TerraPower
TerraPower is a Bellevue, Washington-based advanced nuclear innovation company founded in 2006 with Bill Gates as founder and chair. Its flagship product is the Natrium reactor, a 345 MWe sodium-cooled fast reactor co-developed with GE Vernova Hitachi Nuclear Energy and paired with an integrated molten salt energy storage system that can boost output to 500 MWe for up to five-plus hours to follow renewable grid load. TerraPower broke ground in 2024 on the first commercial Natrium demonstration plant in Kemmerer, Wyoming under the U.S. Department of Energy's Advanced Reactor Demonstration Program (ARDP), a 50/50 cost-share with up to $2 billion in federal funding. The company's second business line, TerraPower Isotopes (TPI), produces research-grade actinium-225 — an alpha-emitting radionuclide used in targeted alpha therapy for cancer — from DOE thorium-229 stockpiles in partnership with Isotek, with a lab in Everett WA and a cGMP manufacturing facility under construction in Philadelphia's Bellwether District. TerraPower has no commercial developer API, SDK, or public partner integration platform; its revenue model is reactor sales, plant operation, and isotope supply contracts with pharmaceutical partners including Aktis Oncology, Advanced Accelerator Applications, Cardinal Health, and Point Biopharma. The company does maintain a meaningful open-source nuclear engineering footprint on GitHub — most notably ARMI (Advanced Reactor Modeling Interface), an Apache 2.0 Python framework for nuclear reactor design and analysis automation used internally to design Natrium and made available to the wider reactor engineering community.
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 TerraPower 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 — TerraPower scores 7.9/100 (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 TerraPower
Each block below is one kind of artifact we hold for TerraPower. 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 TerraPower — 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.
Documentation 1
Reference material describing how the API behaves
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 2
Status, limits, changes, and where to get help
Company 6
The organization behind the API
Other 6
Properties that don't map to a standard resource type
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