Mcp Agent Kit

mcp-agent-kit

Orchestrate MCP servers and build AI agents in TypeScript — in your app, not in your infrastructure

Connect your agent to several MCP servers in three lines — no gateway, no proxy, no container:

const mcp = await connectMCP({
  servers: {
    files: { command: "npx", args: ["-y", "@modelcontextprotocol/server-filesystem", "./"] },
    github: { url: "https://mcp.example.com/mcp" },
  },
});

const agent = createAgent({ provider: "openai" });
agent.use(mcp);

const answer = await agent.chat("Summarise the open issues into notes.md");

mcp-agent-kit is a TypeScript package for working with MCP from inside your application:

• 🎛️ MCP Orchestrator — connect to many MCP servers, aggregate and filter their tools
• 🔍 inspect CLI — validate any MCP server’s tools without writing code
• 🔌 MCP Servers — publish your own tools over stdio or Streamable HTTP
• 🤖 AI Agents with automatic tool execution across four LLM providers
• 🧠 Intelligent Routers for multi-LLM routing
• 💬 Chatbots with conversation memory
• 🌐 API Helpers with retry and timeout

Features

• In-process: an npm install, not another service to deploy
• Tool loop included: tools are executed and their results fed back to the model
• Tool filtering: allow/deny globs keep 60 tools from bloating the prompt
• Fault isolation: a server that is down degrades the tool set, not the agent
• Multi-Provider: OpenAI, Anthropic, Gemini, Ollama
• Type-Safe: Full TypeScript support with autocomplete
• Verified docs: every example on this page is compiled in CI

Installation

npm install mcp-agent-kit

Quick Start

Create an AI Agent (1 line!)

import { createAgent } from "mcp-agent-kit";

const agent = createAgent({ provider: "openai" });
const response = await agent.chat("Hello!");
console.log(response.content);

Create an MCP Server (1 function!)

import { createMCPServer } from "mcp-agent-kit";

const server = await createMCPServer({
  name: "my-server",
  tools: [
    {
      name: "get_weather",
      description: "Get weather for a location",
      inputSchema: {
        type: "object",
        properties: {
          location: { type: "string" },
        },
      },
      handler: async ({ location }) => {
        return `Weather in ${location}: Sunny, 72°F`;
      },
    },
  ],
});

await server.start();

Create a Chatbot with Memory

import { createChatbot, createAgent } from "mcp-agent-kit";

const bot = createChatbot({
  agent: createAgent({ provider: "openai" }),
  system: "You are a helpful assistant",
  maxHistory: 10,
});

await bot.chat("Hi, my name is John");
await bot.chat("What is my name?"); // Remembers context!

Documentation

Table of Contents

• AI Agents
• MCP Servers
• MCP Orchestrator
• CLI: inspect
• LLM Router
• Chatbots
• API Requests
• Configuration
• Examples

---

AI Agents

Create intelligent agents that work with multiple LLM providers.

Basic Usage

import { createAgent } from "mcp-agent-kit";

const agent = createAgent({
  provider: "openai",
  model: "gpt-4o",
  temperature: 0.7,
  maxTokens: 2000,
});

const response = await agent.chat("Explain TypeScript");
console.log(response.content);

Supported Providers

Provider	Models	API Key Required
OpenAI	GPT-4o, GPT-4, o-series	✅ Yes
Anthropic	Claude Opus 5, Sonnet 5	✅ Yes
Gemini	Gemini 2.0+	✅ Yes
Ollama	Local models	❌ No

With Tools (Function Calling)

const agent = createAgent({
  provider: "openai",
  tools: [
    {
      name: "calculate",
      description: "Perform calculations",
      parameters: {
        type: "object",
        properties: {
          operation: { type: "string", enum: ["add", "subtract"] },
          a: { type: "number" },
          b: { type: "number" },
        },
        required: ["operation", "a", "b"],
      },
      handler: async ({ operation, a, b }) => {
        return operation === "add" ? a + b : a - b;
      },
    },
  ],
});

const response = await agent.chat("What is 15 + 27?");

With System Prompt

const agent = createAgent({
  provider: "anthropic",
  system: "You are an expert Python developer. Always provide code examples.",
});

Smart Tool Calling

Smart Tool Calling adds reliability and performance to tool execution with automatic retry, timeout, and caching.

Basic Configuration

const agent = createAgent({
  provider: "openai",
  toolConfig: {
    forceToolUse: true,      // Force model to use tools
    maxRetries: 3,           // Retry up to 3 times on failure
    toolTimeout: 30000,      // 30 second timeout
    onToolNotCalled: "retry", // Action when tool not called
  },
  tools: [...],
});

With Caching

const agent = createAgent({
  provider: "openai",
  toolConfig: {
    cacheResults: {
      enabled: true,
      ttl: 300000,    // Cache for 5 minutes
      maxSize: 100,   // Store up to 100 results
    },
  },
  tools: [...],
});

Direct Tool Execution

// Execute a tool directly with retry and caching
const result = await agent.executeTool("get_weather", {
  location: "San Francisco, CA",
});

Configuration Options

Option	Type	Default	Description
forceToolUse	boolean	false	Force the model to use tools when available
maxRetries	number	3	Maximum retry attempts on tool failure
onToolNotCalled	string	"retry"	Action when tool not called: "retry", "error", "warn", "allow"
toolTimeout	number	30000	Timeout for tool execution (ms)
cacheResults.enabled	boolean	true	Enable result caching
cacheResults.ttl	number	300000	Cache time-to-live (ms)
cacheResults.maxSize	number	100	Maximum cached results
debug	boolean	false	Enable debug logging
autoExecuteTools	boolean	true	Run requested tools and feed results back to the model
maxIterations	number	5	Maximum model round-trips in one chat() call

Complete Example

const agent = createAgent({
  provider: "openai",
  model: "gpt-4o",
  toolConfig: {
    forceToolUse: true,
    maxRetries: 3,
    onToolNotCalled: "retry",
    toolTimeout: 30000,
    cacheResults: {
      enabled: true,
      ttl: 300000,
      maxSize: 100,
    },
    debug: true,
  },
  tools: [
    {
      name: "get_weather",
      description: "Get current weather for a location",
      parameters: {
        type: "object",
        properties: {
          location: { type: "string" },
        },
        required: ["location"],
      },
      handler: async ({ location }) => {
        // Your weather API logic
        return { location, temp: 72, condition: "Sunny" };
      },
    },
  ],
});

// Tools are executed automatically and their results are sent back to the
// model, so `content` is the final answer — not an empty string with a
// pending tool call.
const response = await agent.chat("What's the weather in NYC?");

console.log(response.content);      // "It's 72°F and sunny in New York."
console.log(response.toolResults);  // [{ name: 'get_weather', result: {...} }]
console.log(response.iterations);   // 2 (one call for the tool, one for the answer)

// Or execute directly with retry and caching
const result = await agent.executeTool("get_weather", {
  location: "New York, NY",
});

---

MCP Servers

Create Model Context Protocol servers to expose tools and resources.

Basic MCP Server

import { createMCPServer } from "mcp-agent-kit";

const server = await createMCPServer({
  name: "my-mcp-server",
  port: 7777,
  logLevel: "info",
});

await server.start(); // Starts on stdio by default

With Tools

const server = await createMCPServer({
  name: "weather-server",
  tools: [
    {
      name: "get_weather",
      description: "Get current weather",
      inputSchema: {
        type: "object",
        properties: {
          location: { type: "string" },
          units: { type: "string", enum: ["celsius", "fahrenheit"] },
        },
        required: ["location"],
      },
      handler: async ({ location, units = "celsius" }) => {
        // Your weather API logic here
        return { location, temp: 22, units, condition: "Sunny" };
      },
    },
  ],
});

With Resources

const server = await createMCPServer({
  name: "data-server",
  resources: [
    {
      uri: "config://app-settings",
      name: "Application Settings",
      description: "Current app configuration",
      mimeType: "application/json",
      handler: async () => {
        return JSON.stringify({ version: "1.0.0", env: "production" });
      },
    },
  ],
});

Streamable HTTP Transport

const server = await createMCPServer({
  name: "http-server",
  port: 8080,
  path: "/mcp", // default
});

await server.start("http"); // Serves MCP at http://localhost:8080/mcp

The websocket transport was removed in v1.2.0. It accepted connections but was never wired to the MCP server, so it answered no requests while reporting itself as healthy. Use "http" (Streamable HTTP) instead — it is the transport current MCP clients speak.

---

MCP Orchestrator

createMCPServer publishes tools. connectMCP is the other half: it connects to MCP servers, aggregates their tools behind one namespace, and hands them to an agent — no gateway, no proxy, no container.

Connect to several servers

import { connectMCP, createAgent } from "mcp-agent-kit";

const mcp = await connectMCP({
  servers: {
    // stdio: started as a child process
    files: {
      command: "npx",
      args: ["-y", "@modelcontextprotocol/server-filesystem", "./"],
    },
    // Streamable HTTP: a remote server
    github: {
      url: "https://mcp.example.com/mcp",
      headers: { Authorization: `Bearer ${process.env.GITHUB_TOKEN}` },
    },
  },
});

const agent = createAgent({ provider: "openai" });
agent.use(mcp); // every MCP tool is now callable by the agent

const answer = await agent.chat("Summarise the open issues into notes.md");

await mcp.close();

Tools are namespaced by server, so two servers can both expose read without colliding: files__read, github__read.

Filter the tool surface

Six servers easily add up to 60 tools, which bloats the prompt and degrades the model's choices. Expose only what the task needs:

const mcp = await connectMCP({
  servers: {
    files: { command: "npx", args: ["-y", "@modelcontextprotocol/server-filesystem", "./"] },
  },
  // Globs match the namespaced name
  allowTools: ["files__read_*", "files__list_*"],
  denyTools: ["*__delete_*"],
});

Filters can also be set per server, against the bare tool name:

const mcp = await connectMCP({
  servers: {
    files: {
      command: "npx",
      args: ["-y", "@modelcontextprotocol/server-filesystem", "./"],
      denyTools: ["write_file", "move_file"],
    },
  },
});

A server being down does not take the agent with it

By default a failed server degrades the tool set and the rest keep working:

const mcp = await connectMCP({
  servers: {
    good: { command: "npx", args: ["-y", "@modelcontextprotocol/server-filesystem", "./"] },
    flaky: { url: "https://might-be-down.example.com/mcp" },
  },
});

console.log(mcp.listServers());
// [{ name: 'good',  state: 'connected', tools: 12, toolsAvailable: 12 },
//  { name: 'flaky', state: 'failed', error: 'fetch failed', tools: 0 }]

Pass strict: true to fail the whole connection instead.

Observability

console.log(mcp.getStats());
// { servers: 2, connected: 1, failed: 1, tools: 12,
//   calls: 4, failedCalls: 0, avgDurationMs: 37 }

console.log(mcp.getCallLog());
// [{ server: 'good', tool: 'read_file', durationMs: 12, ok: true }, ...]

Orchestrator options

Option	Type	Default	Description
servers	object	—	Servers to connect to, keyed by namespace
allowTools	string[]	—	Allowlist of namespaced names (globs allowed)
denyTools	string[]	—	Denylist of namespaced names (globs allowed)
connectTimeout	number	30000	Time to wait for a server to connect (ms)
toolTimeout	number	60000	Time a single tool call may take (ms)
namespaceSeparator	string	__	Separator between server name and tool name
strict	boolean	false	Fail the whole connect when any server fails
autoReconnect	boolean	true	Reconnect and retry once when a connection drops

Methods: getTools(), getServerTools(name), getRawTools(name), listResources(name), callTool(name, params), listServers(), getStats(), getCallLog(), getServerLogs(name), reconnect(name), close().

---

CLI: inspect an MCP server

inspect connects to any MCP server, lists what it publishes, validates its tool schemas and times the round-trips. It needs no config and no code — point it at a server and read the report.

npx mcp-agent-kit inspect npx -y @modelcontextprotocol/server-filesystem ./

Target     npx -y @modelcontextprotocol/server-filesystem ./
Transport  stdio

✓ connected in 2453ms
✓ 14 tool(s), 0 resource(s) listed in 2ms

TOOLS
  ⚠ read_file                  { path: string, tail?: number, head?: number }
  ✓ read_multiple_files        { paths: array }
  ⚠ write_file                 { path: string, content: string }
  ...

ISSUES
  ⚠ read_file: property "path" has no description

Summary  14 tool(s) · 0 resource(s) · 0 errors · 18 warning(s)

What it validates

Errors are things a real client will reject; warnings are things that make a model choose worse:

Level	Check
Error	Tool name outside [a-zA-Z0-9_-]{1,64} — OpenAI and Anthropic reject it
Error	required lists a key that properties does not declare
Error	Missing inputSchema, or type other than object
Error	Duplicate tool names
Warning	Tool or property with no description
Warning	Property with no declared type

Call a tool

npx mcp-agent-kit inspect --call read_file --args '{"path":"README.md"}' \
  npx -y @modelcontextprotocol/server-filesystem ./

Remote servers

npx mcp-agent-kit inspect https://mcp.example.com/mcp -H "Authorization: Bearer $TOKEN"

In CI

--json gives machine-readable output, and the exit code is meaningful: 0 clean, 1 schema errors, 2 could not connect.

npx mcp-agent-kit inspect --json node ./my-server.js | jq '.issues'

Options

Option	Description
--json	Machine-readable output
--quiet, -q	Summary and issues only
--timeout <ms>	Connect and call timeout (default 30000)
--header, -H	HTTP header, repeatable ("Name: value")
--env, -e	Environment variable for a stdio server, repeatable
--call <tool>	Call a tool after inspecting
--args <json>	Arguments for --call

Options go before the target; everything after the target is the server's own command line.

---

LLM Router

Route requests to different LLMs based on intelligent rules.

Basic Router

import { createLLMRouter } from "mcp-agent-kit";

const router = createLLMRouter({
  rules: [
    {
      when: (input) => input.length < 200,
      use: { provider: "openai", model: "gpt-4o" },
    },
    {
      when: (input) => input.includes("code"),
      use: { provider: "anthropic", model: "claude-opus-5" },
    },
    {
      default: true,
      use: { provider: "openai", model: "gpt-4o" },
    },
  ],
});

const response = await router.route("Write a function to sort an array");

With Fallback and Retry

const router = createLLMRouter({
  rules: [...],
  fallback: {
    provider: 'openai',
    model: 'gpt-4o'
  },
  retryAttempts: 3,
  logLevel: 'debug'
});

Router Statistics

const stats = router.getStats();
console.log(stats);
// { totalRules: 3, totalAgents: 2, hasFallback: true }

const agents = router.listAgents();
console.log(agents);
// ['openai:gpt-4o', 'anthropic:claude-opus-5']

---

Chatbots

Create conversational AI with automatic memory management.

Basic Chatbot

import { createChatbot, createAgent } from "mcp-agent-kit";

const bot = createChatbot({
  agent: createAgent({ provider: "openai" }),
  system: "You are a helpful assistant",
  maxHistory: 10,
});

await bot.chat("Hi, I am learning TypeScript");
await bot.chat("Can you help me with interfaces?");
await bot.chat("Thanks!");

With Router

const bot = createChatbot({
  router: createLLMRouter({ rules: [...] }),
  maxHistory: 20
});

Memory Management

// Get conversation history
const history = bot.getHistory();

// Get statistics
const stats = bot.getStats();
console.log(stats);
// {
//   messageCount: 6,
//   userMessages: 3,
//   assistantMessages: 3,
//   oldestMessage: Date,
//   newestMessage: Date
// }

// Reset conversation
bot.reset();

// Update system prompt
bot.setSystemPrompt("You are now a Python expert");

---

API Requests

Simplified HTTP requests with automatic retry and timeout.

Basic Request

import { api } from "mcp-agent-kit";

const response = await api.get("https://api.example.com/data");
console.log(response.data);

POST Request

const response = await api.post(
  "https://api.example.com/users",
  { name: "John", email: "[email protected]" },
  {
    name: "create-user",
    headers: { "Content-Type": "application/json" },
  }
);

With Retry and Timeout

const response = await api.request({
  name: "important-request",
  url: "https://api.example.com/data",
  method: "GET",
  timeout: 10000, // 10 seconds
  retries: 5, // 5 attempts
  query: { page: 1, limit: 10 },
});

All HTTP Methods

await api.get(url, config);
await api.post(url, body, config);
await api.put(url, body, config);
await api.patch(url, body, config);
await api.delete(url, config);

---

Configuration

Environment Variables

All configuration is optional. Set these environment variables or pass them in code:

# MCP Server
MCP_SERVER_NAME=my-server
MCP_PORT=7777

# Logging
LOG_LEVEL=info  # debug | info | warn | error

# LLM API Keys
OPENAI_API_KEY=sk-...
ANTHROPIC_API_KEY=sk-ant-...
GEMINI_API_KEY=...
OLLAMA_HOST=http://localhost:11434

Using .env File

# .env
OPENAI_API_KEY=sk-...
ANTHROPIC_API_KEY=sk-ant-...
LOG_LEVEL=debug

The package automatically loads .env files using dotenv.

---

Examples

Check out the /examples directory for complete working examples:

• basic-agent.ts - Simple agent usage
• smart-tool-calling.ts - Smart tool calling with retry and caching
• mcp-server.ts - MCP server with tools and resources
• mcp-server-http.ts - MCP server over Streamable HTTP
• mcp-orchestrator.ts - Connect to several MCP servers and hand them to an agent
• llm-router.ts - Intelligent routing between LLMs
• chatbot-basic.ts - Chatbot with conversation memory
• chatbot-with-router.ts - Chatbot using router
• api-requests.ts - HTTP requests with retry

Running Examples

# Install dependencies
npm install

# Run an example
npx ts-node examples/basic-agent.ts

---

API Reference

Agent API

createAgent(config: AgentConfig)

Creates a new AI agent instance.

Parameters:

• provider (required): LLM provider - "openai", "anthropic", "gemini", or "ollama"
• model (optional): Model name (defaults to provider's default)
• temperature (optional): Sampling temperature 0-2 (default: 0.7)
• maxTokens (optional): Maximum tokens in response (default: 2000)
• apiKey (optional): API key (reads from env if not provided)
• tools (optional): Array of tool definitions
• system (optional): System prompt
• toolConfig (optional): Smart tool calling configuration

Returns: Agent instance

Methods:

• chat(message: string | AgentMessage[]): Promise<AgentResponse> - Send a message and get the final answer, running any tools the model asks for
• executeTool(name: string, params: any): Promise<any> - Execute a tool directly
• registerTools(tools: AgentTool[]): Agent - Add tools to a live agent
• listTools(): AgentTool[] - Tools currently visible to the model
• cleanup(): void - Release cache timers

AgentResponse

Response object from agent.chat():

{
  content: string;           // Final response text
  toolCalls?: Array<{        // Tools still pending (empty once the loop finishes)
    id?: string;
    name: string;
    arguments: any;
  }>;
  toolResults?: Array<{      // Tools executed while producing this response
    toolCallId: string;
    name: string;
    result: any;
    isError?: boolean;
  }>;
  iterations?: number;       // Model round-trips taken (1 when no tool ran)
  usage?: {                  // Token usage, summed across every round-trip
    promptTokens: number;
    completionTokens: number;
    totalTokens: number;
  };
}

MCP Server API

createMCPServer(config: MCPServerConfig)

Creates a new MCP server instance.

Parameters:

• name (optional): Server name (default: from env or "mcp-server")
• port (optional): Port number (default: 7777)
• logLevel (optional): Log level - "debug", "info", "warn", "error"
• tools (optional): Array of tool definitions
• resources (optional): Array of resource definitions

Returns: Promise<MCPServer> — the function is async (it loads the MCP SDK first), so always await it

Methods:

• start(transport?: "stdio" | "websocket"): Promise<void> - Start the server

Router API

createLLMRouter(config: LLMRouterConfig)

Creates a new LLM router instance.

Parameters:

• rules (required): Array of routing rules
• fallback (optional): Fallback provider configuration
• retryAttempts (optional): Number of retry attempts (default: 3)
• logLevel (optional): Log level

Returns: Router instance

Methods:

• route(input: string): Promise<AgentResponse> - Route input to appropriate LLM
• getStats(): object - Get router statistics
• listAgents(): string[] - List all configured agents

Chatbot API

createChatbot(config: ChatbotConfig)

Creates a new chatbot instance with conversation memory.

Parameters:

• agent or router (required): Agent or router instance
• system (optional): System prompt
• maxHistory (optional): Maximum messages to keep (default: 10)

Returns: Chatbot instance

Methods:

• chat(message: string): Promise<string> - Send message with context, returns the reply text
• getHistory(): ChatMessage[] - Get conversation history
• getStats(): object - Get conversation statistics
• reset(): void - Clear conversation history
• setSystemPrompt(prompt: string): void - Update system prompt

API Request Helpers

api.request(config: APIRequestConfig)

Make HTTP request with retry and timeout.

Parameters:

• name (optional): Request name for logging
• url (required): Request URL
• method (optional): HTTP method (default: "GET")
• headers (optional): Request headers
• query (optional): Query parameters
• body (optional): Request body
• timeout (optional): Timeout in ms (default: 30000)
• retries (optional): Retry attempts (default: 3)

Returns: Promise<APIResponse>

Convenience Methods:

• api.get(url, config?) - GET request
• api.post(url, body, config?) - POST request
• api.put(url, body, config?) - PUT request
• api.patch(url, body, config?) - PATCH request
• api.delete(url, config?) - DELETE request

---

Advanced Usage

Custom Provider

// Coming soon: Plugin system for custom providers

Middleware

// Coming soon: Middleware support for request/response processing

Streaming Responses

// Coming soon: Streaming support for real-time responses

---

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

---

License

MIT © Dominique Kossi

---

Acknowledgments

• Built with TypeScript
• Uses MCP SDK
• Powered by OpenAI, Anthropic, Google, and Ollama

---

Support

• Email: [email protected]
• Issues: GitHub Issues
• Discussions: GitHub Discussions

---

Made by developers, for developers