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US Sales Tax Economic Nexus Check MCP Server

by nero-engine Your server? Claim it
answering

US Sales Tax Economic Nexus Check is answering right now. Last checked 8 min ago. It exposes 4 tools.

Which US states must a remote seller register in for sales tax? Every state's nexus rule. Sourced.

Uptime history 27 hours of history
27 hours agonow
100.0%
Uptime 24h
92 of 92 checks
4
Tools
read from the server
58 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check US Sales Tax Economic Nexus Check every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add us-sales-tax-nexus --transport http https://us-sales-tax-nexus.nerolabs.workers.dev/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "us-sales-tax-nexus": {
      "url": "https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.us-sales-tax-nexus]
url = "https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "us-sales-tax-nexus": {
      "url": "https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "us-sales-tax-nexus": {
      "url": "https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

capabilities
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.
economic
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 whether they include sales made through marketplaces such as Amazon or Etsy. Returns states where the seller is over the economic nexus threshold (must register), states close to it (80 percent or more), states under it, and for each the threshold, the measurement period the state uses, what sales count (gross, retail or taxable only), whether marketplace sales count, when registration must happen, and the state revenue department source. Unclear cases give the SAFE answer (treated as over) with what it depends on. Free.
nexus
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 tax. Free.
upcoming
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.

Endpoints

URLTransportStateLatencyChecked
https://us-sales-tax-nexus.nerolabs.workers.dev/mcp streamable-http answering 49 ms 8 min ago

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US Sales Tax Economic Nexus Check — questions

Answers built from our own checks of this server.

What can US Sales Tax Economic Nexus Check do?
It exposes 4 tools, read directly from the server on our last check. Among them: check_economic_nexus, list_capabilities, list_nexus_thresholds, list_upcoming_nexus_changes. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is US Sales Tax Economic Nexus Check working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 58 ms. The bar chart above shows every period we have measured.
How do I connect US Sales Tax Economic Nexus Check?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does US Sales Tax Economic Nexus Check need an API key?
No. US Sales Tax Economic Nexus Check completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is US Sales Tax Economic Nexus Check?
It answers our handshake in 58 ms on average, which is faster than 93% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.