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MCP API reference

The @agenite/mcp package provides a client implementation for the Model Context Protocol (MCP), enabling Agenite agents to access external data sources and tools through a standardized interface.

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MCPClient

The main class for interacting with MCP servers.

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Constructor

constructor(config: {
  mcpServers: {
    [name: string]: MCPServerConfig;
  };
  name?: string;
  version?: string;
})

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Parameters

ParameterTypeDescription
config.mcpServers{ [name: string]: MCPServerConfig }Configuration for MCP servers
config.namestringOptional client name (defaults to ‘mcp-client’)
config.versionstringOptional client version (defaults to ‘1.0.0’)

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Example

const mcpClient = new MCPClient({
  name: 'my-client',
  version: '1.0.0',
  mcpServers: {
    fetch: {
      url: 'https://router.mcp.so/sse/your-server-id',
    },
    filesystem: {
      command: 'npx',
      args: ['-y', '@modelcontextprotocol/server-filesystem', './data'],
    },
  },
});

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Methods

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getTools

Retrieves tools from a specific MCP server. 
async getTools(serverName: string): Promise<Tool[]>
ParameterTypeDescription
serverNamestringName of the server to get tools from
Returns: A promise that resolves to an array of Tool instances.

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getAllTools

Retrieves tools from all connected MCP servers as a flat array. 
async getAllTools(): Promise<Tool[]>
Returns: A promise that resolves to an array of Tool instances from all servers.

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getAllToolsByServer

Retrieves tools from all connected MCP servers, organized by server. 
async getAllToolsByServer(): Promise<{[serverName: string]: Tool[]}>
Returns: A promise that resolves to an object mapping server names to arrays of Tool instances.

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getServerNames

Returns the names of all configured servers. 
getServerNames(): string[]
Returns: An array of server name strings.

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Interfaces

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MCPServerConfig

Represents the configuration for an MCP server. This is a union type of MCPSSEConfig and MCPStdioConfig. 
type MCPServerConfig = MCPSSEConfig | MCPStdioConfig;

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MCPSSEConfig

Configuration for connecting to an MCP server via Server-Sent Events (SSE). 
interface MCPSSEConfig {
  /**
   * URL for SSE transport
   */
  url: string;
}

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MCPStdioConfig

Configuration for launching and connecting to an MCP server as a local process via standard I/O. 
interface MCPStdioConfig {
  /**
   * Command to execute the MCP server
   */
  command: string;

  /**
   * Arguments for the command
   */
  args?: string[];

  /**
   * Environment variables for the command
   */
  env?: Record<string, string>;

  /**
   * Working directory for the command
   */
  cwd?: string;
}

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MCPToolCallResult

Represents the result of a tool call from an MCP server. 
interface MCPToolCallResult {
  /**
   * Whether the call resulted in an error
   */
  isError: boolean;

  /**
   * Data returned from the tool call
   */
  data: string;
}

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Usage examples

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Basic usage

import { MCPClient } from '@agenite/mcp';
import { Agent } from '@agenite/agent';

// Create an MCP client
const mcpClient = new MCPClient({
  mcpServers: {
    fetch: {
      url: 'https://router.mcp.so/sse/your-server-id',
    },
  },
});

// Get all tools from all servers
const tools = await mcpClient.getAllTools();

// Use tools in an agent
const agent = new Agent({
  // ...agent configuration
  tools: tools,
});

// Execute the agent
const result = await agent.execute({
  messages: [/* messages */],
});

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Using multiple servers

const mcpClient = new MCPClient({
  mcpServers: {
    fetch: {
      url: 'https://router.mcp.so/sse/fetch-server-id',
    },
    filesystem: {
      command: 'npx',
      args: ['-y', '@modelcontextprotocol/server-filesystem', './data'],
    },
    sqlite: {
      command: 'npx',
      args: ['-y', '@modelcontextprotocol/server-sqlite', './database.db'],
    },
  },
});

// Get tools by server
const toolsByServer = await mcpClient.getAllToolsByServer();

// Get only tools from specific servers
const fetchTools = toolsByServer['fetch'] || [];
const filesystemTools = toolsByServer['filesystem'] || [];

console.log(`Fetch tools: ${fetchTools.length}`);
console.log(`Filesystem tools: ${filesystemTools.length}`);

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Getting server names

const mcpClient = new MCPClient({
  mcpServers: {
    fetch: { url: 'https://router.mcp.so/sse/fetch-server-id' },
    filesystem: { command: 'npx', args: ['-y', '@modelcontextprotocol/server-filesystem', './data'] },
  },
});

// Get all configured server names
const serverNames = mcpClient.getServerNames();
console.log(`Configured servers: ${serverNames.join(', ')}`);

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Integration with Agenite

The tools returned by the MCP client are standard @agenite/tool instances and can be used directly with any Agenite agent: 
import { MCPClient } from '@agenite/mcp';
import { Agent } from '@agenite/agent';
import { OllamaProvider } from '@agenite/ollama';

// Create MCP client and get tools
const mcpClient = new MCPClient({
  mcpServers: {
    fetch: { url: 'https://router.mcp.so/sse/fetch-server-id' },
  },
});
const mcpTools = await mcpClient.getAllTools();

// Create an agent with MCP tools
const agent = new Agent({
  name: 'web-research-agent',
  provider: new OllamaProvider({
    model: 'llama3',
    baseURL: 'http://localhost:11434',
  }),
  tools: mcpTools,
  instructions: 'You are a helpful assistant with access to web content.',
});

// Use the agent as normal
const result = await agent.execute({
  messages: [
    {
      role: 'user',
      content: [
        { type: 'text', text: 'Look up the latest information about AI safety' },
      ],
    },
  ],
});
For more detailed usage examples and guidance, see the MCP package documentation and the building a web research agent guide.