Tokamak Energy

Tokamak Energy is a private fusion energy company founded in 2009 as a spinout from the UK Atomic Energy Authority, headquartered at 173 Brook Drive, Milton Park, Oxfordshire OX14 4SD, with subsidiaries in the United States and Japan and more than 300 employees. It runs a two-track strategy: advancing commercial fusion energy through compact spherical tokamaks, and developing high temperature superconducting (HTS) magnet technology as a business in its own right. Its flagship device ST40 is the world's highest field spherical tokamak and is undergoing a USD 52 million upgrade co-funded with the US Department of Energy and the UK Department for Energy Security and Net Zero. Demo4 became the first HTS fusion magnet system to achieve fusion-relevant magnetic fields in 2025, and the company was selected as Magnet Systems Partner for the UK's STEP programme under a GBP 70 million contract running to 2029. The group is organised into three integrated businesses — TE Magnetics (HTS technology, established 2024), Ridgway Machines (manufacturing, acquired 2025) and Fusion. Tokamak Energy is a fusion and superconducting hardware company rather than a software vendor: it publishes no commercial or developer-facing product API, no developer portal, no SDKs and no OpenAPI of its own. The only machine-readable interface it exposes publicly is the WordPress REST content API behind its corporate website at tokamakenergy.com, which is anonymously readable, read-only for unauthenticated callers, and is captured here for discovery purposes. Its public engineering output is instead released as open-source plasma physics code — GSFit, RTGSFit and FORGE — through the tokamak-energy GitHub organisation.

Tokamak Energy is listed with 1 API on the APIs.io network. Tagged areas include Company, Fusion Energy, Energy, Superconductors, and HTS Magnets.

Tokamak Energy’s developer surface includes engineering blog, support, authentication, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

15.5/100 emerging ▬ flat Agent 9/100 agent aware Front door AI 2/6 trace Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

1 API

Company Fusion Energy Energy SuperconductorsHTS MagnetsAdvanced Manufacturing Deep Tech Plasma Physics Scientific Computing Research and Development United Kingdom

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 15.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.2 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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/tokamak-energy: 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 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Tokamak Energy Website (WordPress REST)

The public WordPress REST API (wp-json) of the Tokamak Energy website at tokamakenergy.com: the route index of the site's content management system, catalogued as one site surfa...

Pricing Plans 1

Published pricing tiers and plan structures.

Tokamak Energy Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Tokamak Energy Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Tokamak Energy Authentication

http · 1 scheme

SECURITY

Tokamak Energy Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

Videos

Videos

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

PrivacyPolicy

PrivacyPolicy

Company 5

The organization behind the API

Website

About

Blog

BlogRSS

Careers

Other 1

Properties that don't map to a standard resource type

Technology

Technology

Source (apis.yml)

aid: tokamak-energy
name: Tokamak Energy
description: 'Tokamak Energy is a private fusion energy company founded in 2009 as a spinout from the UK Atomic Energy Authority,
  headquartered at 173 Brook Drive, Milton Park, Oxfordshire OX14 4SD, with subsidiaries in the United States and Japan and
  more than 300 employees. It runs a two-track strategy: advancing commercial fusion energy through compact spherical tokamaks,
  and developing high temperature superconducting (HTS) magnet technology as a business in its own right. Its flagship device
  ST40 is the world''s highest field spherical tokamak and is undergoing a USD 52 million upgrade co-funded with the US Department
  of Energy and the UK Department for Energy Security and Net Zero. Demo4 became the first HTS fusion magnet system to achieve
  fusion-relevant magnetic fields in 2025, and the company was selected as Magnet Systems Partner for the UK''s STEP programme
  under a GBP 70 million contract running to 2029. The group is organised into three integrated businesses — TE Magnetics
  (HTS technology, established 2024), Ridgway Machines (manufacturing, acquired 2025) and Fusion. Tokamak Energy is a fusion
  and superconducting hardware company rather than a software vendor: it publishes no commercial or developer-facing product
  API, no developer portal, no SDKs and no OpenAPI of its own. The only machine-readable interface it exposes publicly is
  the WordPress REST content API behind its corporate website at tokamakenergy.com, which is anonymously readable, read-only
  for unauthenticated callers, and is captured here for discovery purposes. Its public engineering output is instead released
  as open-source plasma physics code — GSFit, RTGSFit and FORGE — through the tokamak-energy GitHub organisation.'
url: https://raw.githubusercontent.com/api-evangelist/tokamak-energy/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: covered
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://tokamakenergy.com/wp-content/uploads/2025/03/TE_symbol_orange.svg
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-30'
modified: '2026-08-30'
tags:
- Company
- Fusion Energy
- Energy
- Superconductors
- HTS Magnets
- Advanced Manufacturing
- Deep Tech
- Plasma Physics
- Scientific Computing
- Research and Development
- United Kingdom
apis:
- aid: tokamak-energy:tokamakenergy-com-website-wordpress-rest
  name: Tokamak Energy Website (WordPress REST)
  description: 'The public WordPress REST API (wp-json) of the Tokamak Energy website at tokamakenergy.com: the route index
    of the site''s content management system, catalogued as one site surface rather than as separate APIs.'
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - WordPress
  x-surface: platform-generated
  properties:
  - type: Documentation
    url: https://tokamakenergy.com/wp-json
  x-platform: wordpress
  x-platform-surface: rest
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/tokamak-energy-plans-pricing.yml
- type: RateLimits
  url: rate-limits/tokamak-energy-rate-limits.yml
- type: Website
  url: https://tokamakenergy.com/
- type: About
  url: https://tokamakenergy.com/about-us/
- type: Blog
  url: https://tokamakenergy.com/latest-news/
- type: BlogRSS
  url: https://tokamakenergy.com/feed/
- type: Support
  url: https://tokamakenergy.com/contact-us/
- type: PrivacyPolicy
  url: https://tokamakenergy.com/privacy/
- type: GitHubOrganization
  url: https://github.com/tokamak-energy
- type: Careers
  url: https://tokamakenergy.com/careers-at-tokamak-energy-fusion-energy/
- type: Technology
  url: https://tokamakenergy.com/our-fusion-energy-and-hts-technology/
- type: Videos
  url: https://tokamakenergy.com/videos/
- type: Authentication
  url: authentication/tokamak-energy-authentication.yml
- type: Conventions
  url: conventions/tokamak-energy-conventions.yml
- type: ErrorCatalog
  url: errors/tokamak-energy-problem-types.yml
- type: Conformance
  url: conformance/tokamak-energy-conformance.yml
- type: Lifecycle
  url: lifecycle/tokamak-energy-lifecycle.yml
- type: DataModel
  url: data-model/tokamak-energy-data-model.yml
- type: Packages
  url: packages/tokamak-energy-packages.yml
- type: LLMsTxt
  url: llms/tokamak-energy-llms.txt
- type: DomainSecurity
  url: security/tokamak-energy-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-30'
  status: enriched
  artifacts_added: 44
  pass: local-v1
x-coverage:
  state: covered
  reason: no-machine-readable-spec
  detail: 'Tokamak Energy publishes no product API, developer portal, SDK, MCP server or OpenAPI of its own — it is a fusion
    and HTS magnet hardware company — but the profile is not thin: the WordPress REST content API behind tokamakenergy.com
    is live, anonymous and fully describable, and nine OpenAPI documents covering 22 operations were derived from the route
    descriptors and OPTIONS item schemas the host itself publishes at /wp-json/.'
  evidence:
  - url: https://tokamakenergy.com/wp-json/
    status: 200
  - url: https://tokamakenergy.com/openapi.json
    status: 404
  - url: https://tokamakenergy.com/.well-known/agent-card.json
    status: 404
  - url: https://tokamakenergy.com/.well-known/security.txt
    status: 404
  - url: https://pypi.org/pypi/gsfit/json
    status: 200
  checked: '2026-08-30'

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