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 publishes 9 APIs on the APIs.io network, including Posts API, Pages API, Media API, and 6 more. Tagged areas include Company, Fusion Energy, Energy, Superconductors, and HTS Magnets.

Tokamak Energy’s developer surface includes engineering blog, support, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

30.9/100 thin ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-09-01 · rubric v0.17.2

9 APIs

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

Kin Score

Kin Score How this is scored →
scored 2026-09-01 · rubric v0.17.2

Composite quality — 30.9/100 · thin

Contract Quality 12.3 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 6.3 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 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/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

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

Rate Limits 1

Documented rate limits and quota policies.

Tokamak Energy Rate Limits

0 limits

RATE LIMITS

Examples 9

Example request and response payloads for these APIs.

Scroll for all 9

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 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

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
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
- Content
- United Kingdom
apis:
- aid: tokamak-energy:tokamak-energy-posts-api
  name: Tokamak Energy Posts API
  description: Public, unauthenticated read access to the Tokamak Energy news archive behind tokamakenergy.com/latest-news/
    via the WordPress core REST API. Verified live at 84 published posts on 2026-08-30.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Posts
  - Content
  - News
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-posts-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-posts-example.json
  - type: Overlay
    url: overlays/tokamak-energy-posts-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
  - type: Conformance
    url: conformance/tokamak-energy-conformance.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-pages-api
  name: Tokamak Energy Pages API
  description: Public, unauthenticated read access to the static pages of tokamakenergy.com — About Us, Our Fusion Energy
    and HTS Technology, TE Magnetics, Careers, Early Careers, Current Vacancies, STEM Outreach, Why Fusion, USA, Japan, Videos,
    Contact Us and Privacy. Verified live at 26 published pages on 2026-08-30.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Pages
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-pages-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-pages-example.json
  - type: Overlay
    url: overlays/tokamak-energy-pages-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
  - type: Conformance
    url: conformance/tokamak-energy-conformance.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-media-api
  name: Tokamak Energy Media API
  description: Public, unauthenticated read access to the Tokamak Energy media library — images, diagrams, PDFs and video
    assets attached to news posts and pages, including ST40, Demo4 and TE Magnetics imagery. Verified live at 853 media items
    on 2026-08-30.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Media
  - Content
  - Image
  tags_raw:
  - Media
  - Content
  - Images
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-media-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-media-example.json
  - type: Overlay
    url: overlays/tokamak-energy-media-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-area-items-api
  name: Tokamak Energy Area Items API
  description: Public, unauthenticated read access to the site-specific `area-item` custom post type behind tokamakenergy.com
    — the structured content blocks Tokamak Energy uses to compose its technology, careers and about areas. Verified live
    at 27 items on 2026-08-30. This content type is registered by Tokamak Energy's own site, not by WordPress core.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Area Items
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-area-items-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-area-item-example.json
  - type: Overlay
    url: overlays/tokamak-energy-area-items-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-taxonomy-api
  name: Tokamak Energy Taxonomy API
  description: Public, unauthenticated read access to the classification terms Tokamak Energy applies to its news archive
    — the category taxonomy (8 terms live on 2026-08-30) and the post tag taxonomy (0 terms live; registered and callable
    but currently unused).
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Taxonomy
  - Categories
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-taxonomy-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-categories-example.json
  - type: Overlay
    url: overlays/tokamak-energy-taxonomy-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-search-api
  name: Tokamak Energy Search API
  description: Public, unauthenticated full-text search across every searchable object on tokamakenergy.com — posts, pages
    and the area-item custom type — returning a lightweight result envelope (id, title, url, type, subtype). Verified live
    at 137 searchable objects on 2026-08-30.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Search
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-search-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-search-example.json
  - type: Overlay
    url: overlays/tokamak-energy-search-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-authors-api
  name: Tokamak Energy Authors API
  description: Public, unauthenticated read access to the post authors of the Tokamak Energy news archive. Verified live at
    4 authors on 2026-08-30. WordPress exposes only the public author view — name, slug, description, avatar and archive link
    — anonymously; email addresses and roles require authentication.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Authors
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-authors-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-authors-example.json
  - type: Overlay
    url: overlays/tokamak-energy-authors-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: DataModel
    url: data-model/tokamak-energy-data-model.yml
- aid: tokamak-energy:tokamak-energy-discovery-api
  name: Tokamak Energy Discovery API
  description: The machine-readable description of the Tokamak Energy content API itself — the REST root document, the registered
    content types (including the site-specific `portfolio` and `area-item` types), the registered taxonomies and the publication
    statuses. An agent can start at GET /wp-json/ and reach every other operation in this profile without out-of-band knowledge.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - Discovery
  - Metadata
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-discovery-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-types-example.json
  - type: Overlay
    url: overlays/tokamak-energy-discovery-api-overlay.yaml
  - type: Authentication
    url: authentication/tokamak-energy-authentication.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
  - type: Conventions
    url: conventions/tokamak-energy-conventions.yml
  - type: Conformance
    url: conformance/tokamak-energy-conformance.yml
  - type: Lifecycle
    url: lifecycle/tokamak-energy-lifecycle.yml
- aid: tokamak-energy:tokamak-energy-oembed-api
  name: Tokamak Energy oEmbed API
  description: Public, unauthenticated oEmbed 1.0 provider endpoint for tokamakenergy.com. Given the URL of any Tokamak Energy
    post or page it returns an oEmbed rich/link response suitable for embedding the item in a third-party surface. Verified
    live on 2026-08-30.
  humanURL: https://tokamakenergy.com/wp-json/
  baseURL: https://tokamakenergy.com/wp-json
  tags:
  - oEmbed
  - Embedding
  - Content
  properties:
  - type: OpenAPI
    url: openapi/tokamak-energy-oembed-api-openapi.yml
  - type: Examples
    url: examples/tokamak-energy-oembed-example.json
  - type: Overlay
    url: overlays/tokamak-energy-oembed-api-overlay.yaml
  - type: Conformance
    url: conformance/tokamak-energy-conformance.yml
  - type: ErrorCatalog
    url: errors/tokamak-energy-problem-types.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- 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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