Taxlocus is answering right now. Last checked 4 min ago. Last commit 1 Nov 2026.
US sales tax for AI agents: rates, economic nexus, taxability, filing. Citation-backed.
Today is the operative word: we check Taxlocus every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.
claude mcp add taxlocus --transport http https://api.taxlocus.com/mcp
https://api.taxlocus.com/mcp
[mcp_servers.taxlocus]
url = "https://api.taxlocus.com/mcp"
{
"mcpServers": {
"taxlocus": {
"url": "https://api.taxlocus.com/mcp"
}
}
}
{
"servers": {
"taxlocus": {
"type": "http",
"url": "https://api.taxlocus.com/mcp"
}
}
}
This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://api.taxlocus.com/mcp | streamable-http | sign-in | 384 ms | 4 min ago |
Bulk US sales tax economic nexus checks every state's rule, billed per check via Apify.
Which US states must a remote seller register in for sales tax? Every state's nexus rule. Sourced.
Fabrication-free, DOI-backed citations for AI agents — real openAlex sources, never hallucinated.
Evidence-backed web research for AI agents with citations and confidence scores.
Economic protocol for AI agents — identity + reputation + credit + Sybil resistance (MCP bridge)
Indonesian and ASEAN economic data for AI agents: inflation, CPI, GDP, and FX rates vs IDR.
Macroeconomic and market data for AI agents: rates, credit, volatility, calendars and screeners.
Research-backed lint + generation for agent context files (CLAUDE.md, AGENTS.md) + prompt enhancer.
Answers built from our own checks of this server.