---
title: "0sand1s (@0sand1s)"
description: "0sand1s: API listing imported from its public OpenAPI spec."
account: "0sand1s"
---

# 0sand1s

0sand1s: 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/0sand1s/feed.md

- [0s and 1s CIS API](https://skmtc.dev/0sand1s/apis/0s-and-1s-cis-api.md): Construction Industry Scheme: calculate deductions, gross-up, tax months, penalties and nil returns