// server.ts
import * as fs from "fs";
import * as path from "path";
import { fileURLToPath } from "url";
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 { FoundryClient } from "./foundry-client.js";
import { createToolDefinitions, createToolHandler } from "./server-tools.js";
// Get the directory of this file to locate INSTRUCTIONS.md
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
// Read instructions from INSTRUCTIONS.md
function loadInstructions(): string {
try {
// Look for INSTRUCTIONS.md in the project root (one level up from build/)
const instructionsPath = path.join(__dirname, "..", "INSTRUCTIONS.md");
return fs.readFileSync(instructionsPath, "utf-8");
} catch (error) {
console.error("[FoundryMCP] Warning: Could not load INSTRUCTIONS.md:", error);
return "";
}
}
// Create the Foundry client instance
const foundryClient = new FoundryClient();
// Load instructions for MCP clients
const instructions = loadInstructions();
// Create server instance
const server = new Server(
{
name: "foundry-mcp",
version: "0.1.0",
instructions: instructions || undefined,
},
{
capabilities: {
tools: {},
},
}
);
// List available tools
server.setRequestHandler(ListToolsRequestSchema, async () => {
return { tools: createToolDefinitions() };
});
server.setRequestHandler(CallToolRequestSchema, createToolHandler(foundryClient));
// Start the server
async function main() {
// Connect to FoundryVTT first
console.error("Connecting to FoundryVTT...");
await foundryClient.connect();
console.error(`Connected to FoundryVTT at ${foundryClient.getHostname()}`);
// Start the MCP server
const transport = new StdioServerTransport();
await server.connect(transport);
console.error("FoundryVTT MCP server running on stdio");
}
main().catch((error) => {
console.error("Fatal error:", error);
process.exit(1);
});
