Arc & Ledger Tax Reference

com.arcandledger/tax-toolsVersion 0.15.1

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

Status

Responds188 msNov 14, 2026, 13:47 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:47 UTC
Latency: 188 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

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Connect

Streamable HTTP

https://mcp.arcandledger.com/directory/mcpResponds188 msNov 14, 2026, 13:47 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: tax-tools
Remote MCP server URL: https://mcp.arcandledger.com/directory/mcp

Cursor

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

VS Code

code --add-mcp '{"name":"tax-tools","type":"http","url":"https://mcp.arcandledger.com/directory/mcp"}'

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Tools

13 tools

Tools of Arc & Ledger Tax Reference
	Description		Read-only	Idempotent	Open world
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No
`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.	Use to estimate a basic rental-income result from nonidentifying figures and identify the modeled depreciation, passive-loss, and personal-use limitations.	No	Yes	Not declared	No
`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.	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.	No	Yes	Not declared	No

Details

Registry status: Active
Published: Jul 28, 2026
Updated: Jul 28, 2026
Website: https://www.arcandledger.com/mcp/directory/⁠ (opens in a new tab)
Repository: https://github.com/Bgenc48/arc-ledger-mcp⁠ (opens in a new tab)
Categories (suggested): Invoicing and accountingSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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