---
title: "Copper through a copper futures fund"
method: GET
path: "/api/commodities/copper"
tags: ["Short URLs"]
---

# Copper through a copper futures fund

`GET /api/commodities/copper`

## Request

- Base URL: `https://api.prereason.com`
- URL: `https://api.prereason.com/api/commodities/copper`
- Auth: HTTP bearer

Copper through a copper futures fund. CPER's share price and the World Bank's monthly average LME copper price per metric ton, speculators' net position in COMEX copper futures (CFTC), and the dollar and gold funds beside it, each with its measured relationship to CPER. Commodity market data for research agents. Alias for `GET /api/context?briefing=commodities.copper`. Paid per request over x402 or MPP with no API key, or read with a key on the Basic plan or above.

## Query parameters

- `format` 'json' | 'markdown'
- `date` string

## Response `200`

commodities.copper data

## Other responses

- `401`: Authentication required
- `402`: Payment required. The body is an x402 v2 payment quote naming this resource, its price in USDC, and the accepted networks. Pay and retry with the payment header, or authenticate with an API key instead.

## Changes

- **2026-10-06** `5589dc1b96b1`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/prereason/apis/prereason-api/changes/api/commodities/copper/get.md)

---

[API](https://skmtc.dev/prereason/apis/prereason-api.md) - [All operations](https://skmtc.dev/prereason/apis/prereason-api/llms.txt) - [OpenAPI document](https://skmtc.dev/prereason/apis/prereason-api/revisions/fe5bacbc7887?raw)