show Commander legality and source links.
Boundaries
No grades or invented advice.
The plugin does not estimate win rates, assign power levels, grade a deck, recommend additions or cuts, or replace an exact commander match with a vaguely similar strategy. Provider names and source links remain attached to returned evidence.