MCP Vision Relay

import { Server } from "@modelcontextprotocol/sdk/server/index.js"; import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js"; import { CallToolRequestSchema, ListToolsRequestSchema, } from "@modelcontextprotocol/sdk/types.js"; import type { CallToolRequest, CallToolResult, ListToolsRequest, Tool, } from "@modelcontextprotocol/sdk/types.js"; import { appConfig } from "../config/index.js"; import { listTools, runTool } from "../tools/index.js"; const server = new Server( { name: "mcp-vision-relay", version: "0.1.0", }, { capabilities: { tools: {}, }, } ); server.setRequestHandler( ListToolsRequestSchema, async (_request: ListToolsRequest): Promise<{ tools: Tool[] }> => { return { tools: listTools() as Tool[] }; } ); server.setRequestHandler( CallToolRequestSchema, async (request: CallToolRequest): Promise<CallToolResult> => { const toolName = request.params.name; const args = request.params.arguments ?? {}; try { return await runTool(toolName, args); } catch (error) { const message = error instanceof Error ? error.message : JSON.stringify(error); return { content: [ { type: "text", text: `Failed to execute tool "${toolName}": ${message}`, }, ], isError: true, }; } } ); export async function startServer(): Promise<void> { console.error( `[mcp-vision-relay] Starting server (tempDir=${appConfig.tempDir})` ); const transport = new StdioServerTransport(); await server.connect(transport); console.error("[mcp-vision-relay] Listening on stdio"); } export async function run(): Promise<void> { try { await startServer(); } catch (error) { console.error("[mcp-vision-relay] Fatal error", error); process.exit(1); } }