Jimmy

Jimmy (Jimmy Energy SAS) is a French nuclear-technology company, founded in 2020 as a spin-off from the CEA, that designs, builds and operates small modular high-temperature reactors it calls thermal generators — helium-cooled HTR units the company describes as bus-sized — to deliver carbon-free process heat directly to industrial sites under secured 20-year supply-and-price contracts. Jimmy is headquartered in Paris with an industrial platform at Le Creusot in Burgundy, targets food, paper, sugar and chemicals producers that currently burn natural gas for process heat, and filed the first SMR creation-authorization request in France for a generator at the Cristanol site in Bazancourt. Jimmy sells heat, not software: it publishes no API, developer portal, SDK or machine-readable specification, and this profile records that measured absence rather than assuming it.

Jimmy is profiled on the APIs.io network. Tagged areas include Company, Climate Tech, Energy, Nuclear, and Small Modular Reactor.

Jimmy’s developer surface includes engineering blog and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

7.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Climate Tech Energy Nuclear Small Modular Reactor Industrial Heat Decarbonization Deep Tech Manufacturing France

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 7.4/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.3 / 9

Regulatory Posture 2.0 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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/jimmy: 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 →

Security Posture 1

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

Jimmy Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: jimmy
name: Jimmy
description: 'Jimmy (Jimmy Energy SAS) is a French nuclear-technology company, founded in 2020 as a spin-off from the CEA,
  that designs, builds and operates small modular high-temperature reactors it calls thermal generators — helium-cooled HTR
  units the company describes as bus-sized — to deliver carbon-free process heat directly to industrial sites under secured
  20-year supply-and-price contracts. Jimmy is headquartered in Paris with an industrial platform at Le Creusot in Burgundy,
  targets food, paper, sugar and chemicals producers that currently burn natural gas for process heat, and filed the first
  SMR creation-authorization request in France for a generator at the Cristanol site in Bazancourt. Jimmy sells heat, not
  software: it publishes no API, developer portal, SDK or machine-readable specification, and this profile records that measured
  absence rather than assuming it.'
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-09-02'
  method: derived
image: https://cdn.prod.website-files.com/63497bb96fe7a9a8fa88990d/6352bfaf482c556de506e26e_Jimmy-logo.svg
url: https://raw.githubusercontent.com/api-evangelist/jimmy/refs/heads/main/apis.yml
x-type: company
x-source: serena-portfolio
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-08-17'
modified: '2026-08-17'
tags:
- Company
- Climate Tech
- Energy
- Nuclear
- Small Modular Reactor
- Industrial Heat
- Decarbonization
- Deep Tech
- Manufacturing
- France
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-08-17'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: not-a-software-company
  detail: Jimmy manufactures and operates nuclear high-temperature thermal generators and sells industrial heat on 20-year
    contracts, so there is nothing to expose as an API — api., docs. and developer.jimmy-energy.eu do not resolve in DNS and
    the Webflow marketing site 404s on every spec and /.well-known/ path probed.
  evidence:
  - url: https://www.jimmy-energy.eu/
    status: 200
  - url: https://www.jimmy-energy.eu/openapi.json
    status: 404
  - url: https://www.jimmy-energy.eu/.well-known/agent-card.json
    status: 404
  - url: https://www.jimmy-energy.eu/llms.txt
    status: 404
  checked: '2026-08-17'
common:
- type: DomainSecurity
  url: security/jimmy-domain-security.yml
- type: Website
  url: https://www.jimmy-energy.eu/
- type: LLMsTxt
  name: Generated llms.txt for Jimmy
  url: llms/jimmy-llms.txt
- type: GitHubOrganization
  name: Jimmy-Energy on GitHub (two forks of third-party Python utilities; no first-party code)
  url: https://github.com/Jimmy-Energy
- type: Blog
  name: Actualités (company news)
  url: https://www.jimmy-energy.eu/actualites
- type: PrivacyPolicy
  name: Données personnelles (GDPR) notice, published inside the mentions légales page
  url: https://www.jimmy-energy.eu/mentions-legales
- type: LinkedIn
  url: https://www.linkedin.com/company/jimmy-energy/
- type: X
  url: https://twitter.com/Jimmy_Energy_

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