Arc & Ledger Tax Reference MCP Server

by arcandledger Your server? Claim it

answering

Arc & Ledger Tax Reference is answering right now. Last checked 6 min ago. It exposes 13 tools.

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

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 91 days of history · worst day 95%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

151 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 26

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 10 August 2026. No other catalogue keeps this.

22 Oct a tool changed version2 times that day

21 Oct a tool changed version

15 Oct a tool changed version2 times that day

14 Oct a tool changed version4 times that day

14 Oct a tool changed the parameters it asks for check_resolution_options

6 Oct a tool changed version2 times that day

4 Oct a tool changed version2 times that day

22 Sep a tool changed version

15 Sep a tool changed version

14 Sep a tool changed version

and 16 more, back to 10 August 2026

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add tax-tools --transport http https://mcp.arcandledger.com/directory/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.arcandledger.com/directory/mcp

~/.codex/config.toml

[mcp_servers.tax-tools]
url = "https://mcp.arcandledger.com/directory/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "tax-tools": {
      "url": "https://mcp.arcandledger.com/directory/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "tax-tools": {
      "type": "http",
      "url": "https://mcp.arcandledger.com/directory/mcp"
    }
  }
}

Available tools 13

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

estimate

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.

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.

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.

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.

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.

5472

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.

deadline

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.

decode

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.

explain

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.

fbar

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.

itin

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.

resolution

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 will approve an option.

treaty

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.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.arcandledger.com/directory/mcp	streamable-http	answering	82 ms	6 min ago

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Arc & Ledger Tax Reference — questions

Answers built from our own checks of this server.

What can Arc & Ledger Tax Reference do?

It exposes 13 tools, read directly from the server on our last check. Among them: check_5472_obligation, check_fbar_fatca, check_itin_eligibility, check_resolution_options, check_treaty_withholding, deadline_calendar and 7 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Arc & Ledger Tax Reference working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 151 ms. The bar chart above shows every period we have measured.

Is Arc & Ledger Tax Reference still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect Arc & Ledger Tax Reference?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Arc & Ledger Tax Reference need an API key?

No. Arc & Ledger Tax Reference completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 13 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Arc & Ledger Tax Reference?

It answers our handshake in 151 ms on average, which is faster than 81% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.