TaxJar Connector for AI agents.
10 live capabilities
Automate sales tax calculations and nexus compliance for your e-commerce store.
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Why people use TaxJar
Fix Sales Tax Errors with TaxJar Nexus Verification
This Connector changes that by bringing the data to you. Instead of hunting for info, you just ask your AI client to run the numbers. It pulls the exact rates and nexus status directly from TaxJar, giving you a clear picture of your tax liability without a single extra click.
What Vinkius changes
You get real-time tax data and compliance checks inside your AI chat.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 5,900+ Connectors
- Real-world use case 01
Testing Checkout Logic
A developer wants to see if their new checkout flow handles taxes correctly.
- Real-world use case 02
Nexus Audit
A compliance officer needs to know if they've crossed the threshold in a new state.
- Real-world use case 03
Refund Reconciliation
A finance person needs to match refunds to orders.
Complete set · 10capabilities
The complete TaxJar capability set.
These are the exact actions your AI can choose when you ask it to work with TaxJar.
01—04
4 capabilities in this set.
Part of 10 available through TaxJar.
- 01 Capability
Get tax categories
Lists product tax categories from TaxJar. This helps you understand how different goods are taxed.
- 02 Capability
List tax orders
Lists previously recorded order transactions in TaxJar. Use this to pull a history of past sales.
- 03 Capability
Get tax order details
Retrieves details for a specific order transaction. Use this to see the specifics of a single past sale.
- 04 Capability
Calculate sales tax
Calculates the exact sales tax for a specific order. This provides the final tax amount for a checkout.
05—07
3 capabilities in this set.
Part of 10 available through TaxJar.
- 05 Capability
Get tax rates
Retrieves sales tax rates for a specific ZIP code. This gives you the exact rate for a local area.
- 06 Capability
Get summary tax rates
Retrieves minimum and average tax rates by region. Use this to see broader tax trends.
- 07 Capability
List tax customers
Lists TaxJar customer records and exemptions. Use this to see which customers aren't being charged tax.
08—10
3 capabilities in this set.
Part of 10 available through TaxJar.
- 08 Capability
List nexus regions
Lists regions where the business has tax nexus. This shows you exactly where you're required to collect tax.
- 09 Capability
List tax refunds
Lists previously recorded refund transactions. This helps you track all money returned to customers.
- 10 Capability
Validate tax address
Validates a physical address for tax purposes. Use this to pre-qualify shipping locations.
Set up in minutes
One URL. Then ask TaxJar to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use TaxJar from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it TaxJar, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable TaxJar for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the TaxJar URL.
- Step 03
Save and start
Save the connection and enable TaxJar in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"taxjar": {
"url": "https://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using TaxJar
Open Agent mode in chat and ask: "Using TaxJar, help me...". 10 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"taxjar": {
"url": "https://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using TaxJar
Ask Copilot: "Using TaxJar, help me...". 10 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"taxjar": {
"url": "https://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using TaxJar
Open Cascade and ask: "Using TaxJar, help me...". 10 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"taxjar": {
"url": "https://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using TaxJar
Ask Cline: "Using TaxJar, help me...". 10 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add taxjar --transport http "https://edge.vinkius.com/vk_preview_0dPv0CDpemL9jlVTpnoIhUNavuFEYKlkruwTsPSD/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using TaxJar
Ask Claude: "Using TaxJar, show me...". 10 tools are ready
Where the request belongs
Work TaxJar can move forward.
This is for commerce leads and developers who need to automate tax logic without building custom integrations. It's for the person tired of manual spreadsheet updates for state-by-state tax rules.
Backend Commerce Engineer
Tests checkout endpoints and validates tax logic in the terminal.
Financial Operator
Audits transaction histories and refund logs to find discrepancies.
Risk & Compliance Analyst
Monitors nexus thresholds and manages customer tax exemptions.
Build the capability set
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Bring your own AI
Change the model, client or framework. Keep TaxJar connected.
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Claude -
ChatGPT -
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Cursor -
VS Code -
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Before you connect
Questions about TaxJar.
The practical details behind the request, access and result.
Can the TaxJar MCP calculate sales tax for multiple items?
Yes, it can calculate the exact sales tax for specific orders, including multi-item payloads, by processing the details you provide to your AI client.
How does TaxJar MCP help with tax nexus?
It allows you to instantly query your registered nexus regions. You can quickly see where your business is legally required to collect tax without opening a browser.
Can I use TaxJar MCP to check customer exemptions?
Yes, you can ask your agent to list customer records and exemptions. This helps you verify if a specific client is exempt from tax before finalizing an order.
Does TaxJar MCP support individual ZIP code lookups?
Yes, it can retrieve specific sales tax rates for any ZIP code. This is great for real-time price estimates during the checkout process.
How does TaxJar MCP help with refund tracking?
It allows your agent to pull a list of previously recorded refund transactions. This makes it much easier to reconcile your books and track returned funds.
Can TaxJar MCP validate shipping addresses for tax?
Yes, it can validate physical addresses for tax purposes. This ensures that the shipping data you receive is accurate for tax reporting and compliance.
Can it calculate tax for complex multi-item orders?
Yes. The calculate_sales_tax capability accepts full order payloads including multiple line items, shipping costs, and customer addresses to return precise tax breakdowns.
What are nexus regions?
A nexus is a state or jurisdiction where your business has a tax obligation. Use list_nexus_regions to see where you're registered to collect sales tax.
Does it support sandbox mode?
Yes. TaxJar provides sandbox API tokens for testing. Use a sandbox token to test tax calculations without affecting your live account or generating real transactions.
One connection away
Give your agent a direct line to TaxJar.
Connect TaxJar once. Keep it beside 5,900+ managed Connectors when the next task needs more.
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