Ziptax Sales Tax MCP Server

Real-time US and Canadian sales tax and use tax rates by address or geographic coordinates.

CommunityOnlineAPI key requiredGlobalFreeRead-only

What it can do

  • Get Account Metrics: Get account usage metrics and quota information for the authenticated ZipTax account. Returns current request counts, limits, and entitlements. Requires a valid ZipTax API key via
  • Lookup Tax Rate: Look up sales and use tax rates for a US or Canadian location. Provide a postal code at minimum, or a full address for more precise results. Returns tax rates broken down by jurisdict

What data it sees

Do you need an account

An API key from the service settings is required

Real-time US and Canadian sales tax and use tax rates by address or geographic coordinates.

How to connect

How to connect Ziptax Sales Tax MCP Server to Claude

The server address to paste into Claude settings:

https://sales-tax--ziptax.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Ziptax Sales Tax MCP Server to ChatGPT

The server address to paste into ChatGPT settings:

https://sales-tax--ziptax.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Ziptax Sales Tax MCP Server to Cursor

The server address to paste into Cursor settings:

https://sales-tax--ziptax.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (2)

Raw names from tools/list. Only developers need these.

get_account_metricsGet account usage metrics and quota information for the authenticated ZipTax account. Returns current request counts, limits, and entitlements. Requires a valid ZipTax API key via the X-API-KEY header, Authorization header, or ?key= URL parameter. Get a key at https://platform.zip.tax
lookup_tax_rateLook up sales and use tax rates for a US or Canadian location. Provide a postal code at minimum, or a full address for more precise results. Returns tax rates broken down by jurisdiction (state, county, city, district). Requires a valid ZipTax API key via the X-API-KEY header, Authorization header, or ?key= URL parameter. Get a key at https://platform.zip.tax