Advanced Trello MCP Server

Implementation Reference

• src/tools/labels.ts:214-255 (handler)

  The handler function for the 'get-label' tool. It retrieves a specific Trello label by its ID using the Trello API, with optional fields parameter, handles credentials check, makes a GET request, and returns the JSON data or error.

  async ({ labelId, fields }) => {
  	try {
  		if (!credentials.apiKey || !credentials.apiToken) {
  			return {
  				content: [
  					{
  						type: 'text',
  						text: 'Trello API credentials are not configured',
  					},
  				],
  				isError: true,
  			};
  		}
  
  		const url = new URL(`https://api.trello.com/1/labels/${labelId}`);
  		url.searchParams.append('key', credentials.apiKey);
  		url.searchParams.append('token', credentials.apiToken);
  		if (fields) url.searchParams.append('fields', fields);
  
  		const response = await fetch(url.toString());
  		const data = await response.json();
  
  		return {
  			content: [
  				{
  					type: 'text',
  					text: JSON.stringify(data),
  				},
  			],
  		};
  	} catch (error) {
  		return {
  			content: [
  				{
  					type: 'text',
  					text: `Error getting label: ${error}`,
  				},
  			],
  			isError: true,
  		};
  	}
  }

• src/tools/labels.ts:210-213 (schema)

  Zod input schema for 'get-label' tool: labelId (string, required), fields (string, optional).

  {
  	labelId: z.string().describe('ID of the label to retrieve'),
  	fields: z.string().optional().describe('Comma-separated list of fields to include')
  },

• src/tools/labels.ts:208-256 (registration)

  Registration of the 'get-label' tool using server.tool(), including the tool name, schema, and handler function.

  server.tool(
  	'get-label',
  	{
  		labelId: z.string().describe('ID of the label to retrieve'),
  		fields: z.string().optional().describe('Comma-separated list of fields to include')
  	},
  	async ({ labelId, fields }) => {
  		try {
  			if (!credentials.apiKey || !credentials.apiToken) {
  				return {
  					content: [
  						{
  							type: 'text',
  							text: 'Trello API credentials are not configured',
  						},
  					],
  					isError: true,
  				};
  			}
  
  			const url = new URL(`https://api.trello.com/1/labels/${labelId}`);
  			url.searchParams.append('key', credentials.apiKey);
  			url.searchParams.append('token', credentials.apiToken);
  			if (fields) url.searchParams.append('fields', fields);
  
  			const response = await fetch(url.toString());
  			const data = await response.json();
  
  			return {
  				content: [
  					{
  						type: 'text',
  						text: JSON.stringify(data),
  					},
  				],
  			};
  		} catch (error) {
  			return {
  				content: [
  					{
  						type: 'text',
  						text: `Error getting label: ${error}`,
  					},
  				],
  				isError: true,
  			};
  		}
  	}
  );