Commonwealth Fusion Systems
Commonwealth Fusion Systems (CFS) is a commercial fusion energy company headquartered in Devens, Massachusetts and spun out of the MIT Plasma Science and Fusion Center in 2018. CFS is developing tokamak-based fusion systems built around high-temperature superconducting (HTS) REBCO magnet technology that enables substantially smaller, faster, and lower-cost fusion machines than prior generations. The company's technology pipeline starts with SPARC, a net-energy demonstration tokamak under construction at the Devens campus, and continues with ARC, the planned first commercial fusion power plant, sited in Chesterfield County, Virginia in partnership with Dominion Energy and targeted to deliver approximately 400 MW of electricity to the grid in the early 2030s. CFS is backed by a deep investor base including Breakthrough Energy Ventures, Eni, Equinor, Google, Temasek, Tiger Global, Khosla Ventures, Bill Gates, Soros Fund Management, Lowercase Capital, John Doerr, and TIME Ventures. CFS does not publish a public developer API or SDK; engagement is via partnerships, careers, and investor channels.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Commonwealth Fusion Systems the way a machine reads it — 1 machine-readable artifact, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Commonwealth Fusion Systems scores 9.3/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Commonwealth Fusion Systems
Each block below is one kind of artifact we hold for Commonwealth Fusion Systems. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Commonwealth Fusion Systems — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Access & Security 1
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 1
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 10
The organization behind the API
Scroll within the panel for all 10 ·
Other 5
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/commonwealth-fusion-systems · machine-readable index on apis.io