Figma MCP Server

Instructions

Implementation Reference

• index.ts:115-136 (schema)

  Defines the Tool object for reply_to_comment, including name, description, and input schema.
  const REPLY_TO_COMMENT: Tool = { name: "reply_to_comment", description: "Reply to an existing comment in a Figma file", inputSchema: { type: "object", properties: { file_key: { type: "string", description: "The key of the Figma file", }, comment_id: { type: "string", description: "The ID of the comment to reply to. Comment ids have the format `<number>`", }, message: { type: "string", description: "The reply message", }, }, required: ["file_key", "comment_id", "message"], }, };
• index.ts:138-140 (registration)

  Registers the reply_to_comment tool (as REPLY_TO_COMMENT) in the list of available tools returned by listTools.
  server.setRequestHandler(ListToolsRequestSchema, async () => ({ tools: [ADD_FIGMA_FILE, VIEW_NODE, READ_COMMENTS, POST_COMMENT, REPLY_TO_COMMENT], }));
• index.ts:247-261 (handler)

  The main handler function that executes the tool logic: calls the Figma API helper and formats the response.
  async function doReplyToComment( fileKey: string, commentId: string, message: string ): Promise<CallToolResult> { const data = await replyToComment(fileKey, commentId, message); return { content: [ { type: "text", text: JSON.stringify(data, null, 2), }, ], }; }
• index.ts:291-298 (registration)

  Dispatch logic in callToolRequest handler that routes requests for reply_to_comment to the doReplyToComment function.
  if (request.params.name === "reply_to_comment") { const input = request.params.arguments as { file_key: string; comment_id: string; message: string; }; return doReplyToComment(input.file_key, input.comment_id, input.message); }
• figma_api.ts:133-148 (helper)

  Core helper function that performs the HTTP POST request to the Figma API to reply to a comment.
  export async function replyToComment(fileKey: string, commentId: string, message: string) { const response = await axios.post( `https://api.figma.com/v1/files/${fileKey}/comments`, { message, comment_id: commentId, }, { headers: { "X-FIGMA-TOKEN": getFigmaApiKey(), "Content-Type": "application/json", }, } ); return response.data; }