Terna

Terna S.p.A. is Italy’s leading electricity transmission system operator, responsible for managing the high‑voltage grid, ensuring reliable power supply, and driving the energy transition toward renewable sources. The company operates over 75,000 km of transmission lines, connects with neighboring countries, and invests billions in digital innovation and sustainability initiatives.

Terna is listed with 7 APIs on the APIs.io network, including Fees API, Generation API, Ifees API, and 4 more. Tagged areas include Energy, Transmission, Infrastructure, Italy, and Renewables.

The Terna catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Terna’s developer surface includes authentication, documentation, getting-started guide, support, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

27.5/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessSelf serve

7 APIs

Energy Transmission Infrastructure Italy Renewables

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 27.5/100 · thin

Contract Quality 4.9 / 19

Developer Ergonomics 7.1 / 15

Access Clarity 1.6 / 15

Operational Transparency 0.0 / 10

Contract Governance 1.8 / 9

Discoverability 5.4 / 8

Regulatory Posture 2.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 26.1 — up to +18.5 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/terna/apis.yml: open an issue on github.com/api-evangelist/terna to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

Terna Fees API

The Fees API from Terna — 1 operation(s) for fees.

Terna Generation API

The Generation API from Terna — 1 operation(s) for generation.

Terna Ifees API

The Ifees API from Terna — 1 operation(s) for ifees.

Terna Load API

The Load API from Terna — 1 operation(s) for load.

Terna Market API

The Market API from Terna — 3 operation(s) for market.

Terna Public API

The Public Api API from Terna — 1 operation(s) for public api.

Terna Transparency API

The Transparency API from Terna — 1 operation(s) for transparency.

Scroll for all 7

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Terna Context

9 classes · 11 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Terna API Rules

11 rules · 10 errors 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetFeesV10MonthlySummaryResponse

2 properties

JSON SCHEMA

GetGenerationV20V20IdResponse

2 properties

JSON SCHEMA

GetIfeesV10MarketMarketidResponse

2 properties

JSON SCHEMA

GetMarketV10AsteFcrResponse

2 properties

JSON SCHEMA

GetMarketV10OutputOutputidResponse

2 properties

JSON SCHEMA

GetTransparencyV10V10IdResponse

2 properties

JSON SCHEMA

Security Posture 2

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

Terna Authentication

1 scheme

SECURITY

Terna Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: terna
name: Terna
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: low
  probe_state: unreadable
  source:
  - authentication
  - security
  generated: '2026-11-02'
  method: derived
image: https://www.terna.it/DesktopModules/AdactoBackend/API/download/get?image=12133
description: Terna S.p.A. is Italy’s leading electricity transmission system operator, responsible for managing the high‑voltage
  grid, ensuring reliable power supply, and driving the energy transition toward renewable sources. The company operates over
  75,000 km of transmission lines, connects with neighboring countries, and invests billions in digital innovation and sustainability
  initiatives.
url: https://raw.githubusercontent.com/api-evangelist/terna/refs/heads/main/apis.yml
x-type: company
x-source: harvest:energy
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-23 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-09-23'
modified: '2026-09-23'
tags:
- Energy
- Transmission
- Infrastructure
- Italy
- Renewables
tags_raw:
- Energy
- Transmission
- Infrastructure
- Italy
- Renewable
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/terna-rules.yml
- type: JSONLD
  url: json-ld/terna-context.jsonld
- type: Vocabulary
  url: vocabulary/terna-vocabulary.yml
- type: DataModel
  url: data-model/terna-data-model.yml
- type: Authentication
  url: authentication/terna-authentication.yml
- type: Conformance
  url: conformance/terna-conformance.yml
- type: Hosts
  url: hosts/terna-hosts.yml
- type: PrivacyPolicy
  url: https://developer.terna.it/privacy_and_cookie_policy
- type: DomainSecurity
  url: security/terna-domain-security.yml
- type: Website
  url: https://www.terna.it/
- type: Documentation
  url: https://www.terna.it/it/developer
- type: DeveloperPortal
  url: https://www.terna.it/it/developer
- type: GettingStarted
  url: https://www.terna.it/it/chi-siamo/terna-breve
- type: Support
  url: https://www.terna.it/it/contatti
apis:
- aid: terna:terna-fees-api
  name: Terna Fees API
  description: The Fees API from Terna — 1 operation(s) for fees.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Fees
  properties:
  - type: OpenAPI
    url: openapi/terna-fees-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-generation-api
  name: Terna Generation API
  description: The Generation API from Terna — 1 operation(s) for generation.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Generation
  properties:
  - type: OpenAPI
    url: openapi/terna-generation-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-ifees-api
  name: Terna Ifees API
  description: The Ifees API from Terna — 1 operation(s) for ifees.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Ifees
  properties:
  - type: OpenAPI
    url: openapi/terna-ifees-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-load-api
  name: Terna Load API
  description: The Load API from Terna — 1 operation(s) for load.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Load
  properties:
  - type: OpenAPI
    url: openapi/terna-load-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-market-api
  name: Terna Market API
  description: The Market API from Terna — 3 operation(s) for market.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Markets
  tags_raw:
  - Market
  properties:
  - type: OpenAPI
    url: openapi/terna-market-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-public-api-api
  name: Terna Public API
  description: The Public Api API from Terna — 1 operation(s) for public api.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Public APIs
  tags_raw:
  - Public Api
  properties:
  - type: OpenAPI
    url: openapi/terna-public-api-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
- aid: terna:terna-transparency-api
  name: Terna Transparency API
  description: The Transparency API from Terna — 1 operation(s) for transparency.
  humanURL: https://developer.terna.it/docs/read/Access_Token
  baseURL: https://api.terna.it
  tags:
  - Transparency
  properties:
  - type: OpenAPI
    url: openapi/terna-transparency-api-openapi.yml
  - type: JSONSchema
    url: json-schema/terna-get-fees-v10-monthly-summary-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-ifees-v10-market-marketid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-output-outputid-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-market-v10-aste-fcr-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-generation-v20-v20-id-response-schema.json
  - type: JSONSchema
    url: json-schema/terna-get-transparency-v10-v10-id-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation is served as HTML pages without machine‑readable OpenAPI or other contracts.
  evidence:
  - url: https://developer.terna.it/docs
    status: 200
  checked: 2026-09-23
x-enrichment:
  date: '2026-09-23'
  status: enriched
  artifacts_added: 18
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local

Terna API — frequently asked questions

Does Terna have an API?

Yes. APIs.io lists 7 APIs from Terna, including Terna Fees API, Terna Generation API and Terna Ifees API, and 4 more.

Is there an OpenAPI specification for the Terna API?

Yes. APIs.io indexes 7 OpenAPI specifications for Terna, each linked for download from this page.

How do I authenticate with the Terna API?

Terna uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Terna Authentication.

Is the Terna API ready for AI agents?

Terna has a Kin Score of 27.5 out of 100 (thin) and an Agent Readiness score of 22.2 (agent-aware), scored by API Evangelist on 2026-11-02.

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