# Tokamak Energy

> Tokamak Energy is a private fusion energy company founded in 2009 as a spinout from the UK Atomic Energy Authority, headquartered at Milton Park, Oxfordshire, with subsidiaries in the USA and Japan and over 300 employees. It runs a two-track strategy — commercial fusion via compact spherical tokamaks, and high temperature superconducting (HTS) magnet technology as a business in its own right. Its ST40 is the world's highest field spherical tokamak and is undergoing a USD 52 million upgrade co-funded with the US DOE and the UK DESNZ; Demo4 was the first HTS fusion magnet system to reach fusion-relevant fields (2025); the company is Magnet Systems Partner for the UK STEP programme under a GBP 70 million contract to 2029. Three integrated businesses: TE Magnetics, Ridgway Machines and Fusion.

## What Tokamak Energy does NOT publish

Read this before looking for one. Tokamak Energy is a fusion and superconducting hardware company,
not a software vendor. There is **no product API, no developer portal, no developer signup, no API
keys, no SDK, no CLI, no MCP server, no A2A agent card, no OpenAPI document, no pricing page and no
status page.** Probes on 2026-08-30 returned 404 for every `/.well-known/` path on the only host,
and no `api.`, `developer.`, `docs.` or `data.` subdomain resolves in DNS. This is an honest zero,
not a gap in research.

## The one machine-readable interface that does exist

tokamakenergy.com runs on WordPress and exposes the WordPress core REST API. It is anonymously
readable, read-only for unauthenticated callers, and incidental to the corporate website rather
than a product. It is genuinely useful for one thing: reading Tokamak Energy's own news, pages and
press media as structured JSON instead of scraping HTML.

- [API root / discovery document](https://tokamakenergy.com/wp-json/): namespaces, the full route table with per-argument type, enum, default, minimum and maximum, and the supported authentication methods. Start here.
- [News posts](https://tokamakenergy.com/wp-json/wp/v2/posts): 84 published items (2026-08-30). Supports `search`, `categories`, `after`, `modified_after`, `_fields`, `_embed`.
- [Pages](https://tokamakenergy.com/wp-json/wp/v2/pages): 26 static pages — About Us, technology, TE Magnetics, careers, Why Fusion, USA, Japan, Videos, Contact, Privacy.
- [Media library](https://tokamakenergy.com/wp-json/wp/v2/media): 853 assets including ST40, Demo4 and TE Magnetics imagery, diagrams and PDFs.
- [Area items](https://tokamakenergy.com/wp-json/wp/v2/area-item): 27 items in a site-specific custom post type used to compose the technology and careers areas.
- [Categories](https://tokamakenergy.com/wp-json/wp/v2/categories): 8 terms. The `post_tag` taxonomy is registered but empty — do not filter on tags.
- [Search](https://tokamakenergy.com/wp-json/wp/v2/search): full-text across 137 searchable objects, returning id/title/url/type/subtype.
- [Authors](https://tokamakenergy.com/wp-json/wp/v2/users): 4 public author records.
- [oEmbed](https://tokamakenergy.com/wp-json/oembed/1.0/embed): oEmbed 1.0 provider endpoint for any Tokamak Energy URL.

## How to call it

- Base URL: `https://tokamakenergy.com/wp-json`
- No key, no signup, no OAuth. Authentication exists only as WordPress Application Passwords (HTTP Basic) for site operators, and is required for write operations and the `edit` context.
- Pagination is `page` + `per_page` (default 10, max 100), with `X-WP-Total` and `X-WP-TotalPages` response headers and an RFC 8288 `Link` header carrying `rel="next"`. Follow the header; do not increment `page`.
- Trim responses with `_fields=id,title,link,date` — rendered HTML bodies dominate the payload otherwise. Inline related objects with `_embed`.
- Errors are the flat WordPress envelope `{"code":…,"message":…,"data":{"status":…}}` with content-type `application/json`. **Not RFC 9457.** Branch on `code`; `message` is localised. `rest_forbidden` (401/403) is permanent for anonymous callers — do not retry.
- **No rate limit is published and no `RateLimit-*` or `Retry-After` header is returned.** You get no warning before a ceiling. `robots.txt` requests `Crawl-delay: 2`; honour it.
- **No `ETag`, `Last-Modified` or `Cache-Control`.** Conditional requests are unavailable; detect change by comparing the `modified` field.
- Everything above is a safe GET. There is no anonymous write surface, so idempotency, dry-run and reversibility are all not-applicable here.

## Open source

Tokamak Energy's real public engineering output is code, not an API — released through the
[tokamak-energy GitHub organisation](https://github.com/tokamak-energy).

- [gsfit](https://github.com/tokamak-energy/gsfit): Grad-Shafranov equilibrium reconstruction. Published to PyPI as `gsfit` 0.0.10 (2026-08-05); repository last pushed 2026-08-28.
- [rtgsfit](https://github.com/tokamak-energy/rtgsfit): real-time equilibrium reconstruction in C. Source only, no registry release.
- [FORGE](https://github.com/tokamak-energy/FORGE): divertor magnetic geometry optimisation via simulated annealing. Fork.
- [freegs-gsfit](https://github.com/tokamak-energy/freegs-gsfit): free boundary Grad-Shafranov solver. Fork, dormant since 2023.

These are scientific computing libraries, **not** SDKs for any Tokamak Energy API.

## Company links

- [Website](https://tokamakenergy.com/)
- [About us](https://tokamakenergy.com/about-us/)
- [Our fusion energy and HTS technology](https://tokamakenergy.com/our-fusion-energy-and-hts-technology/)
- [TE Magnetics](https://tokamakenergy.com/our-fusion-energy-and-hts-technology/te-magnetics/)
- [Why fusion](https://tokamakenergy.com/why-fusion/)
- [News](https://tokamakenergy.com/latest-news/) · [RSS](https://tokamakenergy.com/feed/)
- [Videos](https://tokamakenergy.com/videos/)
- [Careers](https://tokamakenergy.com/careers-at-tokamak-energy-fusion-energy/) · [Current vacancies](https://tokamakenergy.com/current-vacancies/)
- [Contact](https://tokamakenergy.com/contact-us/)
- [Privacy](https://tokamakenergy.com/privacy/)
- [GitHub](https://github.com/tokamak-energy)

## Provenance

Generated by API Evangelist on 2026-08-30 from live probes of tokamakenergy.com and its WordPress
REST API, the tokamak-energy GitHub organisation, PyPI, and the company's own About page. This file
is not published by Tokamak Energy. Independent third-party profile:
https://github.com/api-evangelist/tokamak-energy