Scryfall MCP Server

Instructions

Implementation Reference

• index.ts:271-279 (handler)

  The handler function that implements the get_rulings tool logic. It constructs the Scryfall API URL for rulings by card ID, fetches the data, and processes the response using the shared helper.
  async function handleGetRulings(id: string) { // Scryfall docs: /cards/{id}/rulings // Also works with /cards/{oracle_id}/rulings const url = `https://api.scryfall.com/cards/${encodeURIComponent( id )}/rulings`; const response = await fetch(url); return handleScryfallResponse(response); }
• index.ts:135-151 (schema)

  The Tool object definition including name, description, and inputSchema for validating the 'id' parameter.
  const GET_RULINGS_TOOL: Tool = { name: "get_rulings", description: "Retrieve official rulings for a specified card by Scryfall ID or Oracle ID. " + "Returns an array of rulings. Each ruling has a 'published_at' date and a 'comment' field.", inputSchema: { type: "object", properties: { id: { type: "string", description: "A Scryfall ID or Oracle ID. Example: 'c09c71fb-7acb-4ffb-a47b-8961a0cf4990'" } }, required: ["id"] } };
• index.ts:186-194 (registration)

  The array of all tools that is returned by the listTools handler, registering get_rulings among them.
  const SCRYFALL_TOOLS = [ SEARCH_CARDS_TOOL, GET_CARD_BY_ID_TOOL, GET_CARD_BY_NAME_TOOL, RANDOM_CARD_TOOL, GET_RULINGS_TOOL, GET_PRICES_BY_ID_TOOL, GET_PRICES_BY_NAME_TOOL ] as const;
• index.ts:389-392 (registration)

  The switch case in the CallToolRequest handler that dispatches calls to 'get_rulings' to the handleGetRulings function.
  case "get_rulings": { const { id } = args as { id: string }; return await handleGetRulings(id); }
• index.ts:197-239 (helper)

  Shared helper function used by get_rulings (and other tools) to handle Scryfall API responses, including error parsing and JSON formatting.
  async function handleScryfallResponse(response: Response) { if (!response.ok) { // Attempt to parse Scryfall error let errorObj: ScryfallError | null = null; try { errorObj = (await response.json()) as ScryfallError; } catch { // fall back to generic } if (errorObj && errorObj.object === "error") { return { content: [ { type: "text", text: `Scryfall error: ${errorObj.details} (code=${errorObj.code}, status=${errorObj.status})` } ], isError: true }; } else { return { content: [ { type: "text", text: `HTTP error ${response.status}: ${response.statusText}` } ], isError: true }; } } // If okay, parse JSON const data = await response.json(); return { content: [ { type: "text", text: JSON.stringify(data, null, 2) } ], isError: false }; }