# E.ON Next

**Canonical:** https://apis.io/providers/eon-next/  
**Website:** https://www.eonnext.com/  
**APIs profiled:** 1

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.

## Kin Score — 27.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 27.6).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 19.0 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

Regulatory layer — **Energy & Utilities**: 59.5 (matched via tags).

## Agent readiness — 11.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## APIs (1)

- **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 (3)

- **Eon Next Authentication** — openIdConnect/oauth2 · 2 schemes
- **Eon Next Domain Security** — TLSv1.3 · HSTS · DMARC
- **Eon Next Vulnerability Disclosure** — Hackerone · security.txt · contact published

## Tags

Energy, United Kingdom, Utilities, Electricity, Gas, Smart Metering, Energy Retail, Kraken, Solar, EV Charging, Identity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/eon-next/). Scores are computed from the provider's own public artifacts under a published rubric.