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Arc & Ledger Tax Reference

REMOTE · MCP.ARCANDLEDGER.COM · SCANNED AUG 3

Read-only US tax reference for notices, deadlines, filing screens, and clearly labeled estimates.

70 Trust /100
Trust breakdown (6 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 →

Endpoint Security74
Transport & Reachability100
Schema Quality & AI Usability61
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 3333 tokens (~256/item across 13 items; 13 tools + 0 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 Management20
  • Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
  • Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

remote · mcp.arcandledger.com

# add to Claude Code
claude mcp add --transport http com-arcandledger-tax-tools https://mcp.arcandledger.com/directory/mcp
# ~/.codex/config.toml
[mcp_servers.com-arcandledger-tax-tools]
url = "https://mcp.arcandledger.com/directory/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-arcandledger-tax-tools": {
      "type": "remote",
      "url": "https://mcp.arcandledger.com/directory/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add com-arcandledger-tax-tools --url https://mcp.arcandledger.com/directory/mcp --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  com-arcandledger-tax-tools:
    url: "https://mcp.arcandledger.com/directory/mcp"
// mcp.json
{
  "mcpServers": {
    "com-arcandledger-tax-tools": {
      "type": "http",
      "url": "https://mcp.arcandledger.com/directory/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.

  • 3 Aug 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

  • 1 Aug 26 +1
    • Server version: 0.15.1 → 0.15.3 functional
  • 31 Jul 26 +3
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 30 Jul 26 +1
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 29 Jul 26 0
    • Stability: unverified → 0.03 functional
  • 28 Jul 26 64

    First indexed and scored.

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 3 Aug 2026 · Probed https://mcp.arcandledger.com/directory/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 6 Jul 2026 4 Oct 2026 ECDSA 256 ECDSA-SHA256 8e4d0e7f713453061389014f1df73f02
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
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
Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://mcp.arcandledger.com/directory/mcp Verified 200
http (plaintext) http://mcp.arcandledger.com/directory/mcp HTTPS enforced 301 https://mcp.arcandledger.com/directory/mcp
MCP tools — 13 exposed · ~3,222 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.

Tool Tokens
check_5472_obligation ~297

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

check_fbar_fatca ~171

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

check_itin_eligibility ~225

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

check_resolution_options ~382

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 will approve an option.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

check_treaty_withholding ~237

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

deadline_calendar ~277

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

decode_irs_notice ~183

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

estimate_accountable_plan ~315

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

estimate_augusta_rule ~223

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

estimate_irs_penalty ~148

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

estimate_quarterly_taxes ~267

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

estimate_rental_income ~352

Use to estimate a basic rental-income result from nonidentifying figures and identify the modeled depreciation, passive-loss, and personal-use limitations.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.

explain_tax_document ~145

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.

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_urlstringyesOfficial IRS or FinCEN authority to review before relying on the result.

No examples provided.