Schema Validation

aid: schema-validation
name: Schema Validation
description: Schema validation is the practice of verifying that data structures conform to a defined schema, contract, or
  specification. In API development, schema validation ensures API requests and responses match declared OpenAPI, JSON Schema,
  AsyncAPI, or GraphQL specifications, enabling contract testing, governance, and runtime integrity. Key tools include AJV,
  Hyperjump JSON Schema, Spectral, and Schemathesis, each addressing different validation contexts from CLI pipelines to runtime
  API testing.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- API Governance
- Contract Testing
- JSON Schema
- OpenAPI
- Schema Validation
url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/apis.yml
created: '2025'
modified: '2026-05-02'
specificationVersion: '0.19'
apis:
- aid: schema-validation:ajv
  name: AJV JSON Schema Validator
  description: AJV (Another JSON Validator) is the fastest JSON Schema validator for JavaScript and Node.js. It supports JSON
    Schema drafts 04/06/07/2019-09/ 2020-12 and JSON Type Definition (RFC 8927). AJV compiles schemas to highly optimized
    JavaScript functions for maximum runtime performance.
  humanURL: https://ajv.js.org/
  tags:
  - JSON Schema
  - JavaScript
  - Schema Validation
  - Node.js
  properties:
  - type: Documentation
    url: https://ajv.js.org/
  - type: GitHubRepository
    url: https://github.com/ajv-validator/ajv
  - type: npm Package
    url: https://www.npmjs.com/package/ajv
  - type: APIReference
    url: https://ajv.js.org/api.html
  - url: graphql/schema-validation-graphql.md
    type: GraphQL
- aid: schema-validation:hyperjump-json-schema
  name: Hyperjump JSON Schema
  description: Hyperjump is a JSON Schema validation, annotation, and bundling library for JavaScript. It supports JSON Schema
    drafts 04, 06, 07, 2019-09, 2020-12, OpenAPI 3.0, and OpenAPI 3.1 vocabularies. It also provides an OAS Schema Validator
    for OpenAPI-specific validation.
  humanURL: https://json-schema.hyperjump.io/
  tags:
  - JSON Schema
  - JavaScript
  - OpenAPI
  - Schema Validation
  properties:
  - type: Documentation
    url: https://json-schema.hyperjump.io/
  - type: GitHubRepository
    url: https://github.com/hyperjump-io/json-schema
  - type: npm Package
    url: https://www.npmjs.com/package/@hyperjump/json-schema
- aid: schema-validation:spectral
  name: Spectral
  description: Spectral is an open-source JSON/YAML linter and schema validator from Stoplight. It provides customizable rulesets
    for validating OpenAPI, AsyncAPI, JSON Schema, and any custom schema format, enabling API governance at the CLI, IDE,
    and CI/CD pipeline level.
  humanURL: https://stoplight.io/open-source/spectral
  tags:
  - API Governance
  - API Linting
  - JSON Schema
  - OpenAPI
  - Schema Validation
  properties:
  - type: Documentation
    url: https://docs.stoplight.io/docs/spectral/
  - type: GitHubRepository
    url: https://github.com/stoplightio/spectral
  - type: npm Package
    url: https://www.npmjs.com/package/@stoplight/spectral-core
- aid: schema-validation:openapi-schema-validator
  name: OpenAPI Schema Validator
  description: A Node.js library for validating OpenAPI schemas against the OpenAPI specification for versions 2.0 (Swagger),
    3.0.x, and 3.1.x. Available as both a library and CLI tool.
  humanURL: https://github.com/seriousme/openapi-schema-validator
  tags:
  - OpenAPI
  - Schema Validation
  - Node.js
  properties:
  - type: GitHubRepository
    url: https://github.com/seriousme/openapi-schema-validator
  - type: npm Package
    url: https://www.npmjs.com/package/@seriousme/openapi-schema-validator
- aid: schema-validation:blaze-validator
  name: Blaze JSON Schema Validator
  description: An ultra high-performance JSON Schema validator for C++ with support for JSON Schema Draft 4, Draft 6, Draft
    7, 2019-09, and 2020-12. Suitable for high-throughput server-side validation scenarios.
  humanURL: https://github.com/sourcemeta/blaze
  tags:
  - C++
  - JSON Schema
  - Performance
  - Schema Validation
  properties:
  - type: GitHubRepository
    url: https://github.com/sourcemeta/blaze
- aid: schema-validation:alterschema
  name: AlterSchema
  description: A tooling library for upgrading JSON Schema documents from previous versions (Draft 4, 6, 7, 2019-09) to the
    latest draft 2020-12, enabling schema modernization pipelines.
  humanURL: https://github.com/sourcemeta/alterschema
  tags:
  - JSON Schema
  - Schema Migration
  - Schema Validation
  properties:
  - type: GitHubRepository
    url: https://github.com/sourcemeta/alterschema
common:
- type: DomainSecurity
  url: security/schema-validation-domain-security.yml
- type: Website
  url: https://json-schema.org/
- type: Documentation
  url: https://json-schema.org/learn
- type: Blog
  url: https://apievangelist.com/archive/
- type: GitHubOrganization
  url: https://github.com/json-schema-org
- type: JSONSchema
  url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/json-schema/schema-validation-config-schema.json
- type: JSONStructure
  url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/json-structure/schema-validation-config-structure.json
- type: JSONLD
  url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/json-ld/schema-validation-context.jsonld
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/vocabulary/schema-validation-vocabulary.yml
- type: Examples
  url: https://raw.githubusercontent.com/api-evangelist/schema-validation/refs/heads/main/examples/schema-validation-ajv-example.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com