US Sales Tax Economic Nexus Check
Check which US states your remote business must register for sales tax based on your sales volume.
Determines which US states a remote seller must register for sales tax collection based on economic nexus thresholds. Covers 45 sales tax states plus DC with current thresholds, transaction limits, and registration deadlines. Tracks threshold changes over time.
Try asking Muse: "Tell me which states I need to register for sales tax if I had $500,000 in sales and 2,000 orders last year."
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Source: Found in the official MCP Registry (io.github.Nero-Engine/us-sales-tax-nexus) · First listed October 28, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 43 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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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://us-sales-tax-nexus.nerolabs.workers.dev/mcpNot 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
US Sales Tax Economic Nexus Check 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://us-sales-tax-nexus.nerolabs.workers.dev/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 81ms. 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 · 4
list_capabilitiesLists coverage (45 sales tax states plus DC, and the 5 states with no statewide sales tax), the date the data was last checked, and related Nero Labs Rules servers. Free.check_economic_nexusChecks which US states a remote seller (no office, staff or stock in the state) must register in to collect sales tax, from its sales into each state. Give sales_by_state with the dollar sales and number of transactions (orders) per state, the period those figures cover, and whetlist_nexus_thresholdsLists the economic nexus threshold of every US sales tax state (or one state) on a date: dollar and transaction thresholds, and/or logic, measurement period, what counts, marketplace rules, when to register and the official source. Also lists the states with no statewide sales talist_upcoming_nexus_changesLists economic nexus threshold changes in a date window (for example states dropping the 200 transaction test), soonest first, with the old and new rule and source. Use a past from_date to see recent changes. Free.Recent checks
Link
https://us-sales-tax-nexus.nerolabs.workers.dev/mcpQuestions about US Sales Tax Economic Nexus Check in Muse
How do I connect US Sales Tax Economic Nexus Check to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use US Sales Tax Economic Nexus Check to help me. It is a free service with an MCP server at https://us-sales-tax-nexus.nerolabs.workers.dev/mcp. It does not need an API key. 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 US Sales Tax Economic Nexus Check working right now?
At the last check (October 29, 2026, 11:16 UTC) the endpoint was working, answering in 81ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is US Sales Tax Economic Nexus Check 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 US Sales Tax Economic Nexus Check do in Muse?
It exposes 4 tools, including list_capabilities, check_economic_nexus, list_nexus_thresholds, list_upcoming_nexus_changes. For example, you could ask Muse: "Tell me which states I need to register for sales tax if I had $500,000 in sales and 2,000 orders last year."
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This listing was added from public sources (Found in the official MCP Registry (io.github.Nero-Engine/us-sales-tax-nexus)). If you build US Sales Tax Economic Nexus Check, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/us-sales-tax-economic-nexus-check"><img src="https://musedirectory.ai/badge/us-sales-tax-economic-nexus-check.svg" alt="US Sales Tax Economic Nexus Check on musedirectory.ai" width="236" height="40"></a>