Ziptax Sales Tax API
Look up real-time US and Canadian sales tax rates by address or coordinates.
Connects to ZipTax to retrieve current sales and use tax rates for any US or Canadian location. Muse can help small business owners and sellers calculate correct tax obligations by address, postal code, or GPS coordinates.
Try asking Muse: "What's the sales tax rate for an order shipping to 123 Main Street, Portland, Oregon?"
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Source: Found in the official MCP Registry (tax.zip/ziptax) · First listed October 28, 2026
Last 24 hours
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Is it safe to connect?
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.zip-tax.com/Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
Ziptax Sales Tax API is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://mcp.zip-tax.com/What people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 340ms. Worked in 100% of checks over 30 days.
Screening · October 28, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 2
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 sent in the X-API-KEY header or Authorization header. Get a key at https://platform.zip.taxlookup_tax_rateLook up sales and use tax rates for a US or Canadian location. Provide a full street address for door-level accuracy, or a lat/lng pair for a geographic point lookup. Returns tax rates broken down by jurisdiction (state, county, city, district). Requires a valid ZipTax API key seRecent checks
Link
https://mcp.zip-tax.com/Questions about Ziptax Sales Tax API in Muse
How do I connect Ziptax Sales Tax API to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Ziptax Sales Tax API to help me. It is a free service with an MCP server at https://mcp.zip-tax.com/. It needs an API key from ZipTax; ask me to enter it through your secure credential prompt. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Ziptax Sales Tax API working right now?
At the last check (October 29, 2026, 10:01 UTC) the endpoint was working, answering in 340ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is Ziptax Sales Tax API safe to connect to Muse?
It was screened on October 28, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Ziptax Sales Tax API do in Muse?
It exposes 2 tools, including get_account_metrics, lookup_tax_rate. For example, you could ask Muse: "What's the sales tax rate for an order shipping to 123 Main Street, Portland, Oregon?"
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