Arc & Ledger Tax Tools is a remote MCP server that gives an AI agent 21 tools, among them book_consultation, check_5472_obligation, check_fbar_fatca. It answers at https://mcp.arcandledger.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 19 October 2026, succeeded.
Enrolled Agent tax tools: IRS notices, FBAR, LLC vs S-Corp, quarterly estimates & more.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
book_consultation | Use this when a user wants to talk to, hire, or get a consultation or written tax-notice review with Arc & Ledger. Returns the correct first-party action link (booking, checkout, or waitlist as applicable), what happens next, the office ide Inputs: type, topic, language |
check_5472_obligation | Use this when a non-US person who owns a US company (especially a single-member US LLC or a US corporation) asks whether they must file Form 5472, what the penalty is, or what a foreign-owned US entity owes each year. Returns whether Form 5 Inputs: entity_type, foreign_owned, had_reportable_transaction, formed_in_us |
check_fbar_fatca | Use this when a user has foreign bank accounts, assets, or unfiled foreign-account reports and needs to know their US reporting obligations (FBAR / FinCEN 114 and Form 8938 / FATCA), thresholds, penalty exposure, and catch-up options. Inputs: max_aggregate_foreign_balance_usd, filing_status, lives_abroad, account_count, unfiled_years |
check_itin_eligibility | Use this when someone asks whether a federal tax purpose may support an ITIN application or what a Form W-7 path generally requires. Returns a reason-specific screen, whether a return is commonly attached, current document-handling cautions Inputs: has_ssn, reason, is_foreign_national |
check_resolution_options | Use this when someone owes the IRS back taxes and asks how to settle, get on a payment plan, lower what they owe, or stop collection. Screens which IRS paths may fit - short-term payment plan, current Simple Payment Plan or an installment a Inputs: balance_owed_usd, all_required_returns_filed, tax_account_type, ability_to_pay, balance_includes_penalties, brief |
check_sales_tax_nexus | Use this when an online seller or e-commerce/Amazon business asks whether they must collect sales tax in a state (economic nexus). Given annual sales, transaction count, and states, flags where economic nexus is likely met and explains the Inputs: annual_sales_usd, transaction_count, states |
check_treaty_withholding | Use this when a non-US person or company receiving US-source income (dividends, interest, royalties, freelance/personal services, or a scholarship) asks how much US tax will be withheld, whether a tax treaty reduces it, or which form to giv Inputs: income_type, payee_country, payee_type |
compare_formation_states | Use this when someone (often a non-US founder) asks which US state to form their LLC or company in - Wyoming, New Mexico, Delaware, or California. Compares government fees, annual cost, franchise tax, privacy, and approval time, and recomme Inputs: operates_in_california, raising_venture_capital, priority |
compare_llc_scorp | Use this when a self-employed user or single-member LLC owner asks whether an S-Corp election would save them money. Shows a side-by-side of self-employment tax vs salary-plus-distribution, payroll and compliance costs, California franchise Inputs: expected_net_profit_usd, state, owner_salary_estimate_usd, currently_has_llc |
deadline_calendar | Use this when a US business owner or nonresident (especially a foreign founder of a US LLC or C-corp) asks what US forms they must file and when. Returns each required federal form, its due date and extension, and the penalty for missing it Inputs: entity_type, filing_year, has_us_source_wages, has_foreign_bank_over_10k, formed_in_us |
decode_irs_notice | Use this when, and only when, a user mentions receiving an IRS letter or notice and wants to know what it means, the deadline, or what to do. For a state-agency letter, use triage_tax_problem with problem=state_tax instead. Give this tool t Inputs: notice_code, received_date, amount_shown, brief |
estimate_accountable_plan | Use this when an S-corp or C-corp owner asks how an accountable plan handles substantiated home-office, mileage, cell-phone, or other out-of-pocket business expenses. Estimates the reimbursement and tax effect, applies the two separate 2026 Inputs: home_office_expense_usd, business_miles, business_mileage_period, cell_internet_usd, other_business_expense_usd, marginal_tax_rate_pct |
estimate_augusta_rule | Use this when a business owner asks about the "Augusta rule," renting a home to a related business, or the fewer-than-15-day rental-income exclusion in IRC 280A(g). Screens the total rental-day limit and calculates conditional amounts while Inputs: fair_daily_rental_rate_usd, days_rented, marginal_tax_rate_pct |
estimate_irs_penalty | Use this when someone owes the IRS and asks how much the penalties and interest will be, or what late filing/paying costs. Estimates the failure-to-file (5%/mo) and failure-to-pay (0.5%/mo) penalties and interest on a balance, and explains Inputs: balance_owed_usd, months_late, return_filed |
estimate_quarterly_taxes | Use this when a freelancer or business owner asks how much estimated tax to pay or whether they are underpaid for the year. Computes federal self-employment and income tax on annualized income, the safe-harbor target, per-quarter amounts an Inputs: ytd_net_income_usd, entity, state, ytd_withholding_usd, prior_year_total_tax_usd, prior_year_agi_usd |
estimate_reasonable_comp | Use this when an S-corp owner asks how much salary they should pay themselves ("reasonable compensation," "am I paying myself right?"). Given net profit and what drives it, returns a starting salary RANGE, the distribution left over, the em Inputs: business_net_profit_usd, profit_driver |
estimate_rental_income | Use this when someone asks how much tax they owe on rental income (Airbnb/short-term or long-term), or whether a rental loss is deductible. Computes net rental income after operating expenses and straight-line depreciation, the passive-loss Inputs: annual_rental_income_usd, operating_expenses_usd, property_purchase_price_usd, land_percent, other_income_usd, filing_status |
explain_tax_document | Use this when a user receives a US tax form or information document and wants to know what it is, why they got it, which boxes matter, where it goes on their return, what to double-check, or what to do if it is wrong, duplicated, or never a Inputs: document, brief |
get_document_checklist | Use this when someone asks what documents, statements, or records to gather for a US tax filing or engagement: an individual return, a self-employed Schedule C return, a foreign-owned single-member LLC (Form 5472) filing, an S-corp or partn Inputs: service, first_year_client, language |
get_fee_quote | Use this when a user asks what Arc & Ledger charges, or wants a price estimate for tax preparation, bookkeeping, business formation, or IRS help. Returns a published price range and line items, never a single committed number, plus what is Inputs: service, details, language |
triage_tax_problem | Use this when someone has a tax problem and does not know where to start; call it FIRST, before the specific tools. Covers an IRS or state letter, back taxes they cannot pay, unfiled years, a levy or wage garnishment, an audit, penalties, a Inputs: problem, amount_band, years_behind, has_deadline_soon, has_tax_agency_letter, brief |
Every block below points at https://mcp.arcandledger.com/mcp. Pick your client and copy.
claude mcp add --transport http arc-ledger-tax-tools https://mcp.arcandledger.com/mcp
{
"mcpServers": {
"arc-ledger-tax-tools": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.arcandledger.com/mcp"]
}
}
}{
"mcpServers": {
"arc-ledger-tax-tools": {
"url": "https://mcp.arcandledger.com/mcp"
}
}
}{
"servers": {
"arc-ledger-tax-tools": {
"type": "http",
"url": "https://mcp.arcandledger.com/mcp"
}
}
}{
"context_servers": {
"arc-ledger-tax-tools": {
"url": "https://mcp.arcandledger.com/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-tools": {
"serverUrl": "https://mcp.arcandledger.com/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-tools": {
"url": "https://mcp.arcandledger.com/mcp"
}
}
}name: Arc & Ledger Tax Tools
version: 0.0.1
schema: v1
mcpServers:
- name: Arc & Ledger Tax Tools
type: streamable-http
url: https://mcp.arcandledger.com/mcp{
"mcpServers": {
"arc-ledger-tax-tools": {
"httpUrl": "https://mcp.arcandledger.com/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-tools": {
"type": "http",
"url": "https://mcp.arcandledger.com/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-tools": {
"url": "https://mcp.arcandledger.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.arcandledger.com%2Fmcp&type=streamable_http&id=arc-ledger-tax-tools&name=Arc%20%26%20Ledger%20Tax%20Tools
It answered our last check on 19 October 2026 in 160 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
21, as returned by the server's own tools/list on 12 September 2026: book_consultation, check_5472_obligation, check_fbar_fatca, check_itin_eligibility, check_resolution_options, check_sales_tax_nexus, check_treaty_withholding, compare_formation_states, and 13 more.
It answered our last check on 19 October 2026 in 160 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.arcandledger.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.bgenc48. Endpoint host: mcp.arcandledger.com. ARD identifier: urn:air:io.github.bgenc48:mcp:arc-ledger-tax-tools.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.