JSR-303 website screenshot

JSR-303

JSR-303 (Bean Validation) is a Java specification that defines a metadata model and API for JavaBean validation. It provides a standard way to define validation constraints on Java objects using annotations, enabling developers to enforce business rules and data integrity at the object level. Now standardized as Jakarta Validation, with version 3.1 released for Jakarta EE 11 and version 4.0 under development for Jakarta EE 12.

JSR-303 publishes 1 API on the APIs.io network. Tagged areas include Annotations, Bean Validation, Java, JSR-303, and Jakarta EE.

JSR-303’s developer surface includes documentation, engineering blog, and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub
20.1/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
AnnotationsBean ValidationJavaJSR-303Jakarta EEValidation

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 20.1/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 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 0 / 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/jsr-303: 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 1

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

Jakarta Validation

The Jakarta Validation specification (originally JSR-303, then JSR-349, JSR-380) for defining and enforcing validation constraints on Java objects. Provides object level constra...

Pricing Plans 1

Published pricing tiers and plan structures.

Jsr 303 Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Jsr 303 Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Jsr 303 Finops

FINOPS

Security Posture 1

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

Jsr 303 Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 Specification
Specification

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: jsr-303
name: JSR-303
description: JSR-303 (Bean Validation) is a Java specification that defines a metadata model and API for JavaBean validation.
  It provides a standard way to define validation constraints on Java objects using annotations, enabling developers to enforce
  business rules and data integrity at the object level. Now standardized as Jakarta Validation, with version 3.1 released
  for Jakarta EE 11 and version 4.0 under development for Jakarta EE 12.
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/jsr-303.png
tags:
- Annotations
- Bean Validation
- Java
- JSR-303
- Jakarta EE
- Validation
url: https://raw.githubusercontent.com/api-evangelist/jsr-303/refs/heads/main/apis.yml
created: '2025-01-01'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: jsr-303:bean-validation
  name: Jakarta Validation
  description: The Jakarta Validation specification (originally JSR-303, then JSR-349, JSR-380) for defining and enforcing
    validation constraints on Java objects. Provides object level constraint declaration and validation facilities, plus a
    constraint metadata repository and query API. Current version 3.1 aligns with Jakarta EE 11.
  humanURL: https://jakarta.ee/specifications/bean-validation/
  tags:
  - Annotations
  - Bean Validation
  - Java
  - Jakarta EE
  properties:
  - type: Documentation
    url: https://jakarta.ee/specifications/bean-validation/
  - type: Specification
    url: https://jakarta.ee/specifications/bean-validation/3.1/
  - type: Reference
    url: https://beanvalidation.org/
common:
- type: DomainSecurity
  url: security/jsr-303-domain-security.yml
- type: Website
  url: https://jakarta.ee/specifications/bean-validation/
- type: Documentation
  url: https://jakarta.ee/specifications/bean-validation/
- type: Specification
  url: https://jakarta.ee/specifications/bean-validation/3.1/
- url: https://jakarta.ee/blogs/index.xml
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com