#!/usr/bin/env node
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 { ParaClient, ParaError } from './para-client.js';
import * as createWallet from './tools/create-wallet.js';
import * as getWallet from './tools/get-wallet.js';
import * as signRaw from './tools/sign-raw.js';
import * as listWallets from './tools/list-wallets.js';
import * as waitForWallet from './tools/wait-for-wallet.js';
// --- Fail fast if no API key ---
const PARA_API_KEY = process.env.PARA_API_KEY;
if (!PARA_API_KEY) {
console.error('PARA_API_KEY environment variable is required. Set it before starting the server.');
process.exit(1);
}
const client = new ParaClient({
apiKey: PARA_API_KEY,
baseUrl: process.env.PARA_REST_BASE_URL,
});
// --- Tool registry ---
const tools = [createWallet, getWallet, signRaw, listWallets, waitForWallet];
const toolMap = new Map(tools.map((t) => [t.definition.name, t]));
// --- MCP Server ---
const server = new Server({
name: 'para-wallet-mcp',
version: '1.0.0',
capabilities: {
tools: {},
},
});
server.setRequestHandler(ListToolsRequestSchema, async () => {
return {
tools: tools.map((t) => t.definition),
};
});
server.setRequestHandler(CallToolRequestSchema, async (request) => {
const { name, arguments: args } = request.params;
const tool = toolMap.get(name);
if (!tool) {
return {
content: [{ type: 'text', text: `Unknown tool: ${name}` }],
isError: true,
};
}
if (!args) {
return {
content: [{ type: 'text', text: `No arguments provided for tool: ${name}` }],
isError: true,
};
}
try {
return await tool.handler(client, args as Record<string, unknown>);
} catch (error) {
if (error instanceof ParaError) {
const hint = error.hint ? `\nHint: ${error.hint}` : '';
return {
content: [
{
type: 'text',
text: `Para API error (${error.status}): ${error.message}\nDetails: ${JSON.stringify(error.body)}${hint}`,
},
],
isError: true,
};
}
return {
content: [
{
type: 'text',
text: `Error executing ${name}: ${error instanceof Error ? error.message : String(error)}`,
},
],
isError: true,
};
}
});
// --- Start ---
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error('Para Wallet MCP server running on stdio');
}
main().catch((error) => {
console.error('Server error:', error);
process.exit(1);
});
