# HollyFrontier

> HollyFrontier Corporation was an independent petroleum refiner and marketer of gasoline,
> diesel fuel, jet fuel, asphalt and specialty lubricant products, headquartered in Dallas,
> Texas. In March 2022 it was reorganized under a new parent, HF Sinclair Corporation
> (NYSE: DINO), following the acquisition of Sinclair Oil. The HollyFrontier brand no longer
> operates independently: www.hollyfrontier.com returns HTTP 301 to www.hfsinclair.com.

## Status

- Absorbed into HF Sinclair Corporation (2022). Profiled separately at api-evangelist/hf-sinclair.
- No public API, developer portal, SDK, webhook surface or machine-readable specification was
  found on any HollyFrontier or HF Sinclair host as of 2026-09-13.
- Contract discovery probed every known host for OpenAPI/Swagger at the host root,
  `/.well-known/` discovery documents, `apis.json`, `llms.txt`, an A2A agent card and an
  MCP endpoint. Every path missed. No GitHub organization (`hollyfrontier`, `hfsinclair`)
  exists; no first-party package is published on npm or PyPI.

## Hosts probed

- https://www.hollyfrontier.com — 301 to https://www.hfsinclair.com/ ; Cloudflare managed challenge on direct crawls
- https://hollyfrontier.com — same Q4 Inc investor-relations web farm
- https://investor.hollyfrontier.com — investor relations, Q4 Inc hosted
- https://customerportal.hollyfrontier.com — DTN-operated customer portal, member login required
- https://www.hfsinclair.com — successor corporate site

## Artifacts in this profile

- apis.yml — https://raw.githubusercontent.com/api-evangelist/hollyfrontier/refs/heads/main/apis.yml
- well-known/hollyfrontier-well-known.yml — the /.well-known/ probe record, including the
  negative control that shows the corporate web farm answers 200 "Invalid key" for every path
- security/hollyfrontier-domain-security.yml — TLS/HSTS/DNSSEC/CAA/SPF/DMARC probe of hollyfrontier.com

## Notes for agents

There is nothing here to call. HollyFrontier publishes no callable API surface. Bulk fuel and
lubricants customers transact through the member-login customer portal and, per the company's
own supplier material, through EDI with carriers and partners — neither is a public contract.
Anyone looking for a current HF Sinclair surface should start at the hf-sinclair profile.

---
This llms.txt was generated by API Evangelist on 2026-09-13 from this repository's apis.yml and
probe artifacts; HollyFrontier publishes no llms.txt of its own (/llms.txt returned HTTP 404 on
every host probed). Verify current details against the company's own site.