TaxJar MCP Server with 12 Tools for Claude, Cursor, and AI Agents
GDPR Free for SubscribersCalculate, collect, and remit sales tax automatically across every US state and jurisdiction with real-time rate accuracy. Vinkius routes your AI agents directly to TaxJar through a governed connection. 12 tools ready to use with Claude, ChatGPT, Cursor, or any AI agent — no hosting, no setup, connect in 30 seconds.
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Compatible with every major AI agent and IDE
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What is the TaxJar MCP Server?
The TaxJar MCP Server routes AI agents like Claude, ChatGPT, and Cursor directly to TaxJar via 12 tools. Calculate, collect, and remit sales tax automatically across every US state and jurisdiction with real-time rate accuracy. Powered by Vinkius — your credentials stay on your side of the connection, every request is auditable. Connect in under 2 minutes.
Built-in capabilities (12)
Tools for your AI Agents to operate TaxJar
Ask your AI agent "Calculate sales tax for a $150 order to NY 10001, USA." and get the answer without opening a single dashboard. With 12 tools connected to real TaxJar data, your agents reason over live information, cross-reference it with other MCP servers, and deliver insights you would spend hours assembling manually.
Works with Claude, ChatGPT, Cursor, and any MCP-compatible client. Powered by Vinkius — your credentials never touch the AI model, every request is auditable. Connect in under two minutes.
Why teams choose Vinkius
One subscription gives you the infrastructure to connect your AI agents to thousands of MCP servers — and deploy your own to the Vinkius Edge. Your credentials stay yours. Your data flows directly between your agent and the API. DLP blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade routing and governance, zero maintenance.
Build your own MCP Server with our secure development framework →The TaxJar App Connector works with every AI agent you already use
…and any MCP-compatible client
Use all 12 TaxJar tools with your AI agents right now
Vinkius routes your AI agents to TaxJar through a governed proxy. Beyond a simple connection, you get full visibility into every action your agents perform, with enterprise-grade security and up to 60% savings on AI costs.
Calculate sales tax on TaxJar
Calculate order tax
Create tax order on TaxJar
Record order transaction
Create tax refund on TaxJar
Record refund
Delete tax order on TaxJar
Remove order record
Get tax account on TaxJar
Get API status
Get tax order on TaxJar
Get order details
Get tax rates on TaxJar
Get rates by ZIP
List nexus regions on TaxJar
List tax nexus
List tax categories on TaxJar
List product types
List tax orders on TaxJar
List order transactions
Update tax order on TaxJar
Modify order record
Validate tax address on TaxJar
Verify address for tax
What the TaxJar MCP Server unlocks
Connect your TaxJar sales tax automation account to any AI agent and simplify how you calculate tax rates, manage jurisdictional nexus, and monitor order compliance through natural conversation.
What you can do
- Precise Tax Calculation — Calculate real-time sales tax for orders based on specific destination addresses and product categories.
- Rate Lookup — Retrieve general sales tax rates for any ZIP code or city to estimate costs instantly.
- Nexus Management — List and monitor regions where your business has a sales tax nexus to ensure compliance.
- Transaction Oversight — Record, update, and manage sales order and refund transactions for automated reporting.
- Address Validation — Verify street addresses to ensure highly accurate tax jurisdiction identification.
- Product Categorization — List TaxJar product categories and codes to apply correct tax exemptions and rates.
How it works
1. Subscribe to this server
2. Enter your TaxJar API Token (found in your account settings)
3. Start managing your sales tax compliance from Claude, Cursor, or any MCP client
Who is this for?
- E-commerce Managers — quickly calculate taxes for custom orders and check nexus status via simple AI commands.
- Finance & Accounting Teams — monitor transaction history and verify sales tax collected directly from the workspace.
- Ops & Logistics — validate shipping addresses and ensure correct product categorization via the AI assistant.
Frequently asked questions about the TaxJar MCP Server
Can I calculate sales tax for a specific address via AI?
Yes! Use the calculate_sales_tax tool. Provide the destination country, zip code, and state along with the order amount. Your agent will return the precise tax to be collected.
How do I see in which states I have a tax nexus?
Run the list_nexus_regions query. The agent will retrieve a list of all regions (states or countries) where you have configured a tax nexus in your TaxJar account.
Is it possible to validate a shipping address via AI?
Absolutely. Use the validate_tax_address tool and provide the full address details. The agent will verify the address through TaxJar to ensure it is accurate for tax purposes.
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We built the connector to TaxJar. Now put your agents to work. Fully governed.
Vinkius is the AI Gateway with managed hosting. Stop building connectors. Every connection runs inside eight layers of security.
Hosted, sandboxed, and live on AWS. You don't provision anything. You don't maintain anything. You connect.
Every tool call, every token, every response. Logged and auditable. Data flows direct from TaxJar to your agent. Nothing is stored on our side. Ever.
Eight governance layers on every request. Sensitive data redacted before it reaches the model. Kill switch if anything goes sideways. Always on.