---
title: "sig(0) (@sig-0)"
description: "Open-source engineering collective building tools, frameworks and protocols."
account: "sig-0"
---

# sig(0)

Open-source engineering collective building tools, frameworks and protocols.

## 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/sig-0/feed.md

- [fxrates](https://skmtc.dev/sig-0/apis/fxrates.md): Currency exchange rates: look up base and pair rates, plus supported currencies and sources