# US Sales Tax Economic Nexus Check Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## US Sales Tax Economic Nexus Check

Check which US states your remote business must register for sales tax based on your sales volume.

- Record: https://musedirectory.ai/connector/us-sales-tax-economic-nexus-check
- Category: Finance & Bills
- Developer: Nero Labs (https://us-sales-tax-nexus.nerolabs.workers.dev/)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 81ms, checked 2026-10-29T11:16:02Z
- Endpoint: https://us-sales-tax-nexus.nerolabs.workers.dev/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T13:31:26Z)
- Source: Found in the official MCP Registry (io.github.Nero-Engine/us-sales-tax-nexus) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.Nero-Engine%2Fus-sales-tax-nexus

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.

Example request: "Tell me which states I need to register for sales tax if I had $500,000 in sales and 2,000 orders last year."

How to connect: 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.

Tools:
- list_capabilities: Lists 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_nexus: Checks 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 whet
- list_nexus_thresholds: Lists 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 ta
- list_upcoming_nexus_changes: Lists 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.

Screening checks:
- MCP handshake: pass (Answered in 122ms)
- Domain against threat feeds (Cloudflare security DNS): pass (us-sales-tax-nexus.nerolabs.workers.dev not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (4 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (No redirects off the domain)
- AI review of purpose and tool behavior: pass (No concerns)