# Arch Coal

**Canonical:** https://apis.io/providers/arch-coal/  
**Website:** https://corenaturalresources.com/  
**APIs profiled:** 1

Arch Coal was a St. Louis-based producer and marketer of metallurgical and thermal coal, renamed Arch Resources in 2020. In January 2025 Arch Resources merged with CONSOL Energy in a merger of equals to form Core Natural Resources, Inc. (NYSE: CNR), headquartered in Canonsburg, Pennsylvania. The combined company operates the Pennsylvania Mining Complex, Leer, Leer South, West Elk, Black Thunder, and other mines across six U.S. states with 5,000+ employees, and holds stakes in East Coast marine export terminals. Core Natural Resources does not publish a public developer API. Its external digital surface is a corporate website at corenaturalresources.com plus a separate investor relations portal, both serving HTML and PDF only — the investor portal's /rss and /feed paths were probed on 2026-07-25 and every one returns HTML, not XML. Machine-readable company data is available only through third-party channels, namely the SEC's own EDGAR APIs.

## Kin Score — 15.3 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 15.3).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Energy & Utilities**: 18.9 (matched via tags).

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

No public API program — onboarding: unknown, pricing: unknown, trial: no (confidence: high).

## APIs (1)

- **SEC EDGAR Filings (Core Natural Resources, CIK 1710366)** — Machine-readable filing data for Core Natural Resources is available from the U.S. Securities and Exchange Commission, not from the company. The SEC EDGAR submissions API return...

## Security (1)

- **Arch Coal Domain Security** — HSTS · DMARC

## Plans (1)

- **Arch Coal Plans Pricing**

## Use cases (5)

- **Investment Research** — Analyze Core Natural Resources (NYSE:CNR) financial performance, production volumes, and market position through EDGAR filings and investor materials.
- **Merger and Lineage Tracking** — Follow the Arch Coal → Arch Resources → Core Natural Resources lineage, including the CONSOL Energy merger of equals completed January 2025.
- **ESG and Safety Reporting** — Access environmental, safety, and governance disclosures published through the corporate sustainability section.
- **Supply Chain and Procurement** — Steel producers, utilities, and suppliers reference product specifications, terms and conditions, and the Supplier Code of Conduct.
- **Commodity Market Analysis** — Track metallurgical and thermal coal production, export capacity, and sales volumes for commodity market research.

## Tags

Mining, Coal, Metallurgical Coal, Thermal Coal, Energy, Core Natural Resources, Investor Relations, Fortune 500

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/arch-coal/). Scores are computed from the provider's own public artifacts under a published rubric.