mongo-create-document

Insert JSON documents into MongoDB collections using this MCP server tool. Specify database, collection, and document data to create new records in your MongoDB database.

Instructions

Create a new document in a MongoDB collection

Input Schema

TableJSON Schema

Name	Required	Description
`database`	Yes	Database name
`collection`	Yes	Collection name
`document`	Yes	Document to insert as JSON object

Implementation Reference

src/index.ts:110-128 (handler)

Handler function that connects to the MongoDB database, retrieves the collection, inserts the document using insertOne, and returns success message with inserted ID.

async ({ database: dbName, collection: collectionName, document }) => {
  try {
    const db = await ensureConnection(dbName);
    const collection: Collection = db.collection(collectionName);
    
    const result = await collection.insertOne(document);
    
    return {
      content: [
        {
          type: "text",
          text: `Document created successfully with ID: ${result.insertedId}`,
        },
      ],
    };
  } catch (error) {
    throw new Error(`Failed to create document: ${error instanceof Error ? error.message : 'Unknown error'}`);
  }
}

src/index.ts:105-109 (schema)

Zod schema defining input parameters: database, collection, and document.

{
  database: z.string().describe("Database name"),
  collection: z.string().describe("Collection name"),
  document: z.record(z.any()).describe("Document to insert as JSON object"),
},

src/index.ts:102-129 (registration)

Full registration of the mongo-create-document tool using McpServer.tool(), including name, description, schema, and inline handler.

server.tool(
  "mongo-create-document",
  "Create a new document in a MongoDB collection",
  {
    database: z.string().describe("Database name"),
    collection: z.string().describe("Collection name"),
    document: z.record(z.any()).describe("Document to insert as JSON object"),
  },
  async ({ database: dbName, collection: collectionName, document }) => {
    try {
      const db = await ensureConnection(dbName);
      const collection: Collection = db.collection(collectionName);
      
      const result = await collection.insertOne(document);
      
      return {
        content: [
          {
            type: "text",
            text: `Document created successfully with ID: ${result.insertedId}`,
          },
        ],
      };
    } catch (error) {
      throw new Error(`Failed to create document: ${error instanceof Error ? error.message : 'Unknown error'}`);
    }
  }
);

src/index.ts:88-100 (helper)

Helper function to ensure MongoDB client connection and retrieve or cache the database instance.

async function ensureConnection(dbName: string): Promise<Db> {
  if (!mongoClient) {
    const uri = getMongoUri();
    mongoClient = new MongoClient(uri);
    await mongoClient.connect();
  }
  
  if (!databases.has(dbName)) {
    databases.set(dbName, mongoClient.db(dbName));
  }
  
  return databases.get(dbName)!;
}

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