Arc & Ledger Tax Reference is a remote MCP server that gives an AI agent 13 tools, among them check_5472_obligation, check_fbar_fatca, check_itin_eligibility. It answers at https://mcp.arcandledger.com/directory/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 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.
Read-only US tax reference for notices, deadlines, filing screens, and clearly labeled estimates.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_5472_obligation | Use to screen common Form 5472 triggers for a foreign-owned US disregarded entity or corporation. The result is a general filing screen and does not prepare or file the form. Inputs: entity_type, foreign_owned, had_reportable_transaction, formed_in_us |
check_fbar_fatca | Use to screen general FBAR and Form 8938 thresholds from aggregate balance, filing status, residence, and account-count facts. Do not request account numbers, institution names, or statements. Inputs: max_aggregate_foreign_balance_usd, filing_status, lives_abroad, account_count, unfiled_years |
check_itin_eligibility | Use to screen general ITIN reason categories, whether a return is commonly attached, and supporting-document requirements. Never request or process an actual ITIN, passport, or identity document. Inputs: has_ssn, reason, is_foreign_national |
check_resolution_options | Use to screen general IRS payment and collection alternatives from a rough balance, filing-compliance status, ability-to-pay category, and coarse tax-account type when known. This is an educational fit screen, not a promise that the IRS wil Inputs: balance_owed_usd, all_required_returns_filed, tax_account_type, ability_to_pay, balance_includes_penalties, brief |
check_treaty_withholding | Use to explain general US withholding rules, documentation, and supported US-Turkey treaty rates for a payment category. Treaty eligibility and source rules depend on the full facts. Inputs: income_type, payee_country, payee_type |
deadline_calendar | Use to return common federal filing and payment dates for a selected filer or entity type. The user must verify the date for weekends, holidays, extensions, fiscal years, and special facts. Inputs: entity_type, filing_year, has_us_source_wages, has_foreign_bank_over_10k, formed_in_us |
decode_irs_notice | Use when a user provides the code from an IRS notice or letter and wants a general explanation, the usual response window, or the next procedural step. Do not request the notice itself or any taxpayer identifier. Inputs: notice_code, received_date, amount_shown, brief |
estimate_accountable_plan | Use to estimate potentially reimbursable business expenses under an accountable-plan scenario, including the split 2026 business-mileage rates. The result does not establish a plan or determine substantiation. 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 to screen the fewer-than-15-days home-rental rule under IRC 280A(g) and calculate conditional amounts. Keep the owner-side income exclusion separate from the business-side requirements for ordinary and necessary use and reasonable rent. Inputs: fair_daily_rental_rate_usd, days_rented, marginal_tax_rate_pct |
estimate_irs_penalty | Use to estimate selected federal failure-to-file, failure-to-pay, and underpayment amounts from nonidentifying figures. The result is an estimate and does not replace an IRS account transcript. Inputs: balance_owed_usd, months_late, return_filed |
estimate_quarterly_taxes | Use to estimate federal quarterly tax payments from nonidentifying income, entity, withholding, and prior-year tax figures. Return the assumptions, safe-harbor context, and due dates. Inputs: ytd_net_income_usd, entity, state, ytd_withholding_usd, prior_year_total_tax_usd, prior_year_agi_usd |
estimate_rental_income | Use to estimate a basic rental-income result from nonidentifying figures and identify the modeled depreciation, passive-loss, and personal-use limitations. Inputs: annual_rental_income_usd, operating_expenses_usd, property_purchase_price_usd, land_percent, other_income_usd, filing_status |
explain_tax_document | Use when a user names a US tax form or information document and wants to understand its purpose, common fields, or usual return treatment. Do not request or accept the document itself. Inputs: document, brief |
Every block below points at https://mcp.arcandledger.com/directory/mcp. Pick your client and copy.
claude mcp add --transport http arc-ledger-tax-reference https://mcp.arcandledger.com/directory/mcp
{
"mcpServers": {
"arc-ledger-tax-reference": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.arcandledger.com/directory/mcp"]
}
}
}{
"mcpServers": {
"arc-ledger-tax-reference": {
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"servers": {
"arc-ledger-tax-reference": {
"type": "http",
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"context_servers": {
"arc-ledger-tax-reference": {
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-reference": {
"serverUrl": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-reference": {
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}name: Arc & Ledger Tax Reference
version: 0.0.1
schema: v1
mcpServers:
- name: Arc & Ledger Tax Reference
type: streamable-http
url: https://mcp.arcandledger.com/directory/mcp{
"mcpServers": {
"arc-ledger-tax-reference": {
"httpUrl": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-reference": {
"type": "http",
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}{
"mcpServers": {
"arc-ledger-tax-reference": {
"url": "https://mcp.arcandledger.com/directory/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.arcandledger.com%2Fdirectory%2Fmcp&type=streamable_http&id=arc-ledger-tax-reference&name=Arc%20%26%20Ledger%20Tax%20Reference
It answered our last check on 17 October 2026 in 231 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by arcandledger.com and served from mcp.arcandledger.com, the vendor's own domain: https://mcp.arcandledger.com/directory/mcp.
13, as returned by the server's own tools/list on 10 September 2026: check_5472_obligation, check_fbar_fatca, check_itin_eligibility, check_resolution_options, check_treaty_withholding, deadline_calendar, decode_irs_notice, estimate_accountable_plan, and 5 more.
It answered our last check on 17 October 2026 in 231 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.arcandledger.com/directory/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: com.arcandledger. Endpoint host: mcp.arcandledger.com. ARD identifier: urn:air:com.arcandledger:mcp:tax-tools.
First indexed 31 August 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.