# Tesoro

**Canonical:** https://apis.io/providers/tesoro/  
**Website:** https://www.tesoro.com  
**APIs profiled:** 0

Tesoro Corporation (later rebranded as Andeavor) was a Fortune 100 independent petroleum refiner and marketer headquartered in San Antonio, Texas. Founded in 1968, the company operated ten refineries in the Western United States with combined crude oil capacity of approximately 1.2 million barrels per day and approximately 3,000 branded retail gas stations. Tesoro rebranded as Andeavor in 2017 following its acquisition of Western Refining, and was acquired by Marathon Petroleum on October 1, 2018. No public developer API was offered.

## Kin Score — 9.0 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 9.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 11.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Energy & Utilities**: 14.9 (matched via tags).

## Agent readiness — 0.0 (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 | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Tesoro Domain Security** — TLSv1.3 · DMARC

## Tags

Petroleum, Refining, Energy, Oil and Gas, Retail Fuel, Fortune 100

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