Cursor Talk to Figma MCP

Instructions

Input Schema

Input Schema (JSON Schema)

Implementation Reference

• src/cursor_mcp_plugin/code.js:1065-1114 (handler)

  The core handler function that executes the corner radius modification logic in the Figma plugin. It retrieves the node, validates support for cornerRadius, and sets uniform or individual corner radii based on parameters.
  async function setCornerRadius(params) { const { nodeId, radius, corners } = params || {}; if (!nodeId) { throw new Error("Missing nodeId parameter"); } if (radius === undefined) { throw new Error("Missing radius parameter"); } const node = await figma.getNodeByIdAsync(nodeId); if (!node) { throw new Error(`Node not found with ID: ${nodeId}`); } // Check if node supports corner radius if (!("cornerRadius" in node)) { throw new Error(`Node does not support corner radius: ${nodeId}`); } // If corners array is provided, set individual corner radii if (corners && Array.isArray(corners) && corners.length === 4) { if ("topLeftRadius" in node) { // Node supports individual corner radii if (corners[0]) node.topLeftRadius = radius; if (corners[1]) node.topRightRadius = radius; if (corners[2]) node.bottomRightRadius = radius; if (corners[3]) node.bottomLeftRadius = radius; } else { // Node only supports uniform corner radius node.cornerRadius = radius; } } else { // Set uniform corner radius node.cornerRadius = radius; } return { id: node.id, name: node.name, cornerRadius: "cornerRadius" in node ? node.cornerRadius : undefined, topLeftRadius: "topLeftRadius" in node ? node.topLeftRadius : undefined, topRightRadius: "topRightRadius" in node ? node.topRightRadius : undefined, bottomRightRadius: "bottomRightRadius" in node ? node.bottomRightRadius : undefined, bottomLeftRadius: "bottomLeftRadius" in node ? node.bottomLeftRadius : undefined, }; }
• src/talk_to_figma_mcp/server.ts:1213-1255 (registration)

  MCP tool registration including schema (Zod input validation) and handler proxy that forwards the command to the Figma plugin via WebSocket.
  server.tool( "set_corner_radius", "Set the corner radius of a node in Figma", { nodeId: z.string().describe("The ID of the node to modify"), radius: z.number().min(0).describe("Corner radius value"), corners: z .array(z.boolean()) .length(4) .optional() .describe( "Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft]" ), }, async ({ nodeId, radius, corners }) => { try { const result = await sendCommandToFigma("set_corner_radius", { nodeId, radius, corners: corners || [true, true, true, true], }); const typedResult = result as { name: string }; return { content: [ { type: "text", text: `Set corner radius of node "${typedResult.name}" to ${radius}px`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error setting corner radius: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } } );
• src/talk_to_figma_mcp/server.ts:1216-1226 (schema)

  Input schema definition using Zod for validating nodeId (string), radius (non-negative number), and optional corners (array of 4 booleans).
  { nodeId: z.string().describe("The ID of the node to modify"), radius: z.number().min(0).describe("Corner radius value"), corners: z .array(z.boolean()) .length(4) .optional() .describe( "Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft]" ), },
• src/cursor_mcp_plugin/code.js:301-336 (helper)

  Helper function filterFigmaNode includes cornerRadius in the filtered node representation for export.
  if (node.cornerRadius !== undefined) { filtered.cornerRadius = node.cornerRadius; } if (node.absoluteBoundingBox) { filtered.absoluteBoundingBox = node.absoluteBoundingBox; } if (node.characters) { filtered.characters = node.characters; } if (node.style) { filtered.style = { fontFamily: node.style.fontFamily, fontStyle: node.style.fontStyle, fontWeight: node.style.fontWeight, fontSize: node.style.fontSize, textAlignHorizontal: node.style.textAlignHorizontal, letterSpacing: node.style.letterSpacing, lineHeightPx: node.style.lineHeightPx, }; } if (node.children) { filtered.children = node.children .map((child) => { return filterFigmaNode(child); }) .filter((child) => { return child !== null; }); } return filtered; }
• src/talk_to_figma_mcp/server.ts:258-289 (helper)

  Helper function filterFigmaNode (server-side) includes cornerRadius in the filtered node representation.
  if (node.cornerRadius !== undefined) { filtered.cornerRadius = node.cornerRadius; } if (node.absoluteBoundingBox) { filtered.absoluteBoundingBox = node.absoluteBoundingBox; } if (node.characters) { filtered.characters = node.characters; } if (node.style) { filtered.style = { fontFamily: node.style.fontFamily, fontStyle: node.style.fontStyle, fontWeight: node.style.fontWeight, fontSize: node.style.fontSize, textAlignHorizontal: node.style.textAlignHorizontal, letterSpacing: node.style.letterSpacing, lineHeightPx: node.style.lineHeightPx }; } if (node.children) { filtered.children = node.children .map((child: any) => filterFigmaNode(child)) .filter((child: any) => child !== null); // Remove null children (VECTOR nodes) } return filtered; }