Vinkius

TaxJar MCP. Automate US sales tax calculation and compliance.

TaxJar MCP handles sales tax across all US states and jurisdictions. Use this MCP to automatically calculate, collect, and record sales tax on every order, no matter where it ships. It manages complex rules like jurisdictional nexus and verifies addresses in real time so you always stay compliant with fluctuating state laws.

TaxJar MCP is compatible with Claude Claude
TaxJar MCP is compatible with ChatGPT ChatGPT
TaxJar MCP is compatible with Cursor Cursor
TaxJar MCP is compatible with Gemini Gemini
TaxJar MCP is compatible with Windsurf Windsurf
TaxJar MCP is compatible with VS Code VS Code
TaxJar MCP is compatible with JetBrains JetBrains
TaxJar MCP is compatible with Vercel Vercel
See Vinkius in Action

Give Claude and any AI agent real-world access

Calculate real-time sales tax

You tell the system an order total and a shipping address, and it returns the exact calculated sales tax amount.

Verify addresses for tax jurisdiction

The MCP checks if a given street address is valid and determines the correct tax rules for that specific location.

Manage order and refund transactions

It can create, update, delete, or retrieve records for sales orders and subsequent refunds to keep your ledger accurate.

Monitor tax compliance regions

You ask the MCP where your business has a 'nexus,' and it lists all required states for you to stay legally compliant.

Lookup general sales tax rates

It can retrieve standard sales tax rates just by knowing a ZIP code or city name, helping with cost estimates.

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AI Agent
TaxJar

What AI agents can do with TaxJar: 12 Tools for Compliance Management

Use these twelve tools to manage everything from calculating rates by ZIP code to recording complex refund transactions in a single place.

Make your AI actually useful.

Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.

Start using TaxJar MCP

Calculate Sales Tax

Calculates the precise sales tax amount for a given order total and location.

Create Tax Order

Records a new sale transaction into your system's compliance history.

Create Tax Refund

Logs a recorded refund against a previous order, managing the tax liability change.

Delete Tax Order

Removes an existing sales order record from your system's transaction history.

Get Tax Account

Checks the current status and general API connectivity of your tax account.

Get Tax Order

Retrieves all specific details for a single, existing sales order record.

Get Tax Rates

Fetches the current state and local tax rates based on a provided ZIP code.

List Tax Categories

Lists all product categories recognized by your account, helping apply correct...

List Nexus Regions

Retrieves a list of geographical regions where you currently have sales tax...

List Tax Orders

Gets a summary listing of multiple past and current order transactions.

Update Tax Order

Modifies existing details on an order, such as correcting tax rates or amounts after...

Validate Tax Address

Checks a shipping address to confirm its accuracy and determine the correct tax jurisdiction.

Security and governance baked right in.

Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.

TaxJar MCP is compatible with Claude

Claude AI

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.

2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL:

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.

3

Start a conversation

Open a new chat. The TaxJar integration is available immediately — no restart needed.

Choose How to Get Started

Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.

Build Your Own

Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.

  • Import from OpenAPI, Swagger, or YAML specs
  • Create Agent Skills with progressive disclosure
  • Deploy to edge with MCPFusion framework
  • Built in DLP, auth, and compliance on each call
  • Real time usage dashboard and cost metering
  • Publish to catalog or keep private
Start building

Make Your AI Do More

Start with TaxJar, then connect any of our 5,200+ other servers whenever your AI needs more. One click, no limits.

  • Use this MCP plus 5,200+ others, all in one place
  • Add new capabilities to your AI anytime you want
  • Connections are secured and governed automatically
  • Track usage and costs across all your servers
  • Works with Claude, ChatGPT, Cursor, and more
  • New servers added to the catalog weekly
TaxJar MCP server cover

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by TaxJar. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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The headache of state sales tax rates

Today, calculating taxes for an online order feels like navigating a maze. You have to check the destination ZIP code against a constantly shifting web of state, county, and local rules. Then you calculate it in one tab, verify the address in another, and finally manually log the entire process into your accounting software—a tedious cycle that invites human error.

With this MCP, the whole thing collapses into a single conversation with your agent. You just ask for the tax rate for an order to 90210, CA, and you get the precise answer instantly. Your system automatically handles the complex cross-referencing of state rules; you just get the accurate number.

TaxJar MCP: Compliance from a single source

You no longer have to jump between separate tax calculation tools, address validators, and order management sheets. The agent pulls all this data together for you.

The result is an automated compliance workflow. You stop worrying about *if* the tax was correct, and start focusing on growing your business.

What TaxJar MCP does for your AI

Running an e-commerce business means wrestling with a massive headache: state sales tax. Tax rates change constantly, sometimes hourly, depending on the destination ZIP code and product type. You don't have to memorize every rule for California, New York, or any other jurisdiction.

This MCP connects your existing sales tax account directly to your agent. Instead of manually checking rate tables or running complex scripts, you simply ask your AI client what the tax should be for a new order. It instantly calculates the precise real-time rate and verifies that the shipping address is valid for tax purposes.

Furthermore, if an order gets returned, it processes the refund automatically. All compliance tracking—from monitoring where you have physical nexus to logging every transaction—is available through natural conversation. By connecting this MCP via Vinkius, your agent handles all the heavy lifting, keeping your books accurate and preventing costly oversights.

Built · Hosted · Managed by Vinkius TaxJar-MCP - Automate US Sales Tax Calculation
Server ID 019dd16f-1f10-7307-8bc1-018b5309fa26
Vinkius Inspector
Compliance Grade A+
Score 100/100
Vinkius Inspector Badge — Score 100/100

Frequently asked questions about TaxJar MCP

How does TaxJar MCP help with nexus management? +

It helps by listing_nexus_regions. This tool tells you exactly which states are monitoring your sales activity, ensuring you never accidentally operate in a non-compliant zone.

Can I use TaxJar MCP for refunds? +

Yes, you can record tax adjustments using the create_tax_refund tool. This logs the refund correctly against the original order, keeping your books balanced.

What if I change an order after it's created? +

You use the update_tax_order tool to modify existing records. It manages changes to tax rates or amounts and keeps a clean audit trail for you.

Does TaxJar MCP just calculate taxes, or can it handle orders too? +

It handles both. You use the calculate_sales_tax tool for rates, but you also use create_tax_order to record the final transaction into your system.

Is validate_tax_address always necessary? +

While it's best practice, especially when launching in new regions. It guarantees that the address provided is valid for tax purposes before you process anything.