set_corner_radius
Adjust corner radius values for Figma design elements to create rounded edges or modify existing curvature.
Instructions
Set the corner radius of a node in Figma
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| nodeId | Yes | The ID of the node to modify | |
| radius | Yes | Corner radius value | |
| corners | No | Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft] |
Implementation Reference
- src/cursor_mcp_plugin/code.js:1065-1114 (handler)Core handler function that executes the set_corner_radius logic using Figma API. Retrieves the node by ID, validates support for cornerRadius, and sets uniform radius or individual corner radii based on the 'corners' parameter.
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: ${nodeId}`); } // If corners array is provided, set individual corner radii if (corners && Array.isArray(corners) && corners.length === 4) { if ("topLeftRadius" in node) { // Node supports individual corner radii if (corners[0]) node.topLeftRadius = radius; if (corners[1]) node.topRightRadius = radius; if (corners[2]) node.bottomRightRadius = radius; if (corners[3]) node.bottomLeftRadius = radius; } else { // Node only supports uniform corner radius node.cornerRadius = radius; } } else { // Set uniform corner radius node.cornerRadius = radius; } return { id: node.id, name: node.name, cornerRadius: "cornerRadius" in node ? node.cornerRadius : undefined, topLeftRadius: "topLeftRadius" in node ? node.topLeftRadius : undefined, topRightRadius: "topRightRadius" in node ? node.topRightRadius : undefined, bottomRightRadius: "bottomRightRadius" in node ? node.bottomRightRadius : undefined, bottomLeftRadius: "bottomLeftRadius" in node ? node.bottomLeftRadius : undefined, }; } - src/talk_to_figma_mcp/server.ts:1213-1255 (registration)MCP tool registration for 'set_corner_radius', including Zod input schema (nodeId: string, radius: number >=0, optional corners: boolean[4]) and handler that proxies the command to the Figma plugin via sendCommandToFigma.
server.tool( "set_corner_radius", "Set the corner radius of a node in Figma", { nodeId: z.string().describe("The ID of the node to modify"), radius: z.number().min(0).describe("Corner radius value"), corners: z .array(z.boolean()) .length(4) .optional() .describe( "Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft]" ), }, async ({ nodeId, radius, corners }) => { try { const result = await sendCommandToFigma("set_corner_radius", { nodeId, radius, corners: corners || [true, true, true, true], }); const typedResult = result as { name: string }; return { content: [ { type: "text", text: `Set corner radius of node "${typedResult.name}" to ${radius}px`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error setting corner radius: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } } ); - src/cursor_mcp_plugin/code.js:151-152 (handler)Dispatch handler in the Figma plugin's command router that calls the setCornerRadius implementation.
case "set_corner_radius": return await setCornerRadius(params); - Helper function filterFigmaNode extracts and includes cornerRadius when serializing node data for MCP responses.
if (node.cornerRadius !== undefined) { filtered.cornerRadius = node.cornerRadius; }