---
title: "Arcandledger (@arcandledger)"
description: "Arcandledger: API listing imported from its public OpenAPI spec."
account: "arcandledger"
---

# Arcandledger

Arcandledger: API listing imported from its public OpenAPI spec.

## APIs

1 public API with a stored document.
Each links to its markdown overview; the same address with
`/llms.txt` in place of `.md` lists its operations.
Changes across these APIs: https://skmtc.dev/arcandledger/feed.md

- [Arc & Ledger Tax Data API](https://skmtc.dev/arcandledger/apis/arc-ledger-tax-data-api.md): U.S. tax reference: federal tax parameters, filing deadlines, IRC 6621 interest rates, and IRS notice and form profiles