Coreshell

Coreshell (Coreshell Technologies, Inc.) is a San Leandro, California battery technology company founded in 2017 that develops silicon-anode lithium-ion battery cells built on low-cost, domestically sourced metallurgical-grade silicon instead of graphite or refined polysilicon. A proprietary nanolayer surface coating stabilizes the silicon anode, and the company has unveiled commercial-scale 60 Ah cells aimed at electric vehicles, defense platforms and stationary energy storage. Coreshell is a materials and cell manufacturer, not a software vendor: its public web presence is a Webflow marketing site with no developer portal, API reference, machine-readable specification, SDK, or public code repository.

Coreshell is profiled on the APIs.io network. Tagged areas include Company, Batteries, Energy Storage, Electric Vehicles, and Advanced Materials.

Coreshell’s developer surface includes engineering blog and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

3.8/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Batteries Energy Storage Electric Vehicles Advanced Materials Manufacturing Clean Energy Defense

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 3.8/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Energy & Utilities regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/coreshell: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Coreshell Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Contact

Contact

Company 6

The organization behind the API

Website

About

Blog

Careers

LinkedIn

Twitter

Twitter

Other 1

Properties that don't map to a standard resource type

Profile

Profile

Source (apis.yml)

aid: coreshell
name: Coreshell
description: 'Coreshell (Coreshell Technologies, Inc.) is a San Leandro, California battery technology company founded in
  2017 that develops silicon-anode lithium-ion battery cells built on low-cost, domestically sourced metallurgical-grade silicon
  instead of graphite or refined polysilicon. A proprietary nanolayer surface coating stabilizes the silicon anode, and the
  company has unveiled commercial-scale 60 Ah cells aimed at electric vehicles, defense platforms and stationary energy storage.
  Coreshell is a materials and cell manufacturer, not a software vendor: its public web presence is a Webflow marketing site
  with no developer portal, API reference, machine-readable specification, SDK, or public code repository.'
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-09-02'
  method: derived
image: https://cdn.prod.website-files.com/6418c049a689a74a41dc6deb/641bc4b2523aa24c2a4aeb27_webclip.png
url: https://raw.githubusercontent.com/api-evangelist/coreshell/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-11'
modified: '2026-08-11'
tags:
- Company
- Batteries
- Energy Storage
- Electric Vehicles
- Advanced Materials
- Manufacturing
- Clean Energy
- Defense
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.coreshell.com
- type: About
  url: https://www.coreshell.com/about
- type: Blog
  url: https://www.coreshell.com/blog
- type: Contact
  url: https://www.coreshell.com/contact
- type: Careers
  url: https://www.coreshell.com/careers
- type: LinkedIn
  url: https://www.linkedin.com/company/coreshell-technologies-inc/
- type: Twitter
  url: https://twitter.com/coreshelltech
- type: Profile
  url: https://forgeglobal.com/coreshell_stock/
- type: DomainSecurity
  url: security/coreshell-domain-security.yml
- type: LLMsTxt
  url: llms/coreshell-llms.txt
x-enrichment:
  date: '2026-08-11'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Coreshell manufactures silicon-anode lithium-ion battery cells and metallurgical-silicon anode material; its entire
    web presence is a seven-page Webflow marketing site (solutions, defense, about, blog, careers, contact) with no developer,
    docs, or API section, and api./docs./developer.coreshell.com do not resolve in DNS.
  evidence:
  - url: https://www.coreshell.com/openapi.json
    status: 404
  - url: https://www.coreshell.com/.well-known/agent-card.json
    status: 404
  - url: https://www.coreshell.com/developers
    status: 404
  - url: https://www.coreshell.com/sitemap.xml
    status: 200
  checked: '2026-08-11'

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