Utilita

Utilita Energy is a United Kingdom household electricity and gas supplier founded in 2003 and headquartered in Eastleigh, Hampshire, specialising in smart Pay As You Go (prepayment) energy for roughly 800,000 mostly lower-income homes. It sits at the retail end of the GB energy value chain — buying wholesale, holding an Ofgem supply licence, and acceding to the Smart Energy Code as a DCC user — and it was the first company in Great Britain to install a residential smart electricity meter (2005) and a combined smart gas and electricity system (2008). Its ENERGY DATA posture is closed on every axis. Britain mandated the smart-meter INFRASTRUCTURE (the Smart DCC, the Smart Energy Code, SMETS1/SMETS2 devices) rather than a consumer data right, so no CDR- or Green-Button-style obligation compels Utilita to publish a customer data API, and it publishes none: no developer portal, no customer usage API, and no open market or grid data — developer., developers., api., docs. and data.utilita.co.uk do not resolve, and /developers, /api, /docs, /data and /openapi.json all return 404. Customer usage and top-up data reaches people only through the My Utilita web portal and mobile app behind an account login; third parties reach GB smart-meter data through the DCC "Other User" route under the Data Access and Privacy Framework, not through Utilita. Utilita does, however, run one genuine public API: the anonymous, CORS-open, documented Utilita Status API at status.utilita.co.uk/api/v2, which reports the live health of 21 tracked components — SMETS1/SMETS2 smart meters, Guest Payments, Open Banking, PayPoint and PayZone top-up channels, the My Utilita app and web portal, Power-up, the websites, the contact centre, smart meter installations and the smart metering network — along with incident and scheduled-maintenance history and self-serve webhook, RSS and Atom notifications. Recorded here as an honest closed-supplier baseline for the UK energy sector, with an operational-transparency surface that is real and usable.

Utilita publishes 4 APIs on the APIs.io network, including Components API, Incidents API, Scheduled Maintenance API, and 1 more. Tagged areas include Energy, United Kingdom, Utilities, Electricity, and Gas.

The Utilita catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Utilita’s developer surface includes documentation, API reference, code examples, authentication, signup flow, pricing, support, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.5/100 developing ▬ flat Agent 29/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Energy United Kingdom Utilities Electricity Gas Smart Metering Prepayment Energy Retail Status Operational Transparency

Kin Score

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

Composite quality — 49.5/100 · developing

Contract Quality 13.7 / 21

Developer Ergonomics 6.4 / 17

Access Clarity 7.6 / 17

Operational Transparency 2.6 / 11

Contract Governance 0.5 / 10

Discoverability 5.8 / 9

Regulatory Posture 9.3 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/utilita: 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 →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Utilita Components API

The individual Utilita services tracked on the status page.

Utilita Incidents API

Unplanned service incidents and their update timeline.

Utilita Scheduled Maintenance API

Planned maintenance windows.

Utilita Status API

Overall page status and rolled-up summary.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Utilita Status API

OPEN COLLECTION

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Utilita Status Webhooks

ASYNCAPI

Examples 6

Example request and response payloads for these APIs.

Utilita Status Active Maintenances

2 fields

EXAMPLE

Utilita Status Components

2 fields

EXAMPLE

Utilita Status Status

2 fields

EXAMPLE

Utilita Status Summary

5 fields

EXAMPLE

Utilita Status Unresolved Incidents

2 fields

EXAMPLE

Utilita Status Upcoming Maintenances

2 fields

EXAMPLE

Security Posture 2

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

Utilita Authentication

none · 1 scheme

SECURITY

Utilita Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

CustomerPortal

CustomerPortal

SignUp

SignUp

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

WellKnownProbe

AgentSkill

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

Examples

Examples

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

StatusPage

Help

Support

Community

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 6

The organization behind the API

Website

About

Blog

Careers

Press

LinkedIn

Other 1

Properties that don't map to a standard resource type

CookiePolicy

CookiePolicy

Source (apis.yml)

aid: utilita
url: https://raw.githubusercontent.com/api-evangelist/utilita/refs/heads/main/apis.yml
name: Utilita
kind: company
description: 'Utilita Energy is a United Kingdom household electricity and gas supplier founded in 2003 and headquartered
  in Eastleigh, Hampshire, specialising in smart Pay As You Go (prepayment) energy for roughly 800,000 mostly lower-income
  homes. It sits at the retail end of the GB energy value chain — buying wholesale, holding an Ofgem supply licence, and acceding
  to the Smart Energy Code as a DCC user — and it was the first company in Great Britain to install a residential smart electricity
  meter (2005) and a combined smart gas and electricity system (2008). Its ENERGY DATA posture is closed on every axis. Britain
  mandated the smart-meter INFRASTRUCTURE (the Smart DCC, the Smart Energy Code, SMETS1/SMETS2 devices) rather than a consumer
  data right, so no CDR- or Green-Button-style obligation compels Utilita to publish a customer data API, and it publishes
  none: no developer portal, no customer usage API, and no open market or grid data — developer., developers., api., docs.
  and data.utilita.co.uk do not resolve, and /developers, /api, /docs, /data and /openapi.json all return 404. Customer usage
  and top-up data reaches people only through the My Utilita web portal and mobile app behind an account login; third parties
  reach GB smart-meter data through the DCC "Other User" route under the Data Access and Privacy Framework, not through Utilita.
  Utilita does, however, run one genuine public API: the anonymous, CORS-open, documented Utilita Status API at status.utilita.co.uk/api/v2,
  which reports the live health of 21 tracked components — SMETS1/SMETS2 smart meters, Guest Payments, Open Banking, PayPoint
  and PayZone top-up channels, the My Utilita app and web portal, Power-up, the websites, the contact centre, smart meter
  installations and the smart metering network — along with incident and scheduled-maintenance history and self-serve webhook,
  RSS and Atom notifications. Recorded here as an honest closed-supplier baseline for the UK energy sector, with an operational-transparency
  surface that is real and usable.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-02'
  method: derived
image: https://utilita.co.uk/favicon.ico
tags:
- Energy
- United Kingdom
- Utilities
- Electricity
- Gas
- Smart Metering
- Prepayment
- Energy Retail
- Status
- Operational Transparency
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.23'
apis:
- aid: utilita:utilita-components-api
  name: Utilita Components API
  description: The individual Utilita services tracked on the status page.
  humanURL: https://status.utilita.co.uk/api
  baseURL: https://status.utilita.co.uk/api/v2
  tags:
  - Components
  properties:
  - type: OpenAPI
    url: openapi/utilita-components-api-openapi.yml
  - type: Documentation
    url: https://status.utilita.co.uk/api
  - type: APIReference
    url: https://status.utilita.co.uk/api
  - type: Examples
    url: examples/_index.yml
  - type: Webhooks
    url: asyncapi/utilita-status-webhooks.yml
  - type: StatusPage
    url: https://status.utilita.co.uk/
  - type: Authentication
    url: authentication/utilita-authentication.yml
  - type: Conventions
    url: conventions/utilita-conventions.yml
  - type: ErrorCatalog
    url: errors/utilita-problem-types.yml
  - type: DataModel
    url: data-model/utilita-data-model.yml
  - type: Lifecycle
    url: lifecycle/utilita-lifecycle.yml
- aid: utilita:utilita-incidents-api
  name: Utilita Incidents API
  description: Unplanned service incidents and their update timeline.
  humanURL: https://status.utilita.co.uk/api
  baseURL: https://status.utilita.co.uk/api/v2
  tags:
  - Incidents
  properties:
  - type: OpenAPI
    url: openapi/utilita-incidents-api-openapi.yml
  - type: Documentation
    url: https://status.utilita.co.uk/api
  - type: APIReference
    url: https://status.utilita.co.uk/api
  - type: Examples
    url: examples/_index.yml
  - type: Webhooks
    url: asyncapi/utilita-status-webhooks.yml
  - type: StatusPage
    url: https://status.utilita.co.uk/
  - type: Authentication
    url: authentication/utilita-authentication.yml
  - type: Conventions
    url: conventions/utilita-conventions.yml
  - type: ErrorCatalog
    url: errors/utilita-problem-types.yml
  - type: DataModel
    url: data-model/utilita-data-model.yml
  - type: Lifecycle
    url: lifecycle/utilita-lifecycle.yml
- aid: utilita:utilita-scheduled-maintenance-api
  name: Utilita Scheduled Maintenance API
  description: Planned maintenance windows.
  humanURL: https://status.utilita.co.uk/api
  baseURL: https://status.utilita.co.uk/api/v2
  tags:
  - Scheduled Maintenance
  properties:
  - type: OpenAPI
    url: openapi/utilita-scheduled-maintenance-api-openapi.yml
  - type: Documentation
    url: https://status.utilita.co.uk/api
  - type: APIReference
    url: https://status.utilita.co.uk/api
  - type: Examples
    url: examples/_index.yml
  - type: Webhooks
    url: asyncapi/utilita-status-webhooks.yml
  - type: StatusPage
    url: https://status.utilita.co.uk/
  - type: Authentication
    url: authentication/utilita-authentication.yml
  - type: Conventions
    url: conventions/utilita-conventions.yml
  - type: ErrorCatalog
    url: errors/utilita-problem-types.yml
  - type: DataModel
    url: data-model/utilita-data-model.yml
  - type: Lifecycle
    url: lifecycle/utilita-lifecycle.yml
- aid: utilita:utilita-status-api
  name: Utilita Status API
  description: Overall page status and rolled-up summary.
  humanURL: https://status.utilita.co.uk/api
  baseURL: https://status.utilita.co.uk/api/v2
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/utilita-status-api-openapi.yml
  - type: Documentation
    url: https://status.utilita.co.uk/api
  - type: APIReference
    url: https://status.utilita.co.uk/api
  - type: Examples
    url: examples/_index.yml
  - type: Webhooks
    url: asyncapi/utilita-status-webhooks.yml
  - type: StatusPage
    url: https://status.utilita.co.uk/
  - type: Authentication
    url: authentication/utilita-authentication.yml
  - type: Conventions
    url: conventions/utilita-conventions.yml
  - type: ErrorCatalog
    url: errors/utilita-problem-types.yml
  - type: DataModel
    url: data-model/utilita-data-model.yml
  - type: Lifecycle
    url: lifecycle/utilita-lifecycle.yml
common:
- type: AgentSkill
  url: skills/utilita-check-service-status.md
- type: Website
  url: https://utilita.co.uk/
- type: About
  url: https://utilita.co.uk/about-us
- type: Documentation
  url: https://status.utilita.co.uk/api
- type: APIReference
  url: https://status.utilita.co.uk/api
- type: StatusPage
  url: https://status.utilita.co.uk/
- type: OpenAPI
  url: openapi/utilita-status-openapi.yml
- type: Examples
  url: examples/_index.yml
- type: Webhooks
  url: asyncapi/utilita-status-webhooks.yml
- type: Authentication
  url: authentication/utilita-authentication.yml
- type: Conventions
  url: conventions/utilita-conventions.yml
- type: ErrorCatalog
  url: errors/utilita-problem-types.yml
- type: DataModel
  url: data-model/utilita-data-model.yml
- type: Lifecycle
  url: lifecycle/utilita-lifecycle.yml
- type: Conformance
  url: conformance/utilita-conformance.yml
- type: DomainSecurity
  url: security/utilita-domain-security.yml
- type: WellKnownProbe
  url: well-known/utilita-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/utilita-llms.txt
- type: CustomerPortal
  url: https://my.utilita.co.uk/login
- type: SignUp
  url: https://join.utilita.co.uk/
- type: Pricing
  url: https://utilita.co.uk/tariffs
- type: Help
  url: https://utilita.co.uk/help
- type: Support
  url: https://utilita.co.uk/contact
- type: Community
  url: https://community.utilita.co.uk/
- type: Blog
  url: https://utilita.co.uk/blog
- type: TermsOfService
  url: https://utilita.co.uk/terms
- type: PrivacyPolicy
  url: https://utilita.co.uk/privacy-notice
- type: CookiePolicy
  url: https://utilita.co.uk/cookie-policy
- type: Careers
  url: https://utilita.co.uk/careers
- type: Press
  url: https://www.luxion.group/utilita-press-corner
- type: LinkedIn
  url: https://www.linkedin.com/company/utilita-energy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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