MongoDB Storage for MCP Servers
Learn how to implement MongoDB storage integration for Model Context Protocol servers
MongoDB Storage Integration for MCP
Overview
MongoDB provides a flexible document-based storage solution for MCP servers, particularly well-suited for storing model contexts and related metadata. This guide covers implementing MongoDB as a storage provider for your MCP server.
Prerequisites
- MongoDB 6.0 or higher
- Node.js 18 or higher
- MCP server base implementation
- MongoDB Compass (optional, for visualization)
Implementation
// filepath: /path/to/MongoDBStorage.ts
import { MongoClient, Collection } from 'mongodb';
interface ContextDocument {
_id: string;
data: Buffer;
metadata?: Record<string, any>;
createdAt: Date;
updatedAt: Date;
}
class MongoDBStorage implements MCPStorageProvider {
private collection: Collection<ContextDocument>;
constructor(uri: string, dbName: string) {
const client = new MongoClient(uri);
this.collection = client.db(dbName).collection('contexts');
}
async initialize(): Promise<void> {
await this.collection.createIndex({ _id: 1 });
await this.collection.createIndex({ updatedAt: 1 });
}
async storeContext(contextId: string, data: Buffer): Promise<void> {
await this.collection.updateOne(
{ _id: contextId },
{
$set: {
data,
updatedAt: new Date()
},
$setOnInsert: {
createdAt: new Date()
}
},
{ upsert: true }
);
}
async retrieveContext(contextId: string): Promise<Buffer> {
const doc = await this.collection.findOne({ _id: contextId });
if (!doc) {
throw new Error('Context not found');
}
return doc.data;
}
}
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