import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import minimist from 'minimist';
import { Resend } from 'resend';
import packageJson from './package.json' with { type: 'json' };
import {
addAudienceTools,
addBroadcastTools,
addContactTools,
addEmailTools,
} from './tools/index.js';
// Parse command line arguments
const argv = minimist(process.argv.slice(2));
// Get API key from command line argument or fall back to environment variable
const apiKey = argv.key || process.env.RESEND_API_KEY;
// Get sender email address from command line argument or fall back to environment variable
// Optional.
const senderEmailAddress = argv.sender || process.env.SENDER_EMAIL_ADDRESS;
// Get reply to email addresses from command line argument or fall back to environment variable
let replierEmailAddresses: string[] = [];
if (Array.isArray(argv['reply-to'])) {
replierEmailAddresses = argv['reply-to'];
} else if (typeof argv['reply-to'] === 'string') {
replierEmailAddresses = [argv['reply-to']];
} else if (process.env.REPLY_TO_EMAIL_ADDRESSES) {
replierEmailAddresses = process.env.REPLY_TO_EMAIL_ADDRESSES.split(',');
}
if (!apiKey) {
console.error(
'No API key provided. Please set RESEND_API_KEY environment variable or use --key argument',
);
process.exit(1);
}
const resend = new Resend(apiKey);
// Create server instance
const server = new McpServer({
name: 'email-sending-service',
version: packageJson.version,
});
addAudienceTools(server, resend);
addBroadcastTools(server, resend, {
senderEmailAddress,
replierEmailAddresses,
});
addContactTools(server, resend);
addEmailTools(server, resend, { senderEmailAddress, replierEmailAddresses });
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error('Email sending service MCP Server running on stdio');
}
main().catch((error) => {
console.error('Fatal error in main():', error);
process.exit(1);
});
