Pull COMEX copper futures historical/settlement data via the CME Group DataMine API for scrap copper price benchmarking
domain: CME Group DataMine API (cmegroup.com/datamine) · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Purchase or subscribe to the relevant CME DataMine copper (COMEX) data product first — API access only exposes files your account is entitled to, it is not open/free market data
Obtain a CME Group API ID and authenticate using either OAuth 2.0 or Basic Auth, per the DataMine API documentation
Call the DataMine List API (base URL https://datamine.new.cmegroup.com/api/list_entitlements_files) to enumerate entitled historical/settlement files, paging through results (max 1,000 per page)
Download the entitled COMEX copper historical/settlement files and parse them into a scrap-copper price benchmarking pipeline
Respect the documented rate limit of 120 requests/minute per API ID, backing off on HTTP 429 responses
Known gotchas
This is a paid, entitlement-gated product — no API calls will return copper data until the specific data product has been purchased
The List/DataMine API surfaces bulk historical file metadata and downloads, not a simple "latest price" JSON call; real-time streaming is a separate CME product with its own onboarding
The API supports both OAuth2 and Basic Auth depending on account type; using the wrong scheme is a common cause of authentication failures
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