# How to integrate Taxjar MCP with Autogen

```json
{
  "title": "How to integrate Taxjar MCP with Autogen",
  "toolkit": "Taxjar",
  "toolkit_slug": "taxjar",
  "framework": "AutoGen",
  "framework_slug": "autogen",
  "url": "https://composio.dev/toolkits/taxjar/framework/autogen",
  "markdown_url": "https://composio.dev/toolkits/taxjar/framework/autogen.md",
  "updated_at": "2026-05-12T10:27:58.416Z"
}
```

## Introduction

This guide walks you through connecting Taxjar to AutoGen using the Composio tool router. By the end, you'll have a working Taxjar agent that can calculate sales tax for a new order, list all order transactions this month, show your current nexus regions through natural language commands.
This guide will help you understand how to give your AutoGen agent real control over a Taxjar account through Composio's Taxjar MCP server.
Before we dive in, let's take a quick look at the key ideas and tools involved.

## Also integrate Taxjar with

- [OpenAI Agents SDK](https://composio.dev/toolkits/taxjar/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/taxjar/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/taxjar/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/taxjar/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/taxjar/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/taxjar/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/taxjar/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/taxjar/framework/cli)
- [Google ADK](https://composio.dev/toolkits/taxjar/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/taxjar/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/taxjar/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/taxjar/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/taxjar/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/taxjar/framework/crew-ai)

## TL;DR

Here's what you'll learn:
- Get and set up your OpenAI and Composio API keys
- Install the required dependencies for Autogen and Composio
- Initialize Composio and create a Tool Router session for Taxjar
- Wire that MCP URL into Autogen using McpWorkbench and StreamableHttpServerParams
- Configure an Autogen AssistantAgent that can call Taxjar tools
- Run a live chat loop where you ask the agent to perform Taxjar operations

## What is AutoGen?

Autogen is a framework for building multi-agent conversational AI systems from Microsoft. It enables you to create agents that can collaborate, use tools, and maintain complex workflows.
Key features include:
- Multi-Agent Systems: Build collaborative agent workflows
- MCP Workbench: Native support for Model Context Protocol tools
- Streaming HTTP: Connect to external services through streamable HTTP
- AssistantAgent: Pre-built agent class for tool-using assistants

## What is the Taxjar MCP server, and what's possible with it?

The Taxjar MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Taxjar account. It provides structured and secure access to your sales tax data, so your agent can perform actions like calculating sales tax, managing transactions, listing customers, and monitoring nexus regions on your behalf.
- Real-time tax calculation for orders: Instantly calculate accurate sales tax for new orders, factoring in nexus addresses, line items, shipping, and exemptions.
- Order and refund transaction management: Let your agent create, list, or delete order and refund transactions to streamline your sales and returns workflow.
- Customer database access: Effortlessly retrieve, list, or delete customer records for tax reporting and compliance purposes.
- Nexus region insights: Quickly identify and list all nexus regions where your business has sales tax obligations.
- Automated transaction reporting: Access up-to-date lists of transactions and refunds for reconciliation, filing, and audit readiness.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `TAXJAR_CALCULATE_SALES_TAX_FOR_AN_ORDER` | Calculate Sales Tax For An Order | Tool to calculate sales tax for an order. Use when you need an accurate tax calculation including nexus addresses, line items, shipping, and exemptions. |
| `TAXJAR_CREATE_CUSTOMER` | Create Customer | Tool to create a new customer with exemption information. Use when you need to add a customer to your TaxJar account for tax exemption management. |
| `TAXJAR_CREATE_ORDER_TRANSACTION` | Create Order Transaction | Creates a new order transaction in TaxJar for sales tax reporting and compliance. This action records order transactions that will appear in the TaxJar dashboard for tax filing purposes. The transaction includes customer location, order amounts, shipping costs, and sales tax collected. Important: The 'amount' field must include shipping but exclude sales tax. If line_items are provided, their sum (quantity * unit_price - discount) must equal amount minus shipping. |
| `TAXJAR_CREATE_REFUND_TRANSACTION` | Create Refund Transaction | Tool to create a new refund transaction. Use after confirming refund details. |
| `TAXJAR_DELETE_CUSTOMER` | Delete Customer | Tool to delete an existing customer. Use when you need to remove a previously created customer by its ID. Example: "Delete customer cust_12345". |
| `TAXJAR_DELETE_ORDER_TRANSACTION` | Delete Order Transaction | Tool to delete an existing order transaction. Use when you need to remove a previously created order transaction by its ID. Example: "Delete transaction abc123". |
| `TAXJAR_DELETE_REFUND_TRANSACTION` | Delete Refund Transaction | Tool to delete an existing refund transaction. Use when you need to remove a previously created refund transaction by its ID. Example: "Delete refund 243345". |
| `TAXJAR_LIST_CUSTOMERS` | List Customers | Lists all customer IDs from your TaxJar account. Returns a paginated list of customer IDs (strings). To get full details for a specific customer (including name, address, exemption type, etc.), use the customer ID with the 'Show Customer' action. Use this action to: - Browse all customers in your TaxJar account - Find customer IDs for further operations - Check which customers have been created |
| `TAXJAR_LIST_NEXUS_REGIONS` | List Nexus Regions | Tool to list existing nexus regions for an account. Use after authenticating your account to discover where you have nexus for sales tax purposes. |
| `TAXJAR_LIST_ORDER_TRANSACTIONS` | List Order Transactions | List order transaction IDs within a date range. Returns an array of transaction IDs (strings) for orders created between the specified dates. Use this to discover which orders exist in a date range, then use SHOW_ORDER_TRANSACTION to get details for specific IDs. |
| `TAXJAR_LIST_REFUND_TRANSACTIONS` | List refund transactions | Lists refund transaction IDs within a specified date range. Returns an array of transaction IDs only. To get detailed information about a specific refund, use the 'Show refund transaction' action with the ID. Useful for finding refunds created through the TaxJar API within a specific time period. |
| `TAXJAR_LIST_TAX_CATEGORIES` | List Tax Categories | Tool to list all product tax categories and their codes. Use when you need to discover available tax categories before assigning them to products. |
| `TAXJAR_SHOW_CUSTOMER` | Show Customer | Tool to show an existing customer. Use when you need to retrieve details of a specific customer via TaxJar API. |
| `TAXJAR_SHOW_ORDER_TRANSACTION` | Show Order Transaction | Tool to show an existing order transaction by ID. Use when you need to retrieve full details of a specific order transaction after creation or listing. |
| `TAXJAR_SHOW_REFUND_TRANSACTION` | Show Refund Transaction | Retrieves detailed information about a specific refund transaction from TaxJar. Use this tool when you need to: - View complete details of a refund transaction including amounts, addresses, and line items - Verify refund transaction data that was previously created - Audit refund information for tax reporting purposes Requires a valid transaction_id that was previously created through TaxJar's API. |
| `TAXJAR_SHOW_TAX_RATES_FOR_A_LOCATION` | Show Tax Rates for a Location | Tool to show sales tax rates for a location. Use when you need to retrieve sales tax rates for a specific ZIP code with optional address details (city, state, country, street). |
| `TAXJAR_SUMMARIZE_TAX_RATES_FOR_ALL_REGIONS` | Summarize Tax Rates for All Regions | Tool to retrieve minimum and average sales tax rates by region. Use when you need a backup of regional tax summary rates. |
| `TAXJAR_UPDATE_CUSTOMER` | Update Customer | Tool to update an existing customer in TaxJar. Use when you need to modify customer details such as exemption type, name, or address information. |
| `TAXJAR_UPDATE_ORDER_TRANSACTION` | Update Order Transaction | Tool to update an existing order transaction. Use when adjusting order details such as amount, shipping, or line items after creation. |
| `TAXJAR_UPDATE_REFUND_TRANSACTION` | Update Refund Transaction | Tool to update an existing refund transaction. Use when adjusting refund details such as amount, shipping, or line items after creation. |
| `TAXJAR_VALIDATE_VAT_NUMBER` | Validate VAT Number | Validates EU VAT identification numbers against the VIES (VAT Information Exchange System) database. Use this tool to: - Verify VAT number format and validity - Check if a VAT number is registered and active in the EU - Retrieve associated company name and address when available - Confirm tax-exempt eligibility before processing transactions The validation queries the European VIES database when available, returning company details for valid registrations. When VIES is unavailable, it falls back to format-based validation using regex patterns. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Taxjar MCP server is an implementation of the Model Context Protocol that connects your AI agents and assistants directly to Taxjar. Instead of manually wiring Taxjar APIs, OAuth, and scopes yourself, you get a structured, tool-based interface that an LLM can call safely.
With Composio's managed implementation, you don't have to create your own developer app. For production, if you're building an end product, we recommend using your own credentials. The managed server helps you prototype fast and go from 0-1 faster.

## Step-by-step Guide

### 1. Prerequisites

You will need:
- A Composio API key
- An OpenAI API key (used by Autogen's OpenAIChatCompletionClient)
- A Taxjar account you can connect to Composio
- Some basic familiarity with Autogen and Python async

### 1. Getting API Keys for OpenAI and Composio

OpenAI API Key
- Go to the [OpenAI dashboard](https://platform.openai.com/settings/organization/api-keys) and create an API key. You'll need credits to use the models, or you can connect to another model provider.
- Keep the API key safe.
Composio API Key
- Log in to the [Composio dashboard](https://dashboard.composio.dev?utm_source=toolkits&utm_medium=framework_docs).
- Navigate to your API settings and generate a new API key.
- Store this key securely as you'll need it for authentication.

### 2. Install dependencies

Install Composio, Autogen extensions, and dotenv.
What's happening:
- composio connects your agent to Taxjar via MCP
- autogen-agentchat provides the AssistantAgent class
- autogen-ext-openai provides the OpenAI model client
- autogen-ext-tools provides MCP workbench support
```bash
pip install composio python-dotenv
pip install autogen-agentchat autogen-ext-openai autogen-ext-tools
```

### 3. Set up environment variables

Create a .env file in your project folder.
What's happening:
- COMPOSIO_API_KEY is required to talk to Composio
- OPENAI_API_KEY is used by Autogen's OpenAI client
- USER_ID is how Composio identifies which user's Taxjar connections to use
```bash
COMPOSIO_API_KEY=your-composio-api-key
OPENAI_API_KEY=your-openai-api-key
USER_ID=your-user-identifier@example.com
```

### 4. Import dependencies and create Tool Router session

What's happening:
- load_dotenv() reads your .env file
- Composio(api_key=...) initializes the SDK
- create(...) creates a Tool Router session that exposes Taxjar tools
- session.mcp.url is the MCP endpoint that Autogen will connect to
```python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio

from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_ext.tools.mcp import McpWorkbench, StreamableHttpServerParams

load_dotenv()

async def main():
    # Initialize Composio and create a Taxjar session
    composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY"))
    session = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["taxjar"]
    )
    url = session.mcp.url
```

### 5. Configure MCP parameters for Autogen

Autogen expects parameters describing how to talk to the MCP server. That is what StreamableHttpServerParams is for.
What's happening:
- url points to the Tool Router MCP endpoint from Composio
- timeout is the HTTP timeout for requests
- sse_read_timeout controls how long to wait when streaming responses
- terminate_on_close=True cleans up the MCP server process when the workbench is closed
```python
# Configure MCP server parameters for Streamable HTTP
server_params = StreamableHttpServerParams(
    url=url,
    timeout=30.0,
    sse_read_timeout=300.0,
    terminate_on_close=True,
    headers={"x-api-key": os.getenv("COMPOSIO_API_KEY")}
)
```

### 6. Create the model client and agent

What's happening:
- OpenAIChatCompletionClient wraps the OpenAI model for Autogen
- McpWorkbench connects the agent to the MCP tools
- AssistantAgent is configured with the Taxjar tools from the workbench
```python
# Create model client
model_client = OpenAIChatCompletionClient(
    model="gpt-5",
    api_key=os.getenv("OPENAI_API_KEY")
)

# Use McpWorkbench as context manager
async with McpWorkbench(server_params) as workbench:
    # Create Taxjar assistant agent with MCP tools
    agent = AssistantAgent(
        name="taxjar_assistant",
        description="An AI assistant that helps with Taxjar operations.",
        model_client=model_client,
        workbench=workbench,
        model_client_stream=True,
        max_tool_iterations=10
    )
```

### 7. Run the interactive chat loop

What's happening:
- The script prompts you in a loop with You:
- Autogen passes your input to the model, which decides which Taxjar tools to call via MCP
- agent.run_stream(...) yields streaming messages as the agent thinks and calls tools
- Typing exit, quit, or bye ends the loop
```python
print("Chat started! Type 'exit' or 'quit' to end the conversation.\n")
print("Ask any Taxjar related question or task to the agent.\n")

# Conversation loop
while True:
    user_input = input("You: ").strip()

    if user_input.lower() in ["exit", "quit", "bye"]:
        print("\nGoodbye!")
        break

    if not user_input:
        continue

    print("\nAgent is thinking...\n")

    # Run the agent with streaming
    try:
        response_text = ""
        async for message in agent.run_stream(task=user_input):
            if hasattr(message, "content") and message.content:
                response_text = message.content

        # Print the final response
        if response_text:
            print(f"Agent: {response_text}\n")
        else:
            print("Agent: I encountered an issue processing your request.\n")

    except Exception as e:
        print(f"Agent: Sorry, I encountered an error: {str(e)}\n")
```

## Complete Code

```python
import asyncio
import os
from dotenv import load_dotenv
from composio import Composio

from autogen_agentchat.agents import AssistantAgent
from autogen_ext.models.openai import OpenAIChatCompletionClient
from autogen_ext.tools.mcp import McpWorkbench, StreamableHttpServerParams

load_dotenv()

async def main():
    # Initialize Composio and create a Taxjar session
    composio = Composio(api_key=os.getenv("COMPOSIO_API_KEY"))
    session = composio.create(
        user_id=os.getenv("USER_ID"),
        toolkits=["taxjar"]
    )
    url = session.mcp.url

    # Configure MCP server parameters for Streamable HTTP
    server_params = StreamableHttpServerParams(
        url=url,
        timeout=30.0,
        sse_read_timeout=300.0,
        terminate_on_close=True,
        headers={"x-api-key": os.getenv("COMPOSIO_API_KEY")}
    )

    # Create model client
    model_client = OpenAIChatCompletionClient(
        model="gpt-5",
        api_key=os.getenv("OPENAI_API_KEY")
    )

    # Use McpWorkbench as context manager
    async with McpWorkbench(server_params) as workbench:
        # Create Taxjar assistant agent with MCP tools
        agent = AssistantAgent(
            name="taxjar_assistant",
            description="An AI assistant that helps with Taxjar operations.",
            model_client=model_client,
            workbench=workbench,
            model_client_stream=True,
            max_tool_iterations=10
        )

        print("Chat started! Type 'exit' or 'quit' to end the conversation.\n")
        print("Ask any Taxjar related question or task to the agent.\n")

        # Conversation loop
        while True:
            user_input = input("You: ").strip()

            if user_input.lower() in ['exit', 'quit', 'bye']:
                print("\nGoodbye!")
                break

            if not user_input:
                continue

            print("\nAgent is thinking...\n")

            # Run the agent with streaming
            try:
                response_text = ""
                async for message in agent.run_stream(task=user_input):
                    if hasattr(message, 'content') and message.content:
                        response_text = message.content

                # Print the final response
                if response_text:
                    print(f"Agent: {response_text}\n")
                else:
                    print("Agent: I encountered an issue processing your request.\n")

            except Exception as e:
                print(f"Agent: Sorry, I encountered an error: {str(e)}\n")

if __name__ == "__main__":
    asyncio.run(main())
```

## Conclusion

You now have an Autogen assistant wired into Taxjar through Composio's Tool Router and MCP. From here you can:
- Add more toolkits to the toolkits list, for example notion or hubspot
- Refine the agent description to point it at specific workflows
- Wrap this script behind a UI, Slack bot, or internal tool
Once the pattern is clear for Taxjar, you can reuse the same structure for other MCP-enabled apps with minimal code changes.

## How to build Taxjar MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/taxjar/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/taxjar/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/taxjar/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/taxjar/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/taxjar/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/taxjar/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/taxjar/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/taxjar/framework/cli)
- [Google ADK](https://composio.dev/toolkits/taxjar/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/taxjar/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/taxjar/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/taxjar/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/taxjar/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/taxjar/framework/crew-ai)

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- [Eagle doc](https://composio.dev/toolkits/eagle_doc) - Eagle doc is an AI-powered OCR API for invoices and receipts. It delivers fast, reliable, and accurate document data extraction for seamless automation.
- [Elorus](https://composio.dev/toolkits/elorus) - Elorus is an online invoicing and time-tracking software for freelancers and small businesses. Easily manage finances, bill clients, and track work in one place.
- [Eodhd apis](https://composio.dev/toolkits/eodhd_apis) - Eodhd apis delivers comprehensive financial data, including live and historical stock prices, via robust APIs. Easily access reliable, up-to-date market insights to power your apps, dashboards, and analytics.
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## Frequently Asked Questions

### What are the differences in Tool Router MCP and Taxjar MCP?

With a standalone Taxjar MCP server, the agents and LLMs can only access a fixed set of Taxjar tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Taxjar and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Autogen?

Yes, you can. Autogen fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Taxjar tools.

### Can I manage the permissions and scopes for Taxjar while using Tool Router?

Yes, absolutely. You can configure which Taxjar scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Taxjar data and credentials are handled as safely as possible.

---
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