Helidon

Helidon is a collection of Java libraries from Oracle for writing microservices that run on a fast web core powered by Netty, supporting MicroProfile and reactive programming models.

Helidon publishes 4 APIs on the APIs.io network, including Health API, Info API, Metrics API, and 1 more. Tagged areas include Cloud-Native, Frameworks, Java, MicroProfile, and Microservices.

The Helidon catalog on APIs.io includes 1 Spectral governance ruleset.

Helidon’s developer surface includes documentation, getting-started guide, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

24.9/100 emerging ▬ flat Agent 29/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessFreemium

4 APIs 1 MCP Servers

Cloud-Native Frameworks JavaMicroProfileMicroservices Oracle Reactive

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 24.9/100 · emerging

Contract Quality 12.1 / 25

Developer Ergonomics 4.8 / 20

Access Clarity 0.0 / 20

Operational Transparency 1.4 / 13

Contract Governance 1.2 / 12

Discoverability 5.6 / 10

Agent readiness — 29/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 4 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/helidon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Rate Limits 1

Documented rate limits and quota policies.

Helidon Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 1

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

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

MCPServer

MCPServer

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 3

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

Source (apis.yml)

aid: helidon
name: Helidon
description: Helidon is a collection of Java libraries from Oracle for writing microservices that run on a fast web core powered
  by Netty, supporting MicroProfile and reactive programming models.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/helidon.png
tags:
- Cloud-Native
- Frameworks
- Java
- MicroProfile
- Microservices
- Oracle
- Reactive
tags_raw:
- Cloud Native
- Frameworks
- Java
- MicroProfile
- Microservices
- Oracle
- Reactive
url: https://raw.githubusercontent.com/api-evangelist/helidon/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: helidon:helidon-health-api
  name: Helidon Health API
  description: The Health API from Helidon — 4 operation(s) for health.
  humanURL: https://helidon.io/
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/helidon-health-api-openapi.yml
  - type: Documentation
    url: https://helidon.io/docs/latest
  - type: GettingStarted
    url: https://helidon.io/docs/latest/#/about/prerequisites
  - type: JSONSchema
    url: json-schema/helidon-application-config.json
- aid: helidon:helidon-info-api
  name: Helidon Info API
  description: The Info API from Helidon — 1 operation(s) for info.
  humanURL: https://helidon.io/
  tags:
  - Info
  properties:
  - type: OpenAPI
    url: openapi/helidon-info-api-openapi.yml
  - type: Documentation
    url: https://helidon.io/docs/latest
  - type: GettingStarted
    url: https://helidon.io/docs/latest/#/about/prerequisites
  - type: JSONSchema
    url: json-schema/helidon-application-config.json
- aid: helidon:helidon-metrics-api
  name: Helidon Metrics API
  description: The Metrics API from Helidon — 4 operation(s) for metrics.
  humanURL: https://helidon.io/
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/helidon-metrics-api-openapi.yml
  - type: Documentation
    url: https://helidon.io/docs/latest
  - type: GettingStarted
    url: https://helidon.io/docs/latest/#/about/prerequisites
  - type: JSONSchema
    url: json-schema/helidon-application-config.json
- aid: helidon:helidon-openapi-api
  name: Helidon OpenAPI API
  description: The OpenAPI API from Helidon — 1 operation(s) for openapi.
  humanURL: https://helidon.io/
  tags:
  - OpenAPI
  properties:
  - type: OpenAPI
    url: openapi/helidon-openapi-api-openapi.yml
  - type: Documentation
    url: https://helidon.io/docs/latest
  - type: GettingStarted
    url: https://helidon.io/docs/latest/#/about/prerequisites
  - type: JSONSchema
    url: json-schema/helidon-application-config.json
common:
- type: AgenticAccess
  url: agentic-access/helidon-agentic-access.yml
- type: DomainSecurity
  url: security/helidon-domain-security.yml
- type: Website
  url: https://helidon.io/
- type: Documentation
  url: https://helidon.io/docs/latest
- type: GettingStarted
  url: https://helidon.io/docs/latest/#/about/prerequisites
- type: GitHubOrganization
  url: https://github.com/helidon-io
- type: Blog
  url: https://medium.com/helidon
- url: https://medium.com/feed/helidon
  type: BlogRSS
  description: Discovered RSS/Atom feed for https://medium.com/helidon
- name: MCP Server
  url: https://github.com/helidon-io/helidon-mcp
  type: MCPServer
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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