Your ChatGPT Magic collection: ask about the cards you own

Updated November 9, 2026

ChatGPT can answer from your own Magic collection once Reliquary is added to it as a custom MCP server: your cards, places and decks live in Reliquary, and ChatGPT reads and changes them through Reliquary's tools.

How it fits together

OpenAI's developer documentation describes adding a remote MCP server to ChatGPT, and says ChatGPT asks for confirmation in a conversation before a write action. Reliquary marks each of its tools as reading, writing or destructive, the hints MCP clients read. The steps for Reliquary are on Connect your assistant.

What you can ask

Question	What comes back
Where is my copy of a card?	The place it is in, then every deck that claims it
What can I trade with @name?	What you could send, what you could get, and the gap in value
What is my collection worth?	A total, with proxies left out unless you ask
Make me a buylist for this deck	Missing cards with their cheapest printing, and how many have no price

Where the chat can draw one, some answers come as a card with pictures; the same answer is always in the text too, so a shared copy or a proxy is never shown only by a colour.

What stays true in every answer

A copy two decks use is called shared, with the other decks and where the card physically is.
A proxy is named, and never counted as a real card you own.
What a tool left out is said: names it could not read, cards with no price.

Questions

Which ChatGPT plans can add a custom MCP server?

OpenAI's pages decide which plans can add one, and they change; this page does not repeat them.

How do I find Reliquary in ChatGPT?

You add Reliquary yourself, by its address, as Connect your assistant shows.

Can ChatGPT delete my cards?

Not without your yes. Removing a stack, deleting a deck and releasing all of a deck's claims first answer with what would happen. A deleted deck never deletes cards: the ones sleeved in it return to Unsorted.

Connect your assistantFree, with Google or GitHub. No card.

Sources

OpenAI for developers, MCP, read November 9, 2026
Model Context Protocol, What is the Model Context Protocol (MCP)?, read November 9, 2026

MTG collection MCP server: your cards in any assistantReliquary is an MCP server for your Magic: The Gathering collection. Connect an assistant and ask where a card is, what a deck misses, what to buy.

A Claude Magic: The Gathering connector for your own cardsAdd Reliquary to Claude as a custom connector and ask about your own Magic: The Gathering cards: where each copy is, what a deck misses, what to buy.

MTG trade matching: what you can send and get, both sides at onceReliquary matches a trade with another Magic player from the lists they published: what you could send, what you could get, and the gap in value, proxies named.

How to export from ManaBox: your collection and decksExport your ManaBox collection, a binder or a list as a CSV file, or a deck as text, and import it into Reliquary with each binder as its own place.