Westlake
Westlake Corporation is a global Fortune 500 manufacturer and supplier of materials and innovative products that enhance life every day. The company produces chemical materials and building products across multiple sectors including packaging, healthcare, automotive, consumer goods, and construction. Westlake operates through two primary segments: Performance and Essential Materials (PEM) and Housing and Infrastructure Products (HIP), with net sales of approximately $11 billion annually.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Westlake the way a machine reads it — 14 machine-readable artifacts, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Westlake scores 9.5/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
Put this on your own site. The badge is drawn live from Westlake's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/westlake/"
title="Westlake on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/westlake.svg"
alt="Westlake Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/westlake/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/westlake/"
title="Westlake on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/westlake/card.svg"
alt="Westlake Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Westlake
Each block below is one kind of artifact we hold for Westlake. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Features 5
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Performance and Essential Materials
Chemical segment producing ethylene, polyethylene, PVC, chlor-alkali, epoxy resins, and related materials for industrial applications.
Housing and Infrastructure Products
Building products segment manufacturing PVC pipe, vinyl siding, windows, doors, and related infrastructure materials.
Global Manufacturing
Manufacturing footprint spanning North America, Europe, and Asia with approximately 15,000 employees and multiple production facilities.
Recycled Materials
Circular economy initiatives producing recycled plastic materials and sustainable chemical feedstocks.
Specialty Compounds
Custom compounding and specialty formulations for Dimex, Global Compounds, and other specialty product lines.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Use Cases 4
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
Industrial Packaging
Polyethylene and PVC resin supply for rigid and flexible packaging applications across consumer goods and industrial markets.
Construction Infrastructure
PVC pipe and fittings systems for water, wastewater, and industrial piping applications in residential and commercial projects.
Vinyl Building Envelope
Vinyl siding, windows, and trim products for energy-efficient residential building envelopes and renovation projects.
Chemical Synthesis
Chlor-alkali and caustic soda products as inputs for chemical synthesis, water treatment, and industrial process chemistry.
Integrations 4
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
SAP ERP
Enterprise resource planning integration for supply chain, procurement, and financial management across global operations.
Microsoft Azure
Cloud infrastructure services supporting digital transformation and enterprise technology initiatives.
Microsoft Power BI
Business intelligence and analytics platform for operational reporting and financial performance monitoring.
EDI Connectivity
Electronic Data Interchange integration with trading partners for order management and supply chain transactions.
Resources
Every other property we hold for Westlake — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Access & Security 1
Authentication, authorization, and security posture
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/westlake · machine-readable index on apis.io
This is an independent, third-party profile of Westlake, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.