Skeleton Technologies

Skeleton Technologies is an Estonian-German energy storage manufacturer, founded in Tartu, Estonia in 2009 by Oliver Ahlberg and Taavi Madiberk, that designs and builds high-power supercapacitor and SuperBattery systems on its patented Curved Graphene material. Its product line spans SkelCap ultracapacitor cells, supercapacitor modules, and the GrapheneUPS, GrapheneGPU and GrapheneBBU power systems aimed at AI data centers, grid stability, defense, automotive, heavy transportation and industrial customers. The company has raised close to EUR 400 million, counts Marubeni and Siemens among its backers, and manufactures at its ISO 9001 / ISO 14001 certified Leipzig Superfactory in Germany, a Varkaus facility in Finland and a Curved Graphene plant in Bitterfeld-Wolfen. Skeleton sells physical power hardware; it operates no public developer program, API, SDK or machine-readable contract.

Skeleton Technologies is profiled on the APIs.io network. Tagged areas include Company, Energy Storage, Supercapacitors, Ultracapacitors, and Graphene.

Skeleton Technologies’ developer surface includes engineering blog and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

6.7/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-02 · rubric v0.18.0

0 APIs

Company Energy StorageSupercapacitorsUltracapacitorsGraphene Manufacturing Data CentersGrid StabilityHardware Estonia Germany

Kin Score

Kin Score How this is scored →
scored 2026-09-02 · rubric v0.18.0

Composite quality — 6.7/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.0 / 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 Surface 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.

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/skeleton-technologies: 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 →

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

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 7

The organization behind the API

Website

About

Blog

BlogRSS

Press

Careers

Investors

Scroll for all 7

Other 3

Properties that don't map to a standard resource type

Products

Products

Downloads

Downloads

SecondaryMarket

SecondaryMarket

Source (apis.yml)

aid: skeleton-technologies
name: Skeleton Technologies
description: Skeleton Technologies is an Estonian-German energy storage manufacturer, founded in Tartu, Estonia in 2009 by
  Oliver Ahlberg and Taavi Madiberk, that designs and builds high-power supercapacitor and SuperBattery systems on its patented
  Curved Graphene material. Its product line spans SkelCap ultracapacitor cells, supercapacitor modules, and the GrapheneUPS,
  GrapheneGPU and GrapheneBBU power systems aimed at AI data centers, grid stability, defense, automotive, heavy transportation
  and industrial customers. The company has raised close to EUR 400 million, counts Marubeni and Siemens among its backers,
  and manufactures at its ISO 9001 / ISO 14001 certified Leipzig Superfactory in Germany, a Varkaus facility in Finland and
  a Curved Graphene plant in Bitterfeld-Wolfen. Skeleton sells physical power hardware; it operates no public developer program,
  API, SDK or machine-readable contract.
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://www.skeletontech.com/hubfs/skeleton-technologies-1.jpg
url: https://raw.githubusercontent.com/api-evangelist/skeleton-technologies/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-08-28'
modified: '2026-08-28'
tags:
- Company
- Energy Storage
- Supercapacitors
- Ultracapacitors
- Graphene
- Manufacturing
- Data Centers
- Grid Stability
- Hardware
- Estonia
- Germany
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/skeleton-technologies-domain-security.yml
- type: Website
  url: https://www.skeletontech.com/
- type: About
  url: https://www.skeletontech.com/about
- type: Contact
  url: https://www.skeletontech.com/contact
- type: Blog
  url: https://www.skeletontech.com/skeleton-blog
- type: BlogRSS
  url: https://www.skeletontech.com/skeleton-blog/rss.xml
- type: PrivacyPolicy
  url: https://www.skeletontech.com/privacy-policy
- type: Products
  url: https://www.skeletontech.com/all-products
- type: Downloads
  url: https://www.skeletontech.com/downloads
- type: Press
  url: https://www.skeletontech.com/press
- type: Careers
  url: https://www.skeletontech.com/careers
- type: Investors
  url: https://www.skeletontech.com/investors
- type: SecondaryMarket
  url: https://www.hiive.com/securities/skeleton-technologies-stock
- type: LLMsTxt
  url: llms/skeleton-technologies-llms.txt
x-enrichment:
  date: '2026-08-28'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Skeleton Technologies sells physical power hardware — supercapacitor cells, modules and Graphene UPS/BBU systems
    — and its only software is embedded management firmware inside the units; www.skeletontech.com is a HubSpot marketing
    site with no developer section, and the api./developer./docs. subdomains do not resolve in DNS.
  evidence:
  - url: https://www.skeletontech.com/openapi.json
    status: 404
  - url: https://www.skeletontech.com/llms.txt
    status: 404
  - url: https://www.skeletontech.com/.well-known/agent-card.json
    status: 404
  - url: https://api.skeletontech.com/
    status: 0
  checked: '2026-08-28'

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/skeleton-technologies"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/skeleton-technologies/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/skeleton-technologies/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.