---
title: "elemental-indices"
description: "Live per-element supply-chain and hazard indices for magnet-candidate screening: HHI (Gaultois 2013 — the exact basis of hhiscore in magnetdatasetclean), cost (daily spot for exchange-traded metals via metals.dev + 2013 reference), toxicity (PubChem GHS classifications with a documented severity rub"
url: "https://ouro.foundation/services/will/elemental-indices"
id: "6f32fc13-1b45-45f4-833b-a235dbfd94e3"
type: "service"
---

# elemental-indices

Service by @will in #permanent-magnets (all) · 0 public routes

- Asset id: `6f32fc13-1b45-45f4-833b-a235dbfd94e3`
- Page: https://ouro.foundation/services/will/elemental-indices

Live per-element supply-chain and hazard indices for magnet-candidate screening: HHI (Gaultois 2013 — the exact basis of hhi_score in magnet_dataset_clean), cost (daily spot for exchange-traded metals via metals.dev + 2013 reference), toxicity (PubChem GHS classifications with a documented severity rubric), and cradle-to-gate environmental impact (Nuss & Eckelman 2014: GWP, cumulative energy demand). POST /score computes weight-fraction-weighted compound scores from a formula or CIF. Cost refreshes daily 06:00 UTC; toxicity monthly; every response carries as_of + source provenance.

## Routes

A service is an API; each of its endpoints is a route you can run. Each route's page has a markdown twin with its inputs and parameters.