#!/usr/bin/env node
import { Server } from '@modelcontextprotocol/sdk/server/index.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import {
CallToolRequestSchema,
ErrorCode,
ListToolsRequestSchema,
McpError,
} from '@modelcontextprotocol/sdk/types.js';
import { LoadMidiFileTool } from './tools/loadMidiFile.js';
import { GetMidiSummaryTool } from './tools/getMidiSummary.js';
import { GetTracksListTool } from './tools/getTracksList.js';
import { GetTrackDetailsTool } from './tools/getTrackDetails.js';
import { GetMidiEventsTool } from './tools/getMidiEvents.js';
class MidiAnalyzerServer {
private server: Server;
constructor() {
this.server = new Server(
{
name: 'midi-analyzer-mcp',
version: '1.0.0',
},
{
capabilities: {
tools: {},
},
}
);
this.setupToolHandlers();
this.setupErrorHandling();
}
private setupToolHandlers(): void {
// List tools handler
this.server.setRequestHandler(ListToolsRequestSchema, async () => {
return {
tools: [
LoadMidiFileTool.definition,
GetMidiSummaryTool.definition,
GetTracksListTool.definition,
GetTrackDetailsTool.definition,
GetMidiEventsTool.definition,
],
};
});
// Call tool handler
this.server.setRequestHandler(CallToolRequestSchema, async (request) => {
const { name, arguments: args } = request.params;
try {
switch (name) {
case 'load_midi_file':
return {
content: [
{
type: 'text',
text: JSON.stringify(await LoadMidiFileTool.execute(args as any), null, 2),
},
],
};
case 'get_midi_summary':
return {
content: [
{
type: 'text',
text: JSON.stringify(await GetMidiSummaryTool.execute(args as any), null, 2),
},
],
};
case 'get_tracks_list':
return {
content: [
{
type: 'text',
text: JSON.stringify(await GetTracksListTool.execute(args as any), null, 2),
},
],
};
case 'get_track_details':
return {
content: [
{
type: 'text',
text: JSON.stringify(await GetTrackDetailsTool.execute(args as any), null, 2),
},
],
};
case 'get_midi_events':
return {
content: [
{
type: 'text',
text: JSON.stringify(await GetMidiEventsTool.execute(args as any), null, 2),
},
],
};
default:
throw new McpError(
ErrorCode.MethodNotFound,
`Unknown tool: ${name}`
);
}
} catch (error) {
const errorMessage = error instanceof Error ? error.message : 'Unknown error occurred';
throw new McpError(
ErrorCode.InternalError,
`Error executing tool ${name}: ${errorMessage}`
);
}
});
}
private setupErrorHandling(): void {
this.server.onerror = (error) => {
console.error('[MCP Error]', error);
};
process.on('SIGINT', async () => {
await this.server.close();
process.exit(0);
});
}
async run(): Promise<void> {
const transport = new StdioServerTransport();
await this.server.connect(transport);
console.error('MIDI Analyzer MCP server running on stdio');
}
}
// Start the server
const server = new MidiAnalyzerServer();
server.run().catch((error) => {
console.error('Failed to start server:', error);
process.exit(1);
});
