Class C industrial copper pricing sourced from verified supplier quotes and invoices. Updated twice weekly. On-chain on Base. Available via REST API.
Start free. Upgrade when you need more.
Try it out
For active shops
For manufacturers
Simple REST API. One endpoint, one price.
https://classc.mj41.me/api/v1Include your API key in the x-api-key header.
curl -H "x-api-key: YOUR_API_KEY" \
https://classc.mj41.me/api/v1/price/priceGet current Class C priceReturns the latest Class C copper scrap price per pound.
Response:
{
"grade": "Class C",
"price_per_lb": 13.85,
"currency": "USD",
"updated_at": "2026-04-21T09:00:00Z",
"source": "ZJ Industries — 3-supplier average",
"next_update": "2026-04-23T09:00:00Z",
"is_fresh": true,
"tier": "copper_standard"
}/price/historyCopper Standard+ onlyReturns historical prices. Optional ?limit=50 parameter.
/statusNo auth requiredCheck if the oracle is operational. No API key needed.
Python
import requests
resp = requests.get(
"https://classc.mj41.me/api/v1/price",
headers={"x-api-key": "YOUR_API_KEY"}
)
price = resp.json()["price_per_lb"]
print(f"Class C Copper: ${price}/lb")JavaScript
const resp = await fetch(
"https://classc.mj41.me/api/v1/price",
{ headers: { "x-api-key": "YOUR_API_KEY" } }
);
const { price_per_lb } = await resp.json();
console.log(`Class C Copper: $${price_per_lb}/lb`);Contact ZJ Industries to request a free Yard Dog API key.
Request API KeyFree tier includes 10 calls/month with 1-update delay.