artinet SDK

The artinet SDK is a TypeScript library designed for Agentic Communication. It's written for node.js and aims to simplify the creation of interoperable AI agents. Learn more at the artinet project.

This SDK leverages a service-oriented architecture for building AI agents allowing developers to easily create agents as simple processes or seamlessly embed them within a dedicated server.

Quick Start

To build your own agent/server use the create-quick-agent (supports v0.5.2) command:

npx @artinet/create-quick-agent@latest

It has serveral template projects that you can use to get started building agents today.

Features

Service-Oriented Architecture: Modern, modular design with a dedicated layer for protocol handling and state management.
Modern Express Server: Quickly create an Express Server with the createAgentServer() function. It handles all of the transport-layer complexity, adds an A2A <-> JSON-RPC middleware, and manages Server-Sent Events (SSE) automatically.
TypeScript First: Written in TypeScript with a fully implemented Zod <-> A2A schema.
Protocol Compliance: Implements the complete A2A specification (v0.3.0) with support for any kind of transport layer (Express, tRPC, WebSockets, etc).
Code Deployment: Bundle, test, and deploy agent code onto the artinet via the ./deployment module (v0.5.3). Includes bundler, agent handler, and deployment utilities.

Component/Feature	Description	Key Classes/Types
Client	Interact with A2A-compliant agents. Supports standard & streaming requests.	`A2AClient`
Server	Quickly spin up an Agent as a Server.	`createAgentServer`, `ExpressAgentServer`, `jsonRPCMiddleware`
Agent Creation	Design agents with the Agent Builder or take control with the Agent Engine.	`AgentEngine`, `Context`, `AgentBuilder`
Storage	Persist event state. In-memory and file-based options included.	`Store`, `InMemoryTaskStore`, `FileStore`
Streaming (SSE)	Handle real-time updates via Server-Sent Events with middleware support.	Built-in SSE handling, streaming generators
Event Handling	Monitor agent execution with our event system.	`EventManager`, `eventOverrides`, Event listeners (`start`, `update`, `error`, `complete`, `cancel`)
Logging	Configure structured logging for debugging and monitoring.	`logger`, `configureLogger`, `LogLevel`
Transport Layers	Built-in support for Express/TRPC.	Express middleware, tRPC router, or easily create your own.
Core Types	Fully implement A2A schema in Zod.	`AgentCard`, `Task`, `Message`, `Part`, `Artifact`, etc.
Deployment	Bundle, test, and deploy agents onto the artinet platform (v0.5.2).	`@artinet/sdk/deployment`, `fullDeployment`, `testDeployment`, `bundle`
Agent Utilities	Run agents in managed environments with our proxy system.	`artinet.v0.taskManager`, `artinet.v0.connect`, `artinet.v0.agent`

Installation

npm install @artinet/sdk

Requirements

Node.js (v22.0.0 or higher recommended)

Documentation

For more detailed documentation visit our documentation site here.

Example

A basic A2A server and client interaction (For simple agents see the AgentBuilder section). For more detailed examples, see the examples/ directory.

1. Server (quick-server.ts)

import {
  createAgentServer,
  ExecutionContext,
  AgentEngine,
  TaskManager,
  MessageSendParams,
  getParts,
} from "@artinet/sdk";

//Define your Agents Behaviour
const quickAgentLogic: AgentEngine = async function* (context: Context) {
  const params: MessageSendParams = context.command; //MessageSendParams
  const { text: userInput} = getParts(params.message.parts); //helper function to consume parts
  const task = context.State(); //TaskAndHistory
  yield {
      ...
      state: "working"
      ...
    };

  yield {
    ...
    state: "completed",
    message: {
      role: "agent",
      parts: [{ kind: "text", text: `You said: ${userInput}` }],
    },
    ...
  };
};

// Create an agent server
const { app, agent } = createAgentServer({
  agent: {
    engine: quickAgentLogic,
    agentCard: {
      name: "QuickStart Agent",
      url: "http://localhost:4000/a2a",
      version: "0.1.0",
      capabilities: { streaming: true },
      skills: [{ id: "echo", name: "Echo Skill" }],
      ...
    },
    tasks: new TaskManager(),
    ...
  },
  basePath: "/a2a",
  agentCardPath: "/.well-known/agent.json"
  ...
});

app.listen(4000, () => {
  console.log("A2A Server running at http://localhost:4000/a2a");
});

2. Client (quick-client.ts)

import { A2AClient, TaskStatusUpdateEvent } from "@artinet/sdk";

async function runClient() {
  const client = new A2AClient("http://localhost:4000/a2a");

   const message = {
    messageId: "test-message-id",
    kind: "message",
    role: "user",
    parts: [{ kind: "text", text: "Hello World!" }],
    ...
  };

  const stream = client.sendStreamingMessage({ message });

  for await (const update of stream) {
    // process the updates
    ...
  }
  console.log("Stream finished.");
}

runClient().catch(console.error);

Running Tests

npm test

To run tests with coverage:

npm run test:coverage

Typescript

The Artinet SDK is written entirely in TypeScript and includes comprehensive type definitions, providing strong typing and enhanced developer experience.

Usage

Client

Interact with A2A-compliant agents using the A2AClient. See examples/ for more.

Basic Client Usage

Send a message using message/send.

import { A2AClient, Message } from "@artinet/sdk";

async function runBasicTask() {
  const client = new A2AClient("https://your-a2a-server.com/a2a");
  const message: Message = {
    messageId: "test-message",
    kind: "message",
    role: "user",
    parts: [{ kind: "text", text: "What is the capital of France?" }],
    ...
  };

  const task = await client.sendMessage({ message });
  console.log("Task Completed:", task);
}

Streaming Updates

Receive real-time updates via SSE using message/stream (recommended).

import {
  A2AClient,
  Message,
  TaskStatusUpdateEvent,
  TaskArtifactUpdateEvent,
} from "@artinet/sdk";

async function runStreamingTask() {
  const client = new A2AClient("https://your-a2a-server.com/a2a");
  const message: Message = {
    role: "user",
    parts: [{ kind: "text", text: "Tell me a short story." }],
    ...
  };

  const stream = client.sendStreamingMessage({
    message,
  });

  for await (const update of stream) {
    if ((update as TaskStatusUpdateEvent).status) {
      console.log("Status:", (update as TaskStatusUpdateEvent).status.state);
    } else if ((update as TaskArtifactUpdateEvent).artifact) {
      console.log(
        "Artifact:",
        (update as TaskArtifactUpdateEvent).artifact.name
      );
    }
  }
  console.log("Stream finished.");
}

Authentication

Add headers using addHeader or setHeaders.

import { A2AClient } from "@artinet/sdk";

const client = new A2AClient("https://your-secure-a2a-server.com/a2a");

// Add a single header
client.addHeader("Authorization", "Bearer your-api-token");

// Set multiple headers (overwrites existing)
client.setHeaders({ Authorization: "Bearer ...", "X-Custom": "value" });

Server

Use createAgentServer() to embed your Agents in an Express App.

Implementing an A2A Agent

The SDK provides a variety of options for creating complex (AgentEngine) or simple agents (AgentBuilder).

AgentBuilder

Option 1: Using AgentBuilder (Recommended for Simple Workflows)

For simple agents with one or more processing steps, use the AgentBuilder pattern:

import { createAgentServer, AgentBuilder, TaskManager } from "@artinet/sdk";

//create a simple agent
const simpleAgent = AgentBuilder().text(() => "hello world!");

//or design a powerful workflow
const { app, agent } = createAgentServer({
  agent: AgentBuilder()
    .text(({ command, context }) => {
      const userMessage =
        command.message.parts[0]?.kind === "text"
          ? command.message.parts[0].text
          : "";
      return {
        parts: [`Processing: ${userMessage}`], //parts are immediately sent back to the caller as TaskStatusUpdateEvents
        args: [userMessage], //args are passed to the next step
      };
    })
    .file(({ command, args }) => {
      const processedText = args[0];
      return {
        parts: [
          {
            name: "result.txt",
            mimeType: "text/plain",
            bytes: `Processed result: ${processedText}`,
          },
        ],
        args: ["file-generated"],
      };
    })
    .text(({ command, args }) => {
      const status = args[0];
      return `Task completed. Status: ${status}`;
    }) //A final Task is returned to the caller which contains all of the emitted parts.
    .createAgent({
      agentCard: {
        name: "Multi-Step Agent",
        url: "http://localhost:3000/a2a",
        version: "1.0.0",
        capabilities: { streaming: true },
        skills: [{ id: "multi-processor", name: "Multi-Step Processor" }],
      },
      tasks: new TaskManager(),
    }),
  basePath: "/a2a",
});

app.listen(3000, () => {
  console.log("Multi-Step A2A Server running on http://localhost:3000/a2a");
});

The AgentBuilder approach is particularly useful when you need:

Step-by-step processing: Break down complex tasks into discrete, manageable steps
Data flow between steps: Pass results from one step to the next using the args parameter
Different content types: Mix text, file, and data processing in a single workflow
Reusable components: Build modular agents that can be easily edited or extended

AgentEngine

Option 2: Direct AgentEngine Implementation

When you need full control over the execution flow, implement an AgentEngine directly:

import {
  createAgentServer,
  Context,
  AgentEngine,
  TaskManager,
} from "@artinet/sdk";

const myAgent: AgentEngine = async function* (context: Context) {
  const task: TaskAndHistory = context.events.getState();
  yield {
    state: "working",
    message: {
      ...
      role: "agent",
      parts: [{ kind: "text", text: "Processing..." }],
    },
    ...
  };
  yield {
    ...
    name: "result.txt",
    mimeType: "text/plain",
    parts: [{ kind: "text", text: "Report data" }],
  };

  yield {
    ...
    state: "completed",
    message: {
      kind: "message"
      role: "agent",
      parts: [{ kind: "text", text: "Finished processing." }],
      ...
    },
  };
};

const { app, agent } = createAgentServer({
  agent: {
    engine: myAgent,
    agentCard: {
      name: "Example Agent",
      url: "http://localhost:3000/a2a",
      version: "1.0.0",
      capabilities: { streaming: true },
      skills: [{ id: "processor", name: "Text Processor" }],
    },
    tasks: new TaskManager(),
  },
  basePath: "/a2a",
  agentCardPath: "/.well-known/agent-card.json",
});

Event Handling/Monitoring & Message Streaming

The SDK provides comprehensive event handling & message streaming capabilities that allow you to modify agent execution, subscribe to events, stream commands, and respond to state changes in real-time.

Override Event Behaviour

When using the service layer, you can provide your own Event Handlers:

import { createAgent, TaskManager, ContextManager, Command, SendCommandInterface } from "@artinet/sdk";

const customContextManager = new ContextManger();
const agent = createAgent({
  engine: (context: Context){
    context.events.on("update", (currentState, nextState) => {
      //allow other processes to subscribe to your agent
    })
    ...
    //handle command streams directly within an agent
    for await (const command of context.command) {
      console.log("new command recieved: ", command);
      //will continue polling until the command stream is closed by calling command.close();
    }
    //or process them asynchronously
    context.command.on("send", (command) => {
      ...
    });
  },
  agentCard: {
    name: "Event-Monitored Agent",
    url: "http://localhost:3000/a2a",
    version: "1.0.0",
    capabilities: { streaming: true },
    skills: [{ id: "monitor", name: "Monitored Agent" }],
  },
  contexts: customContextManager,
  tasks: new TaskManager(),
  eventOverrides: { //for even greater control create your own Event Handlers
    onStart: async (context) => {
      ...
      return currentState;
    },
    onUpdate: async (currentState, nextState) => {
      ...
      return currentState;
    },
    ...
  },
});

const result = await agent.sendMessage({
  contextId: "123"
  ...
});

const currentContext = customContextManager.getContext("123");

//subscribe to the events from a specific context
currentContext.events.on("complete", () {
  ...
  //errors thrown here will be triggered in the original context
});

//stream new commands into a running context
(currentContext.command as SendCommandInterface<Command>).send({
  ...
});

currentContext.command.close();

Available Event Types

The EventManager supports the following event types:

OnStart/start: Fired when agent execution begins
OnUpdate/update: Fired on each state update during execution
OnError/error: Fired when an error occurs during execution
OnComplete/complete: Fired when agent execution completes successfully
OnCancel/cancel: Fired when agent execution is cancelled

Persistent Storage

For storage, use our out of the box storage providers like FileStore. Or implement the Store interface to create your own.

import path from "path";
import fs from "fs";
import { FileStore } from "@artinet/sdk";

//make sure the directory exists
const dataDir = path.join(process.cwd(), "a2a-data");
if (!fs.existsSync(dataDir)) {
  fs.mkdirSync(dataDir, { recursive: true });
}

const myStore = new FileStore(dataDir);

const { app, agent } = createAgentServer({
  agent: {
    engine: myAgent,
    agentCard: {
      ...
    },
    tasks: myStore,
  },
  ...
});

Logging

Use the built-in pino-based logger. Configure with configureLogger.

import { logger, configureLogger, LogLevel, logDebug } from "@artinet/sdk";

// Configure logging level (optional)
configureLogger({ level: "debug" });

logger.info("Server starting...");
//use helper functions
logDebug("LoggerTest", { taskId: "task-123" }, "Task status updated.");

// Create child loggers with bounded contexts
const taskLogger = logger.child({ taskId: "abc" });
taskLogger.info("Processing step X");

Server Registration & Discovery (v0.5.2)

The SDK includes features to help make your agent discoverable using the new service-based architecture:

Automatic Registration: You can configure your agent server to automatically register your AgentCard with the A2A Registry upon startup by setting register: true in the server parameters (temporarily unavailable in v0.5.6).

const { app, agent } = createAgentServer({
  agent: {
    engine: myAgent,
    agentCard: {
      // ...
      url: "http://my-public-domain:3000/my-agent", // Publicly accessible URL
      // ...
    },
  },
});

Custom Agent Card Path: By default, the server exposes its AgentCard at /.well-known/agent-card.json following RFC8615. You can specify a custom path using the agentCardPath option.

const { app, agent } = createAgentServer({
  ...
  basePath: "/apiV2",
  agentCardPath: "/apiV2/custom-card-info", // Custom agent card path
});
// The AgentCard is now accessible at http://localhost:3000/apiV2/custom-card-info

Advanced Server Customization

Our new architecture provides multiple ways to customize your agent server:

1. Using createAgentServer: Easily spin up an A2A Express app createAgentServer():

const initialApp = express();

// custom middleware
initialApp.use((req, res, next) => {
  ...
  next();
});

const { app, agent } = createAgentServer({
  app: initialApp
  agent: {
    ...
  },
});

// custom middleware
app.use("/custom", (req, res, next) => {
  ...
});

2. Use the JSON-RPC Middleware: Directly import our preconfigured JSON-RPC middleware:

import express from "express";
import { createAgent, jsonRPCMiddleware, errorHandler, InMemoryTaskStore } from "@artinet/sdk";

const customApp = express();

const agent = createAgent({
  engine: myAgentLogic,
  agentCard: {
    ...
  },
  tasks: new InMemoryTaskStore(),
});

customApp.use("/auth", yourAuthMiddleware);
customApp.use("/metrics", yourMetricsMiddleware);
customApp.use(express.json());

// Add the A2A middleware
customApp.post("/", async (req, res, next) => {
  return await jsonRPCMiddleware(agent, req, res, next);
});
// Dont forget to add error handling*
customApp.use(errorHandler);

// Serve the agent card
customApp.get("/.well-known/agent-card.json", (req, res) => {
  res.json(agent.agentCard);
});

// Start your custom server
const server = customApp.listen(3000, () => {
  console.log("Custom A2A server running on port 3000");
});

3. Using Custom Transport Layers: Use our preconfigured TRPC router, or create your own integration with WebSockets & other protocols:

import { createAgentRouter } from "@artinet/sdk";

const agentRouter = createAgentRouter();

Use the Agent: Directly invoke the agent to use it locally:

import { createAgent } from "@artinet/sdk";

const agent = createAgent({
  engine: myAgentLogic,
  agentCard: {
    ...
  },
  tasks: new InMemoryTaskStore(),
});

// Wrap these calls in your desired transport logic
const result = await agent.sendMessage({
  ...
});

// Directly process streams
const stream = agent.streamMessage({
  ...
});

for await (const update of stream) {
  ...
}

Important: When using custom implementations, ensure you handle:

Server-Sent Events (SSE) for message/stream and tasks/resubscribe
Agent card endpoints at /.well-known/agent-card.json
Proper error handling and JSON-RPC compliance
CORS headers if needed for web clients

Cross Protocol Support

MCP (Model Context Protocol) Integration

The SDK provides a Model Context Protocol (MCP) <-> A2A compatability layer.

Use createMCPAgent to expose your agent via MCP:

import { createMCPAgent, createAgent } from "@artinet/sdk";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { Client } from "@modelcontextprotocol/sdk/client/index.js";

// Wrap your agent in an MCP Server
const mcpAgent = createMCPAgent({
  serverInfo: {
    name: "My MCP Agent",
    version: "1.0.0",
  },
  options: {
    ...
  },
  agent: createAgent({
    engine: myAgentEngine,
    agentCard: {
      name: "My Agent",
      url: "http://localhost:3000/a2a",
      version: "1.0.0",
      capabilities: { streaming: true },
      skills: [{ id: "helper", name: "Helper Agent" }],
    },
  }),
  agentCardUri: "agent://card", //customize the URI for your AgentCard
});

// The MCPAgent is a fully compliant MCP Server so you can use it as you normally would.
mcpAgent.registerTool({
  ...
});

await mcpAgent.connect(new StdioServerTransport());

Use an MCP Client to interact with an mcpAgent:

...
// Access the AgentCard as a Resource
const agentCard = await client.readResource({ uri: "agent://card" });

// or send messages via Tool Calling
const result = await client.callTool({
  name: "send-message",
  arguments: {
    ...
    message: {
      ...
      parts: [{ kind: "text", text: "Hello from MCP!" }],
    },
  },
});

MCP Tools & Resources:

send-message: Send messages to the A2A agent
get-task: Retrieve tasks by ID
cancel-task: Cancel a running task
agent://card: Retrieve the AgentCard
send-streaming-message, task-resubscribe & push-notifications etc are currently not supported by default.
- Leverage the A2A Zod Schemas to implement them manually.

Quick-Agents (Alpha v0.5.2)

We are excited to introduce new capabilities for deploying agents directly onto the artinet.

We've added a testDeployment utility which is available for all users letting you bundle and test your agent logic in a temporary sandboxed environment.

QUICK-AGENTS Use the fullDeployment utility, which allows direct deployment of your bundled agent code and AgentCard to the Artinet platform (requires an ARTINET_API_KEY).

To join the beta waitlist, please email us at [email protected] and stay tuned for more updates!

Key features include:

Easy Agent Bundling: Bundle your agent's code and dependencies into a single file using the bundle utility from the new deployment export.

import { bundle } from "@artinet/sdk/deployment";

const bundledCode = await bundle(new URL("./your-agent.ts", import.meta.url));

Sandboxed Enviroments: Streamline agent logic for quick and easy deployments. The new artinet.v0 namespace (accessible via @artinet/sdk/agents) provides taskManager, connect, and agent.

artinet.v0.taskManager: Manages the agent's lifecycle by iterating over the agent's TaskHandler and communicating updates to the host environment.
artinet.v0.connect: Replaces the deprecated fetchResponseProxy. Allows agents to make proxied calls to other agents or LLMs via the host environment.
artinet.v0.agent: A factory function to obtain a ClientProxy for type-safe communication with other agents, managed by the host environment.

Example of using the new artinet.v0 utilities in an agent:

import { TaskContext, TaskYieldUpdate, Task } from "@artinet/sdk";
import { artinet } from "@artinet/sdk/agents";

export async function* myAgentLogic(context: TaskContext): AsyncGenerator<TaskYieldUpdate, Task | void, unknown> {
  yield { state: "working" };

  // Call another agent/LLM using artinet.v0.connect
  const llmResponse = await artinet.v0.connect({
    agentId: "SomeLLMAgentID",
    messages: [{ role: "user", content: "Tell me a joke." }]
  });

  // Or communicate tasks with artinet.v0.agent
  const anotherAgent = artinet.v0.agent({
    baseUrl: "https://agents.artinet.io/agentId=456",
  });
  const taskResult = await anotherAgent.sendTask({
    ...
  });

}

// The host environment will invoke this taskManager with the agent's logic.
await artinet.v0.taskManager({ taskHandler: myAgentLogic });

Note: The taskHandlerProxy and fetchResponseProxy utilities are now deprecated in favor of artinet.v0.taskManager and artinet.v0.connect respectively.

Test-Agents (Experimental): Simulate and test your agents @ agents.artinet.io/test/deploy using the testDeployment tool.

import {
  testDeployment,
  ServerDeploymentRequestParams,
  SendTaskRequest,
} from "@artinet/sdk/deployment";

const deploymentParams: ServerDeploymentRequestParams = {
  code: "/* bundled code string */",
};
//create a list of tasks for your agent to complete once deployed
const testRequests: SendTaskRequest[] = [
  {
    id: "t1",
    message: { role: "user", parts: [{ type: "text", text: "Hi!" }] },
  },
];

for await (const result of testDeployment(deploymentParams, testRequests)) {
  console.log(result); //process the task completion requests as they come in to confirm your agents logic
}

Full Deployment (Experimental): Deploy your agent to the Artinet platform using the fullDeployment utility.

import {
  fullDeployment,
  ServerDeploymentRequestParams,
} from "@artinet/sdk/deployment";

const deploymentParams: ServerDeploymentRequestParams = {
  name: "My Awesome Agent",
  agentCard: {
    /* your agent card */
  },
  code: "/* bundled code string */",
};

const deploymentResult = await fullDeployment(deploymentParams); // Requires an ARTINET_API_KEY environment variable
console.log("Deployment Result:", deploymentResult);

Dedicated Endpoints: Once deployed your agent will be available On-Demand at its dedicated enpoint. (e.g. "https://agents.artinet.io/agentId=0xabf698845743538727a81352bfcfdb724e5c2bbe3113a26362482248f9f3e5fa/.well-known/agent-card.json")
New Types: To support these features, new types for server deployment requests and responses (such as ServerDeploymentRequestParams, ServerDeploymentResponse) have been added to src/types/extended-schema.ts. New types for sandboxed agent interactions (TaskProxy, ConnectAPICallback, ClientProxy, etc.) are in src/types/proxy.ts.

QUICK-AGENT FAQs

Test-Agents expire after 60s (need more time? let us know @[email protected])
Quick-Agents do not have access to a filesystem or networking (limited persistance & networking capabalities are on the project roadmap).
Quick-Agents v0 does not support streaming, push notifications or state transition history (these capabilities are on the project roadmap).
Larger deployments can take significant time to deploy which may cause fullDeployment to timeout. In such cases wait to see if the listing has been added to your account before trying to deploy again.
Quick-Agent logic is public, therefore the artinet project is not liable for any sensitive material held within a deployment.
Available with version 0.5.6+ of the SDK with enhanced deployment capabilities.

Sign-up at artinet.io to deploy your Quick-Agent today!

Contributing

Contributions are welcome! Please open an issue or submit a Pull Request on GitHub.

Ensure code adheres to the project style and passes linting (npm run lint) and tests (npm test).

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Acknowledgements

This SDK builds upon the concepts and specifications of the Agent2Agent (A2A) Protocol initiated by Google. It utilizes the official A2A JSON Schema for protocol compliance.

Libraries used include:

Express.js for the server framework.
Pino for logging.
EventSource Parser for SSE streaming.

Name		Name	Last commit message	Last commit date
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deps		deps
examples		examples
quickstart		quickstart
src		src
tests		tests
.gitignore		.gitignore
.gitmodules		.gitmodules
CHANGELOG.md		CHANGELOG.md
LICENSE		LICENSE
README.md		README.md
eslint.config.js		eslint.config.js
jest.config.js		jest.config.js
llms.txt		llms.txt
package.json		package.json
project-structure.txt		project-structure.txt
tsconfig.json		tsconfig.json

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artinet SDK

Quick Start

Table of Contents

Features

Installation

Requirements

Documentation

Example

Running Tests

Typescript

Usage

Client

Basic Client Usage

Streaming Updates

Authentication

Server

Implementing an A2A Agent

AgentBuilder

AgentEngine

Event Handling/Monitoring & Message Streaming

Persistent Storage

Logging

Server Registration & Discovery (v0.5.2)

Advanced Server Customization

Cross Protocol Support

Quick-Agents (Alpha v0.5.2)

Contributing

License

Acknowledgements

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