AgentTax
US sales/use tax, nexus thresholds, capital gains and 1099-DA tools for AI agent transactions.
MCP server · by AgentTax
About
AgentTax is an MCP server published by AgentTax. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
- Secrets: 1
- Settings: 1
Requires: AGENTTAX_API_KEY (secret)
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Package
npm @agenttax/mcp-server (@agenttax/mcp-server on npm)
- npm downloads/week: 644 (2026-10-12)
- npm downloads/month: 644 (2026-10-12)
- Latest version on npm: 1.1.1, published 2026-10-08
- Declared version 1.1.1 is not listed on npm
npm facts come from the public npm registry (registry.npmjs.org, api.npmjs.org). Each figure is the registry's own and is never added to another. A registry that publishes no figure shows none: no number is not zero.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: npm package
Built from what Official MCP Registry declares.
claude mcp add --env "AGENTTAX_API_KEY=<YOUR_AGENTTAX_API_KEY>" --transport stdio agenttax-mcp -- npx -y @agenttax/mcp-server
[mcp_servers.agenttax-mcp]
command = "npx"
args = ["-y", "@agenttax/mcp-server"]
[mcp_servers.agenttax-mcp.env]
AGENTTAX_API_KEY = "<YOUR_AGENTTAX_API_KEY>"
{
"mcpServers": {
"agenttax-mcp": {
"command": "npx",
"args": [
"-y",
"@agenttax/mcp-server"
],
"env": {
"AGENTTAX_API_KEY": "<YOUR_AGENTTAX_API_KEY>"
}
}
}
}
Replace the values in angle brackets with your own. We show the names of the settings, never values.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.1.1 | Downloads/month (npm): 644 Downloads/week (npm): 644 Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Access Avalara AvaTax API for tax calculation, transactions, nexus management, and compliance
-
taxlocus com.taxlocus/taxlocus
US sales tax for AI agents: rates, economic nexus, taxability, filing. Citation-backed.
-
US Sales Tax Nexus Checker (bulk, Apify)
Bulk US sales tax economic nexus checks every state's rule, billed per check via Apify.
-
Avalara Tax Registrations and Business Licenses
Provides access to Avalara Tax Registration and Business Licenses APIs for filings and registrations
-
Provides access to Avalara Global Returns API for tax returns, filing calendars, and compliance data
-
Avalara Developer Documentation
Provides access to Avalara developer documentation, integration guides, and code examples
-
GoAI Moat Cross-Border Tax Compliance
VAT registration, US sales-tax nexus and filing calendars for cross-border sellers
-
opentax io.github.Invaro/opentax
Verifiable US tax oracle for AI agents: cited, machine-checkable federal and state tax computation
-
Read-only US tax reference for notices, deadlines, filing screens, and clearly labeled estimates.
-
US Sales Tax Economic Nexus Check
Which US states must a remote seller register in for sales tax? Every state's nexus rule. Sourced.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Free, open-source US federal tax preparation assistant for Claude Code. Drop your W-2s, 1099s, and crypto exchange CSVs into the workspace — Open Tax parses them, computes your…
-
AI-powered bookkeeping and tax filing for entrepreneurs at the heart of the European economy.
-
AI-native UK accounting for limited companies and sole traders. Track transactions, manage VAT, monitor HMRC deadlines, log expenses, and handle invoices through natural language…
-
Give Claude deep UK accounting knowledge. This plugin replaces the generic finance responses with regulation-aware workflows built specifically for British businesses. It covers…
-
Connect Claude and other AI agents to Merit Aktiva — Estonia's most-used accounting software — and let them handle real bookkeeping safely. Six Claude Code skills that teach…
Has a listing on Claude Code: claude-plugins-official (5)
-
QuickBooks business insights and actions: financial health briefings across P&L, cash flow, balance sheet and A/R, industry benchmarking, payroll cost analysis, overdue-invoice…
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
-
Build Airwallex payment integrations in your own codebase. Generates the checkout, card-element, onboarding, and subscription-billing code for an Airwallex integration and wires…
-
Guides AI assistants that use the NetSuite AI Connector: tool-selection order, output formatting, NetSuite domain knowledge, multi-subsidiary and currency handling, and SuiteQL…
-
PayPal development plugin for Claude — integrate payments, subscriptions, invoices, disputes, and more using PayPal's APIs and MCP server
Has a listing on Claude: knowledge-work-plugins (5)
-
QuickBooks business insights and actions: financial health briefings across P&L, cash flow, balance sheet and A/R, industry benchmarking, payroll cost analysis, overdue-invoice…
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
-
Guides AI assistants that use the NetSuite AI Connector: tool-selection order, output formatting, NetSuite domain knowledge, multi-subsidiary and currency handling, and SuiteQL…
-
Director-level finance analysis on live NetSuite data: financial reporting, period close, variance, aging and reconciliation reviews, cash reporting, and board-ready narratives…
-
Streamline finance and accounting workflows, from journal entries and reconciliation to financial statements and variance analysis. Speed up audit prep, month-end close, and…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Develop your payments integration faster with the ability to create products, prices, and payment links directly in ChatGPT. Run your business from ChatGPT with the ability to…
-
Shopify for ChatGPT makes store building and management as easy as having a conversation. Effortlessly connect your existing store or create a new online store by describing your…
-
Public equity investing workflows for listed-company research, earnings analysis, valuation, model updates, long/short pitches, catalysts, thesis tracking, ETF/index and…
-
Bring operational data and context into the flow of your ChatGPT conversations. You can ask questions, create and update records, and analyze your data—all through conversation…
-
Answer product and business questions with data
Has a listing on Community GitHub marketplaces (5)
-
Bring Airwallex's global financial infrastructure to Claude. Orchestrate actions across your account in plain language, e.g., set up invoices from a PO, onboard suppliers from…
-
Build Airwallex payment integrations in your own codebase. Generates the checkout, card-element, onboarding, and subscription-billing code for an Airwallex integration and wires…
-
Carta Cap Table plugin — skills and hooks for querying cap tables, grants, SAFEs, 409A valuations, waterfall scenarios, and more
-
Deprecated — renamed to airwallex-agentos. Run: /plugin install airwallex-agentos
-
Carta Investors plugin — skills for querying investor data, performance benchmarks, regulatory reporting, AGM deck generation, brand extraction, and more via the Carta MCP Server.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Accept payments and grow your business. Stripe's agent plugin includes best practices, upgrade guidance, and our MCP server.
-
Three-layer verification pipeline for AI output. Extracts claims, finds sources, and flags hallucination risks so humans can verify before acting.
-
Read-only Azure cost, forecasts, budget alerts, Advisor recommendations, and AI billing analysis in a Copilot canvas.
-
Visualizes live session AI-credit usage as a Pac-Man board with pellets, ghosts, fruit milestones, and game-over limits.
-
See your local Copilot token usage by day, model, and session, and get tips to use it more efficiently.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
workiq
Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
-
workiq-productivity
WorkIQ productivity skills powered by the local WorkIQ CLI — read-only insights across email, meetings, calendar, Teams, SharePoint, projects, and people.
-
mobile-app
Build and deploy Power Apps code apps for mobile using Expo (React Native), with native device functionality and Power Platform connectors
Has a listing on Cursor: cursor/plugins (5)
-
Read and write invoices, contacts, reports, and payroll.
-
Read invoices, bills, expenses, customers, accounts, and financial reports.
-
Query expenses, receipts, bills, cards, and travel.
-
Work with payments, orders, catalog, customers, and invoices.
-
Query expenses, travel bookings, policies, and cards.
Has a listing on Docker MCP Catalog (5)
Has a listing on Official MCP Registry (5)
-
Access Avalara AvaTax API for tax calculation, transactions, nexus management, and compliance
-
taxlocus com.taxlocus/taxlocus
US sales tax for AI agents: rates, economic nexus, taxability, filing. Citation-backed.
-
US Sales Tax Nexus Checker (bulk, Apify)
Bulk US sales tax economic nexus checks every state's rule, billed per check via Apify.
-
Avalara Tax Registrations and Business Licenses
Provides access to Avalara Tax Registration and Business Licenses APIs for filings and registrations
-
Provides access to Avalara Global Returns API for tax returns, filing calendars, and compliance data
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.