MCP server

US Sales Tax Economic Nexus Check

io.github.Nero-Engine/us-sales-tax-nexus

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkAbout 1,016 tokens per request once connected4 tools

Website

https://us-sales-tax-nexus.nerolabs.workers.dev/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 4
Token cost: About 1,016 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http us-sales-tax-nexus https://us-sales-tax-nexus.nerolabs.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.us-sales-tax-nexus]
url = "https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"us-sales-tax-nexus":{"httpUrl":"https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"us-sales-tax-nexus":{"url":"https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"}}}

VS Code

{"servers":{"us-sales-tax-nexus":{"type":"http","url":"https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"}}}

Antigravity

agy mcp add us-sales-tax-nexus https://us-sales-tax-nexus.nerolabs.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"us-sales-tax-nexus","server_url":"https://us-sales-tax-nexus.nerolabs.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"us-sales-tax-nexus","server_url":"https://us-sales-tax-nexus.nerolabs.workers.dev/mcp"}

Tools

check_economic_nexus ~626 tokens
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 sal
list_capabilities ~84 tokens
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.
list_nexus_thresholds ~167 tokens
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.
list_upcoming_nexus_changes ~139 tokens
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.

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