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Arc & Ledger Tax Reference

connects

mcp.arcandledger.com

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

https://mcp.arcandledger.com/directory/mcpWebsiteNo authMCP 2025-11-25v0.17.11last checked 8 Oct 2026spoke MCP on 100% of 92 checks (30 days)initialize in 243 ms

Will my client connect?

Decided from what the probe found at the endpoint, and from what each client's own documentation says it can complete. Every row carries the day that documentation was read.

✓Claude CodeConnects

The endpoint answers an anonymous handshake, so no credential is needed.

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

Claude Code docs · read on 2026-08-30

✓Claude (claude.ai & Desktop)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Connectors → Add custom connector, then paste https://mcp.arcandledger.com/directory/mcp.

Claude (claude.ai & Desktop) docs · read on 2026-08-30

✓ChatGPTConnects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Apps → Advanced settings → Developer mode, then create a connector pointing at https://mcp.arcandledger.com/directory/mcp.

ChatGPT docs · read on 2026-08-30

✓CursorConnects

The endpoint answers an anonymous handshake, so no credential is needed.

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

Cursor docs · read on 2026-08-30

✓VS Code (Copilot)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

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

VS Code (Copilot) docs · read on 2026-08-30

How to authenticate

Checked against the endpoint by our probe on 8 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 13 tools listable

Tools

check_5472_obligationcheck_fbar_fatcacheck_itin_eligibilitycheck_resolution_optionscheck_treaty_withholdingdeadline_calendardecode_irs_noticeestimate_accountable_planestimate_augusta_ruleestimate_irs_penaltyestimate_quarterly_taxesestimate_rental_incomeexplain_tax_document

Contract history

6 Oct 2026v0.17.11no contract changes

6 Oct 2026v0.17.10no contract changes

4 Oct 2026v0.17.9no contract changes

22 Sep 2026v0.17.7no contract changes

15 Sep 2026v0.17.6no contract changes

15 Sep 2026v0.17.5no contract changes

13 Sep 2026v0.17.4no contract changes

11 Sep 2026v0.17.3no contract changes

8 Sep 2026v0.17.2no contract changes

8 Sep 2026v0.17.1no contract changes

7 Sep 2026v0.17.0no contract changes

31 Aug 2026v0.16.0no contract changes

27 Aug 2026v0.15.7no contract changes

24 Aug 2026v0.15.6first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/arc-ledger-tax-reference/badge.svg)](https://mcpi.app/servers/arc-ledger-tax-reference)