Arc & Ledger Tax Reference MCP MCP server

A read-only remote MCP endpoint providing general US tax explanations, eligibility screens, and clearly labeled estimates. It does not prepare or file returns, transmit information to a tax authority, create a practitioner-client relationship, or direct users to a paid service.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Arc & Ledger LLC

MCP endpoint (Streamable HTTP)

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

Vendor documentation

What you can do with it

Explain a supported IRS notice or letter code and identify the response path.
Estimate selected federal late-filing, late-payment, or underpayment penalties.
Explain the purpose and common fields of a named US tax form or information document.
Return common federal filing and payment dates for a selected filer or entity type.

Tools advertised by the last live check:

decode_irs_notice
check_resolution_options
estimate_irs_penalty
explain_tax_document
deadline_calendar
check_fbar_fatca
check_treaty_withholding
check_itin_eligibility
check_5472_obligation
estimate_quarterly_taxes
estimate_accountable_plan
estimate_augusta_rule
estimate_rental_income

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http arc-ledger-tax-reference-mcp https://mcp.arcandledger.com/directory/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add arc-ledger-tax-reference-mcp --url https://mcp.arcandledger.com/directory/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable arc-ledger-tax-reference-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "arc-ledger-tax-reference-mcp": {
      "url": "https://mcp.arcandledger.com/directory/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "arc-ledger-tax-reference-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.arcandledger.com/directory/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start arc-ledger-tax-reference-mcp and inspect its tools.

VS Code configuration

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

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http arc-ledger-tax-reference-mcp https://mcp.arcandledger.com/directory/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "arc-ledger-tax-reference-mcp": {
      "url": "https://mcp.arcandledger.com/directory/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "arc-ledger-tax-reference-mcp": {
      "serverUrl": "https://mcp.arcandledger.com/directory/mcp"
    }
  }
}

See all 1,687

Do you run Arc & Ledger Tax Reference MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

Claim this listing