E.ON Next
E.ON Next Energy Limited is the United Kingdom retail supply arm of the E.ON Group, formed after E.ON's 2019 acquisition of npower and serving roughly five million British households and small businesses with electricity, gas, smart meters, solar, home batteries, heat pumps and EV charging tariffs. It sits at the retail end of the GB energy value chain — buying wholesale, settling through Elexon, reading SMETS2 smart meters over the licensed Smart DCC network, and billing the customer — and it runs its entire operation on Kraken, the API-first, GraphQL-based energy operating system licensed from Kraken Technologies (Octopus Energy Group), onto which 5.8 million customers were migrated between June 2020 and June 2022. Its API posture is the exact opposite of its platform's reputation: the Kraken architecture underneath is API-first, but almost nothing is published outward. There is no developer portal, no API documentation, no OpenAPI, and no third-party route to a customer's usage or billing data; developer.eonnext.com and docs.eonnext.com do not resolve, and both api.eonnext.com and data.eonnext.com answer every path with an unauthenticated AWS API Gateway 403 "Missing Authentication Token". The one machine-readable contract E.ON Next does publish is its customer identity layer — auth.eonnext.com, an Auth0 CIAM tenant, serves a complete anonymous OpenID Connect / RFC 8414 discovery document and JWKS — which describes how a customer signs in, not how a developer gets access. Britain mandated the metering infrastructure, not the data right: E.ON Next is bound by the Smart Energy Code and the DCC, which is live and implemented, but no consumer data-portability mandate equivalent to Australia's CDR or Ontario's Green Button applies to it, and none of the open GB market data (NESO Carbon Intensity, Elexon BSC, DNO open-data portals) originates here. Consumer data is closed, market data is published by other parties, and the only public contract is identity.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles E.ON Next the way a machine reads it — 5 machine-readable artifacts across 1 API, 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 — E.ON Next scores 26.5/100 (thin), with a separate agent-readiness read of 15/100 (agent aware). 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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
Put this on your own site. The badge is drawn live from E.ON Next's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/eon-next/"
title="E.ON Next on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/eon-next.svg"
alt="E.ON Next Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/eon-next/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/eon-next/"
title="E.ON Next on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/eon-next/card.svg"
alt="E.ON Next Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile E.ON Next
Each block below is one kind of artifact we hold for E.ON Next. 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.
APIs 1
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
E.ON Next Customer Identity (OpenID Connect)
The OpenID Connect / OAuth 2.0 authorization server that authenticates E.ON Next customers into the online account and mobile app. It is an Auth0-hosted E.ON group CIAM tenant (...
Security Posture 3
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.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Resources
Every other property we hold for E.ON Next — 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.
Get Started 1
Portal, sign-up, and the first successful call
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Access & Security 6
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/eon-next · machine-readable index on apis.io
This is an independent, third-party profile of E.ON Next, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
·
Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and
you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.