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Arc & Ledger Tax Tools

REMOTE · MCP.ARCANDLEDGER.COM · SCANNED SEP 20

Enrolled Agent tax tools: IRS notices, FBAR, LLC vs S-Corp, quarterly estimates & more.

0 this week 86 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security74
Transport & Reachability100
Schema Quality & AI Usability79
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 6281 tokens (~216/item across 29 items; 21 tools + 8 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
  • No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 99% of tool parameters carry a description.Partial
  • Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 21 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 23 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
  • Supports UI / widget rendering.Pass
Install

How do I install the Arc & Ledger Tax Tools MCP server?

Arc & Ledger Tax Tools is a hosted endpoint at https://mcp.arcandledger.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · mcp.arcandledger.com

# add to Claude Code
claude mcp add --transport http bgenc48-arc-ledger-tax-tools 'https://mcp.arcandledger.com/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "bgenc48-arc-ledger-tax-tools": {
      "url": "https://mcp.arcandledger.com/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "bgenc48-arc-ledger-tax-tools": {
      "type": "http",
      "url": "https://mcp.arcandledger.com/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.bgenc48-arc-ledger-tax-tools]
url = "https://mcp.arcandledger.com/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "bgenc48-arc-ledger-tax-tools": {
      "type": "remote",
      "url": "https://mcp.arcandledger.com/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add bgenc48-arc-ledger-tax-tools --url 'https://mcp.arcandledger.com/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  bgenc48-arc-ledger-tax-tools:
    url: "https://mcp.arcandledger.com/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "bgenc48-arc-ledger-tax-tools": {
      "Transport": "http",
      "Url": "https://mcp.arcandledger.com/mcp"
    }
  }
}
# add to Vellum
assistant mcp add bgenc48-arc-ledger-tax-tools -t streamable-http -u 'https://mcp.arcandledger.com/mcp'
// mcp.json
{
  "mcpServers": {
    "bgenc48-arc-ledger-tax-tools": {
      "type": "http",
      "url": "https://mcp.arcandledger.com/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 16 Sept 26 0
    • Server version: 0.17.5 → 0.17.6 functional
  • 15 Sept 26 0
    • Server version: 0.17.4 → 0.17.5 functional
  • 13 Sept 26 0
    • Server version: 0.17.3 → 0.17.4 functional
  • 12 Sept 26 0
    • Tool “book_consultation” rewrote its description, which is the text the model reads security
    • Tool “decode_irs_notice” rewrote its description, which is the text the model reads security
    • Tool “get_document_checklist” rewrote its description, which is the text the model reads security
    • Server version: 0.17.2 → 0.17.3 functional
    • “book_consultation” added an optional parameter “language” cosmetic
    • “get_document_checklist” added an optional parameter “language” cosmetic
    • “get_fee_quote” added an optional parameter “language” cosmetic
    • “triage_tax_problem” added an optional parameter “has_tax_agency_letter” cosmetic
    • “triage_tax_problem” added an optional parameter “language” cosmetic
    • “book_consultation” reworded the description of “type” cosmetic
    • “triage_tax_problem” reworded the description of “has_deadline_soon” cosmetic
    • “triage_tax_problem” reworded the description of “problem” cosmetic
  • 9 Sept 26 0
    • Server version: 0.17.0 → 0.17.2 functional
  • 8 Sept 26 0
    • Server version: 0.16.0 → 0.17.0 functional
  • 1 Sept 26 0
    • Server version: 0.15.7 → 0.16.0 functional
  • 28 Aug 26 0
    • Server version: 0.15.6 → 0.15.7 functional
Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 20 Sept 2026 · Probed https://mcp.arcandledger.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=arcandledger.com CN=WE1,O=Google Trust Services,C=US 3 Sept 2026 2 Dec 2026 ECDSA 256 ECDSA-SHA256 1ea75a08a44981960ed9621857b0f9ca
SANs: arcandledger.com, mcp.arcandledger.com, *.mcp.arcandledger.com
CN=WE1,O=Google Trust Services,C=US (CA) CN=GTS Root R4,O=Google Trust Services LLC,C=US 13 Dec 2023 20 Feb 2029 ECDSA 256 ECDSA-SHA384 7ff31977972c224a76155d13b6d685e3
CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE 15 Nov 2023 28 Jan 2028 ECDSA 384 SHA256-RSA 7fe530bf331343bedd821610493d8a1b

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of mcp.arcandledger.com. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
arcandledger.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://mcp.arcandledger.com/mcp Verified 200
http (plaintext) http://mcp.arcandledger.com/mcp HTTPS enforced 301 https://mcp.arcandledger.com/mcp
MCP tools · 21 exposed · ~5,836 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
book_consultation ~159

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 identity (Enrolled Agent, address, languages EN/TR/ES), and what to expect.

NameTypeReqDescription
languagestringLanguage for an availability or waitlist handoff: English (en), Turkish (tr), or Spanish (es).
topicstringA short subject line for the meeting (optional).
typestringyesWhich consultation or paid review to start. Cross-border or multi-year situations suit the Specialist; a tax-agency letter suits the notice review.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_5472_obligation ~382

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 5472 with a pro-forma Form 1120 is required, the reportable-transaction rule, the deadline and extension, the annual compliance set, and the penalty for not filing. Distinguishes a single-member LLC (files 5472) from a multi-member LLC (a partnership that files Form 1065 instead).

NameTypeReqDescription
entity_typestringyesThe US entity. single_member_llc = a US LLC with ONE owner (a disregarded entity); multi_member_llc = a US LLC with two or more owners (a partnership by default); us_corporation = a US C-corporation;…
foreign_ownedbooleanyesWhether 25% or more of the entity is owned, directly or indirectly, by a non-US person or foreign company. Form 5472 is triggered by 25% foreign ownership.
formed_in_usbooleanWhether the entity was formed in the US (a Wyoming or Delaware LLC is US-formed). Relevant only to the separate BOI report, from which US-formed companies are now exempt.
had_reportable_transactionstringWhether there was a reportable transaction with the foreign owner during the year. Reportable transactions include forming or funding the company, capital contributions, distributions, loans in eithe…
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_fbar_fatca ~188

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.

NameTypeReqDescription
account_countnumberNumber of foreign accounts, if known.
filing_statusstringyesYour US tax filing status.
lives_abroadbooleanyesTrue if your tax home is outside the United States (higher Form 8938 thresholds apply).
max_aggregate_foreign_balance_usdnumberyesThe highest combined value of ALL your foreign financial accounts at any point during the year, in USD.
unfiled_yearsnumberHow many past years of FBARs you have NOT filed but should have. 0 or omitted if current.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_itin_eligibility ~255

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, and official sources. Entity ownership or a bank request alone does not establish personal ITIN eligibility.

NameTypeReqDescription
has_ssnbooleanyesWhether you already have, or are eligible for, a US Social Security Number. If yes, you cannot get an ITIN.
is_foreign_nationalbooleanWhether you are a non-US citizen without US immigration status that grants an SSN. Defaults to true.
reasonstringyesWhy you think a US taxpayer ID may be needed. file_us_tax_return = you must file a US return; owner_of_us_llc = you own a US LLC or corporation, which does not by itself establish a personal ITIN nee…
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_resolution_options ~476

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 agreement with financial review, Offer in Compromise (a fit-check only, never a promise of acceptance), Currently Not Collectible hardship status, and penalty abatement - and lists the forms needed (9465, 433-F/A/B, 656, 843, 8821, 2848) plus collection-statute context. A coarse tax_account_type improves the screen without identifying the taxpayer. Never guarantees an IRS outcome. Set brief:true for a shorter answer.

NameTypeReqDescription
ability_to_paystringyesYour realistic ability to pay. can_pay_in_full_soon = you can clear the balance within about 120-180 days; can_make_monthly_payments = a monthly amount but not in full; can_pay_little = only a very s…
all_required_returns_filedbooleanWhether every required tax return has actually been FILED (even if the tax was not paid). Filing compliance is generally required before the IRS formalizes a collection alternative, but the exact acc…
balance_includes_penaltiesbooleanWhether the balance includes failure-to-file or failure-to-pay penalties, so penalty abatement may reduce it. Defaults to true.
balance_owed_usdnumberyesTotal amount owed to the IRS including tax, penalties, and interest (a rough figure is fine).
briefbooleanSet true for a shorter answer: options come back as path + fit only, without the descriptions.
tax_account_typestringCoarse, nonidentifying IRS account type. individual_income_tax includes Form 1040 income-tax balances, including a sole proprietor whose balance is on Form 1040. business_non_trust_fund_or_out_of_bus…
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_sales_tax_nexus ~157

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 physical-nexus (FBA inventory) trap.

NameTypeReqDescription
annual_sales_usdnumberyesYour total sales into the state(s) in the current or prior calendar year.
statesarrayUS states to check, as 2-letter codes (e.g. ["CA","TX","NY"]). If omitted, the tool explains the general rule.
transaction_countnumberApproximate number of separate sales transactions into the state(s). Some states count transactions as well as dollars.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

check_treaty_withholding ~319

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 give the payer (W-8BEN, W-8BEN-E, W-9, Form 8233). Returns the default statutory rate, the US-Turkey treaty rate where one applies, the documentation a treaty claim needs (including a TIN/ITIN), and how refunds of over-withholding work.

NameTypeReqDescription
income_typestringyesThe kind of US-source payment: "dividends" (from US stocks or a US corporation), "interest", "royalties" (software, content, IP licensing), "personal_services" (freelance/consulting work or wages), o…
payee_countrystringyesCountry of TAX RESIDENCE of the person or company RECEIVING the payment. "turkey" returns the US-Turkey treaty rates this server carries; "other_non_us" returns the default statutory rates and how to…
payee_typestringWhether the payee is an individual or a company/entity. Defaults to individual. Determines the form (W-8BEN vs W-8BEN-E) and the treaty dividend rate.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

compare_formation_states ~172

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 recommends a state based on their situation.

NameTypeReqDescription
operates_in_californiabooleanWhether you (or the business) physically operate in, or are a resident of, California. If true, California registration is generally required regardless of where you form.
prioritystringWhat matters most: lowest_cost, most_privacy, or investor_ready. Defaults to lowest_cost.
raising_venture_capitalbooleanWhether you plan to raise venture capital or convert to a C-corp. If true, Delaware is usually preferred by investors.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

compare_llc_scorp ~258

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 taxes, and the break-even zone.

NameTypeReqDescription
currently_has_llcbooleanWhether the business already operates as an LLC today. Defaults to true. A plain sole proprietorship (no LLC) does not owe the California $800 franchise tax.
expected_net_profit_usdnumberyesExpected annual net profit (revenue minus business expenses), before any owner salary.
owner_salary_estimate_usdnumberA reasonable W-2 salary you would pay yourself as an S-corp owner. If omitted, the midpoint of the reasonable-compensation starting range for an owner-services business (about half of profit) illustr…
statestringUS state, 2-letter or name. Defaults to CA. Only California franchise taxes are modeled (the SMLLC gross-receipts fee is excluded; see caveats).
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

deadline_calendar ~318

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, including Form 5472, FBAR, and the BOI report. Especially useful for non-US founders of US companies.

NameTypeReqDescription
entity_typestringyesYour US tax entity. foreign_owned_llc = a SINGLE-MEMBER US LLC owned by a non-US person (files pro-forma 1120 + 5472); a multi-member foreign-owned LLC is a partnership, use multi_member_llc. foreign…
filing_yearintegerThe tax year whose deadlines you want (the year being reported). Defaults to the prior calendar year.
formed_in_usbooleanWhether the entity was formed in the US (relevant to the BOI report, from which most US-formed companies are now exempt).
has_foreign_bank_over_10kbooleanWhether the aggregate of your foreign financial accounts exceeded $10,000 at any point (triggers FBAR).
has_us_source_wagesbooleanNonresident individuals only: whether you had US wages subject to withholding. Determines the 1040-NR due date (April 15 if yes, June 15 if no).
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

decode_irs_notice ~232

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 the IRS notice code (e.g. CP2000, CP14, LT11) and optionally the notice date and amount shown. Set brief:true for a shorter answer.

NameTypeReqDescription
amount_shownnumberThe dollar amount the notice proposes or bills, if any. Optional; used only for context, never stored.
briefbooleanSet true for a shorter answer: skips the generic how-to-read guidance and common-error list.
notice_codestringyesThe notice or letter code printed on the IRS mail, e.g. "CP2000", "CP 14", "LT11", "Letter 1058".
received_datestringDate on the notice (YYYY-MM-DD). Used to compute the response deadline. The IRS clock runs from the notice date printed on the letter.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_accountable_plan ~349

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 mileage rates by date, and explains the three requirements: business connection, substantiation, and return of excess.

NameTypeReqDescription
business_mileage_periodstringWhen the business miles occurred. Defaults to mixed_or_unknown, which returns a reimbursement range rather than inventing a single rate. For miles in both 2026 periods, call the tool once per period…
business_milesnumberBusiness miles driven in your personal vehicle. For 2026, also identify whether the miles were before July 1, on or after July 1, or span both periods because the IRS changed the rate midyear.
cell_internet_usdnumberAnnual business-use portion of your cell phone and home internet.
home_office_expense_usdnumberAnnual business-use portion of your home costs (rent/mortgage interest, utilities, insurance x business-use %). If you only know square footage, use the simplified method: $5/sq ft up to 300 sq ft =…
marginal_tax_rate_pctnumberYour combined marginal tax rate as a percent (e.g. 24, or 33 to include state). Used to estimate the tax saving. Defaults to 22.
other_business_expense_usdnumberOther out-of-pocket business expenses you personally paid (supplies, travel, professional dues, etc.).
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_augusta_rule ~240

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 keeping the owner-side exclusion separate from the business-side deduction requirements.

NameTypeReqDescription
days_rentednumberyesTotal number of days during the year the dwelling is rented to anyone at a fair rental price, including days rented to your business. The IRC 280A(g) income exclusion requires fewer than 15 total ren…
fair_daily_rental_rate_usdnumberyesThe FAIR-MARKET daily rate to rent your home for a comparable business event (e.g. what a hotel meeting room or event space of similar size would charge). Must be supportable with a written quote or…
marginal_tax_rate_pctnumberYour combined marginal tax rate as a percent (e.g. 24 for 24%, or 33 to include state). Used to translate the deduction into a tax saving. Defaults to 22.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_irs_penalty ~190

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 the current Automatic Exemption from Penalty, First Time Abate, and reasonable-cause relief paths.

NameTypeReqDescription
balance_owed_usdnumberyesThe unpaid tax balance (the tax itself, before penalties and interest).
months_latenumberyesWhole months past the deadline. The failure-to-file penalty counts any part of a month as a full month.
return_filedbooleanWhether you actually FILED the return (even if you did not pay). If false, the larger 5%/month failure-to-file penalty applies. Defaults to false (not filed).
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_quarterly_taxes ~296

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 and due dates, plus California's 30/40/0/30 installment timing.

NameTypeReqDescription
entitystringyesHow the income is taxed. Sole proprietor / SMLLC / partnership pay self-employment tax; S-corp shareholders take wages (withheld) plus distributions.
prior_year_agi_usdnumberLast year's adjusted gross income (AGI). If over $150,000 ($75,000 MFS), the prior-year safe harbor rises from 100% to 110%.
prior_year_total_tax_usdnumberTotal federal tax on last year's return. Enables the prior-year safe harbor (often the easiest to hit).
statestringUS state. Only California installment timing is modeled specifically; when omitted, no state is assumed and only federal figures are computed.
ytd_net_income_usdnumberyesYour net self-employment / business income so far THIS year (year to date), before tax.
ytd_withholding_usdnumberFederal tax already withheld this year (e.g. from a W-2 or S-corp salary). Counts toward the safe harbor.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_reasonable_comp ~180

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 employment tax that classification avoids, and the facts-and-circumstances test the IRS actually applies. Emphasizes that a defensible figure needs a comp study.

NameTypeReqDescription
business_net_profit_usdnumberyesAnnual net profit of the S-corp BEFORE any owner salary (revenue minus business expenses).
profit_driverstringWhat drives the profit: "primarily_owner_services" (consulting/agency/solo professional), "mixed" (your work plus staff/systems), or "capital_or_product" (product/capital/team, not your labor). Defau…
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

estimate_rental_income ~391

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 allowance and carryforward, the short-term 14-day rule, and the marginal federal tax effect.

NameTypeReqDescription
annual_rental_income_usdnumberyesGross rent received this year, before expenses.
filing_statusstringFederal filing status. Defaults to single.
land_percentnumberPercent of the purchase price attributable to non-depreciable land (default 20). The building is depreciated over 27.5 years.
operating_expenses_usdnumberDeductible operating expenses: mortgage interest, property tax, insurance, HOA, repairs, management, utilities, supplies. Excludes depreciation (computed for you).
other_income_usdnumberYour other taxable income (e.g. wages, business) for the year. Sets the marginal rate applied to net rental income, and gates the passive-loss allowance.
personal_use_daysnumberDays YOU used the property personally (short-term only). Triggers the 14-day tax-free rule when a stay is rented 14 days or fewer and used more personally.
property_purchase_price_usdnumberWhat you paid for the property (building + land). Used to compute straight-line depreciation.
real_estate_professionalbooleanWhether you materially participate as a real-estate professional under IRC 469(c)(7). If true, rental losses are not passive-limited.
rental_daysnumberDays the property was rented at fair value (short-term only).
rental_typestringlong_term (standard residential lease) or short_term (Airbnb/VRBO-style). Defaults to long_term.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

explain_tax_document ~308

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 arrived. Covers W-2, W-2G, the 1099 family (NEC, MISC, K, INT, DIV, B, DA, R, G, C, S, SA, Q), Schedule K-1 (partnership 1065, S-corp 1120-S, estate/trust 1041), SSA-1099, 1042-S, 5498, 1098, 1098-T, 1098-E, 1095-A/B/C, and W-9 / W-8BEN requests. For IRS letters and notices (CP or LT codes) use decode_irs_notice instead. Set brief:true for a shorter answer.

NameTypeReqDescription
briefbooleanSet true for a shorter answer: skips the box-by-box guide and the pre-filing checklist.
documentstringyesThe tax form or document name as printed on it, e.g. "W-2", "1099-K", "1099-NEC", "Schedule K-1 (Form 1065)", "1042-S", "1098-T", "SSA-1099", "1095-A", "W-9".
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

get_document_checklist ~291

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 partnership return, an FBAR/Streamlined offshore catch-up, or an ITIN application. Returns the service-specific document list, first-year onboarding extras, and how to prepare files safely without implying that intake or uploads have opened.

NameTypeReqDescription
first_year_clientbooleanWhether this is your first year working with the firm. Adds the one-time onboarding documents (prior returns, IDs, authorizations).
languagestringLanguage for an availability or waitlist handoff: English (en), Turkish (tr), or Spanish (es).
servicestringyesWhat the documents are for: "individual_return" (Form 1040), "self_employed_return" (1040 with Schedule C), "foreign_owned_llc_5472" (pro-forma 1120 + Form 5472 for a foreign-owned single-member US L…
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

get_fee_quote ~115

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 included and the next step by complexity.

NameTypeReqDescription
detailsobject
languagestringLanguage for an availability or waitlist handoff: English (en), Turkish (tr), or Spanish (es).
servicestringyesThe kind of work you want priced.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

triage_tax_problem ~560

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, an identity-verification letter, and payroll tax trouble. Returns an urgency level, a this-week and this-month action plan, what not to do, which tool to run next for the specifics, and the matching published-fee service. General information only; never a guaranteed IRS outcome. Set brief:true for a shorter answer.

NameTypeReqDescription
amount_bandstringRoughly how much is at stake, if known. Bands only, never an exact figure. Current IRS Simple Payment Plan balance criteria generally use a $50,000 ceiling for eligible individual and non-trust-fund…
briefbooleanSet true for a shorter answer: urgency, this-week actions, and the matching service only.
has_deadline_soonbooleanTrue if a letter shows a response or payment date within about two weeks. Raises the urgency. No dates are computed here; use decode_irs_notice only for an IRS letter.
has_tax_agency_letterbooleanTrue only when the user actually has an IRS or state tax-agency letter or notice in hand. Use this to distinguish a payroll or identity concern with a real letter from a general concern. The irs_noti…
languagestringLanguage for an availability or waitlist handoff: English (en), Turkish (tr), or Spanish (es).
problemstringyesThe tax problem, as close as it maps. irs_notice = an IRS letter; back_taxes_owed = an IRS balance that cannot be paid in full; unfiled_returns = federal returns never filed; levy_or_garnishment = an…
years_behindstringFor unfiled returns: how many years are unfiled. The IRS generally looks for the last six years filed to restore filing compliance.
NameTypeReqDescription
disclaimerstringyesGeneral-information disclaimer (identical on every response).
next_stepobjectyesA single review link appropriate to this server surface.
relaystringyesInstruction to the calling assistant: relay figures and dates verbatim (identical on every response).
server_versionstringServer release that produced this response (matches GET /version).
source_urlstringyesThe arcandledger.com page that backs this answer.

No examples provided.

Common questions

What is the Arc & Ledger Tax Tools MCP server?

Arc & Ledger Tax Tools is an MCP server listed in the public MCP registry as io.github.Bgenc48/arc-ledger-tax-tools. Enrolled Agent tax tools: IRS notices, FBAR, LLC vs S-Corp, quarterly estimates & more. This page covers its hosted endpoint (https://mcp.arcandledger.com/mcp).

Is the Arc & Ledger Tax Tools MCP server safe to use?

Arc & Ledger Tax Tools scores 86 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the Arc & Ledger Tax Tools MCP server expose?

Arc & Ledger Tax Tools exposes 21 tools: triage_tax_problem, decode_irs_notice, check_resolution_options, estimate_irs_penalty, explain_tax_document, and 16 more. Their descriptions and schemas cost roughly 5,836 tokens of context every time the server is loaded.

Does the Arc & Ledger Tax Tools MCP server require authentication?

No. We connected to Arc & Ledger Tax Tools without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the Arc & Ledger Tax Tools MCP server still maintained?

Arc & Ledger Tax Tools is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.