RunKit + npm: ajv

const Ajv = require("ajv/dist/2020") const addFormats = require('ajv-formats') const ajv = new Ajv({ allErrors: true, validateFormats: false, strictSchema: false, strictTypes: false}) addFormats(ajv); const schema = { "$id": "https://spec.openapis.org/oas/3.1/schema/2021-05-20", "$schema": "https://json-schema.org/draft/2020-12/schema", "type": "object", "properties": { "openapi": { "type": "string", "pattern": "^3\\.1\\.\\d+(-.+)?quot; }, "info": { "$ref": "#/$defs/info" }, "jsonSchemaDialect": { "type": "string", "format": "uri", "default": "https://spec.openapis.org/oas/3.1/dialect/base" }, "servers": { "type": "array", "items": { "$ref": "#/$defs/server" } }, "paths": { "$ref": "#/$defs/paths" }, "webhooks": { "type": "object", "additionalProperties": { "$ref": "#/$defs/path-item-or-reference" } }, "components": { "$ref": "#/$defs/components" }, "security": { "type": "array", "items": { "$ref": "#/$defs/security-requirement" } }, "tags": { "type": "array", "items": { "$ref": "#/$defs/tag" } }, "externalDocs": { "$ref": "#/$defs/external-documentation" } }, "required": ["openapi", "info"], "anyOf": [ { "required": ["paths"] }, { "required": ["components"] }, { "required": ["webhooks"] } ], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false, "$defs": { "info": { "type": "object", "properties": { "title": { "type": "string" }, "summary": { "type": "string" }, "description": { "type": "string" }, "termsOfService": { "type": "string" }, "contact": { "$ref": "#/$defs/contact" }, "license": { "$ref": "#/$defs/license" }, "version": { "type": "string" } }, "required": ["title", "version"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "contact": { "type": "object", "properties": { "name": { "type": "string" }, "url": { "type": "string" }, "email": { "type": "string" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "license": { "type": "object", "properties": { "name": { "type": "string" }, "identifier": { "type": "string" }, "url": { "type": "string", "format": "uri" } }, "required": ["name"], "oneOf": [ { "required": ["identifier"] }, { "required": ["url"] } ], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "server": { "type": "object", "properties": { "url": { "type": "string", "format": "uri-reference" }, "description": { "type": "string" }, "variables": { "type": "object", "additionalProperties": { "$ref": "#/$defs/server-variable" } } }, "required": ["url"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "server-variable": { "type": "object", "properties": { "enum": { "type": "array", "items": { "type": "string" }, "minItems": 1 }, "default": { "type": "string" }, "descriptions": { "type": "string" } }, "required": ["default"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "components": { "type": "object", "properties": { "schemas": { "type": "object", "additionalProperties": { "$dynamicRef": "#meta" } }, "responses": { "type": "object", "additionalProperties": { "$ref": "#/$defs/response-or-reference" } }, "parameters": { "type": "object", "additionalProperties": { "$ref": "#/$defs/parameter-or-reference" } }, "examples": { "type": "object", "additionalProperties": { "$ref": "#/$defs/example-or-reference" } }, "requestBodies": { "type": "object", "additionalProperties": { "$ref": "#/$defs/request-body-or-reference" } }, "headers": { "type": "object", "additionalProperties": { "$ref": "#/$defs/header-or-reference" } }, "securitySchemes": { "type": "object", "additionalProperties": { "$ref": "#/$defs/security-scheme-or-reference" } }, "links": { "type": "object", "additionalProperties": { "$ref": "#/$defs/link-or-reference" } }, "callbacks": { "type": "object", "additionalProperties": { "$ref": "#/$defs/callbacks-or-reference" } }, "pathItems": { "type": "object", "additionalProperties": { "$ref": "#/$defs/path-item-or-reference" } } }, "patternProperties": { "^(schemas|responses|parameters|examples|requestBodies|headers|securitySchemes|links|callbacks|pathItems)quot;: { "$comment": "Enumerating all of the property names in the regex above is necessary for unevaluatedProperties to work as expected", "propertyNames": { "pattern": "^[a-zA-Z0-9._-]+quot; } } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "paths": { "type": "object", "patternProperties": { "^/": { "$ref": "#/$defs/path-item" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "path-item": { "type": "object", "properties": { "summary": { "type": "string" }, "description": { "type": "string" }, "servers": { "type": "array", "items": { "$ref": "#/$defs/server" } }, "parameters": { "type": "array", "items": { "$ref": "#/$defs/parameter-or-reference" } } }, "patternProperties": { "^(get|put|post|delete|options|head|patch|trace)quot;: { "$ref": "#/$defs/operation" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "path-item-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/path-item" } }, "operation": { "type": "object", "properties": { "tags": { "type": "array", "items": { "type": "string" } }, "summary": { "type": "string" }, "description": { "type": "string" }, "externalDocs": { "$ref": "#/$defs/external-documentation" }, "operationId": { "type": "string" }, "parameters": { "type": "array", "items": { "$ref": "#/$defs/parameter-or-reference" } }, "requestBody": { "$ref": "#/$defs/request-body-or-reference" }, "responses": { "$ref": "#/$defs/responses" }, "callbacks": { "type": "object", "additionalProperties": { "$ref": "#/$defs/callbacks-or-reference" } }, "deprecated": { "default": false, "type": "boolean" }, "security": { "type": "array", "items": { "$ref": "#/$defs/security-requirement" } }, "servers": { "type": "array", "items": { "$ref": "#/$defs/server" } } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "external-documentation": { "type": "object", "properties": { "description": { "type": "string" }, "url": { "type": "string", "format": "uri" } }, "required": ["url"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "parameter": { "type": "object", "properties": { "name": { "type": "string" }, "in": { "enum": ["query", "header", "path", "cookie"] }, "description": { "type": "string" }, "required": { "default": false, "type": "boolean" }, "deprecated": { "default": false, "type": "boolean" }, "allowEmptyValue": { "default": false, "type": "boolean" }, "schema": { "$dynamicRef": "#meta" }, "content": { "$ref": "#/$defs/content" } }, "required": ["in"], "oneOf": [ { "required": ["schema"] }, { "required": ["content"] } ], "dependentSchemas": { "schema": { "properties": { "style": { "type": "string" }, "explode": { "type": "boolean" }, "allowReserved": { "default": false, "type": "boolean" } }, "allOf": [ { "$ref": "#/$defs/examples" }, { "$ref": "#/$defs/parameter/dependentSchemas/schema/$defs/styles-for-path" }, { "$ref": "#/$defs/parameter/dependentSchemas/schema/$defs/styles-for-header" }, { "$ref": "#/$defs/parameter/dependentSchemas/schema/$defs/styles-for-query" }, { "$ref": "#/$defs/parameter/dependentSchemas/schema/$defs/styles-for-cookie" }, { "$ref": "#/$defs/parameter/dependentSchemas/schema/$defs/styles-for-form" } ], "$defs": { "styles-for-path": { "if": { "properties": { "in": { "const": "path" } }, "required": ["in"] }, "then": { "properties": { "style": { "default": "simple", "enum": ["matrix", "label", "simple"] }, "required": { "const": true } }, "required": ["required"] } }, "styles-for-header": { "if": { "properties": { "in": { "const": "header" } }, "required": ["in"] }, "then": { "properties": { "style": { "default": "simple", "enum": ["simple"] } } } }, "styles-for-query": { "if": { "properties": { "in": { "const": "query" } }, "required": ["in"] }, "then": { "properties": { "style": { "default": "form", "enum": [ "form", "spaceDelimited", "pipeDelimited", "deepObject" ] } } } }, "styles-for-cookie": { "if": { "properties": { "in": { "const": "cookie" } }, "required": ["in"] }, "then": { "properties": { "style": { "default": "form", "enum": ["form"] } } } }, "styles-for-form": { "if": { "properties": { "style": { "const": "form" } }, "required": ["style"] }, "then": { "properties": { "explode": { "default": true } } }, "else": { "properties": { "explode": { "default": false } } } } } } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "parameter-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/parameter" } }, "request-body": { "type": "object", "properties": { "description": { "type": "string" }, "content": { "$ref": "#/$defs/content" }, "required": { "default": false, "type": "boolean" } }, "required": ["content"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "request-body-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/request-body" } }, "content": { "type": "object", "additionalProperties": { "$ref": "#/$defs/media-type" }, "propertyNames": { "format": "media-range" } }, "media-type": { "type": "object", "properties": { "schema": { "$dynamicRef": "#meta" }, "encoding": { "type": "object", "additionalProperties": { "$ref": "#/$defs/encoding" } } }, "allOf": [ { "$ref": "#/$defs/specification-extensions" }, { "$ref": "#/$defs/examples" } ], "unevaluatedProperties": false }, "encoding": { "type": "object", "properties": { "contentType": { "type": "string", "format": "media-range" }, "headers": { "type": "object", "additionalProperties": { "$ref": "#/$defs/header-or-reference" } }, "style": { "default": "form", "enum": ["form", "spaceDelimited", "pipeDelimited", "deepObject"] }, "explode": { "type": "boolean" }, "allowReserved": { "default": false, "type": "boolean" } }, "allOf": [ { "$ref": "#/$defs/specification-extensions" }, { "$ref": "#/$defs/encoding/$defs/explode-default" } ], "unevaluatedProperties": false, "$defs": { "explode-default": { "if": { "properties": { "style": { "const": "form" } }, "required": ["style"] }, "then": { "properties": { "explode": { "default": true } } }, "else": { "properties": { "explode": { "default": false } } } } } }, "responses": { "type": "object", "properties": { "default": { "$ref": "#/$defs/response-or-reference" } }, "patternProperties": { "^[1-5][0-9X]{2}quot;: { "$ref": "#/$defs/response-or-reference" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "response": { "type": "object", "properties": { "description": { "type": "string" }, "headers": { "type": "object", "additionalProperties": { "$ref": "#/$defs/header-or-reference" } }, "content": { "$ref": "#/$defs/content" }, "links": { "type": "object", "additionalProperties": { "$ref": "#/$defs/link-or-reference" } } }, "required": ["description"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "response-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/response" } }, "callbacks": { "type": "object", "$ref": "#/$defs/specification-extensions", "additionalProperties": { "$ref": "#/$defs/path-item-or-reference" } }, "callbacks-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/callbacks" } }, "example": { "type": "object", "properties": { "summary": { "type": "string" }, "description": { "type": "string" }, "value": true, "externalValue": { "type": "string", "format": "uri" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "example-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/example" } }, "link": { "type": "object", "properties": { "operationRef": { "type": "string", "format": "uri-reference" }, "operationId": true, "parameters": { "$ref": "#/$defs/map-of-strings" }, "requestBody": true, "description": { "type": "string" }, "body": { "$ref": "#/$defs/server" } }, "oneOf": [ { "required": ["operationRef"] }, { "required": ["operationId"] } ], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "link-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/link" } }, "header": { "type": "object", "properties": { "description": { "type": "string" }, "required": { "default": false, "type": "boolean" }, "deprecated": { "default": false, "type": "boolean" }, "allowEmptyValue": { "default": false, "type": "boolean" } }, "dependentSchemas": { "schema": { "properties": { "style": { "default": "simple", "enum": ["simple"] }, "explode": { "default": false, "type": "boolean" }, "allowReserved": { "default": false, "type": "boolean" }, "schema": { "$dynamicRef": "#meta" } }, "$ref": "#/$defs/examples" }, "content": { "properties": { "content": { "$ref": "#/$defs/content" } } } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "header-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/header" } }, "tag": { "type": "object", "properties": { "name": { "type": "string" }, "description": { "type": "string" }, "externalDocs": { "$ref": "#/$defs/external-documentation" } }, "required": ["name"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "reference": { "type": "object", "properties": { "$ref": { "type": "string", "format": "uri-reference" }, "summary": { "type": "string" }, "description": { "type": "string" } }, "unevaluatedProperties": false }, "schema": { "$dynamicAnchor": "meta", "type": ["object", "boolean"] }, "security-scheme": { "type": "object", "properties": { "type": { "enum": ["apiKey", "http", "mutualTLS", "oauth2", "openIdConnect"] }, "description": { "type": "string" } }, "required": ["type"], "allOf": [ { "$ref": "#/$defs/specification-extensions" }, { "$ref": "#/$defs/security-scheme/$defs/type-apikey" }, { "$ref": "#/$defs/security-scheme/$defs/type-http" }, { "$ref": "#/$defs/security-scheme/$defs/type-http-bearer" }, { "$ref": "#/$defs/security-scheme/$defs/type-oauth2" }, { "$ref": "#/$defs/security-scheme/$defs/type-oidc" } ], "unevaluatedProperties": false, "$defs": { "type-apikey": { "if": { "properties": { "type": { "const": "apiKey" } }, "required": ["type"] }, "then": { "properties": { "name": { "type": "string" }, "in": { "enum": ["query", "header", "cookie"] } }, "required": ["name", "in"] } }, "type-http": { "if": { "properties": { "type": { "const": "http" } }, "required": ["type"] }, "then": { "properties": { "scheme": { "type": "string" } }, "required": ["scheme"] } }, "type-http-bearer": { "if": { "properties": { "type": { "const": "http" }, "scheme": { "const": "bearer" } }, "required": ["type", "scheme"] }, "then": { "properties": { "bearerFormat": { "type": "string" } }, "required": ["scheme"] } }, "type-oauth2": { "if": { "properties": { "type": { "const": "oauth2" } }, "required": ["type"] }, "then": { "properties": { "flows": { "$ref": "#/$defs/oauth-flows" } }, "required": ["flows"] } }, "type-oidc": { "if": { "properties": { "type": { "const": "openIdConnect" } }, "required": ["type"] }, "then": { "properties": { "openIdConnectUrl": { "type": "string", "format": "uri" } }, "required": ["openIdConnectUrl"] } } } }, "security-scheme-or-reference": { "if": { "required": ["$ref"] }, "then": { "$ref": "#/$defs/reference" }, "else": { "$ref": "#/$defs/security-scheme" } }, "oauth-flows": { "type": "object", "properties": { "implicit": { "$ref": "#/$defs/oauth-flows/$defs/implicit" }, "password": { "$ref": "#/$defs/oauth-flows/$defs/password" }, "clientCredentials": { "$ref": "#/$defs/oauth-flows/$defs/client-credentials" }, "authorizationCode": { "$ref": "#/$defs/oauth-flows/$defs/authorization-code" } }, "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false, "$defs": { "implicit": { "type": "object", "properties": { "authorizationUrl": { "type": "string" }, "refreshUrl": { "type": "string" }, "scopes": { "$ref": "#/$defs/map-of-strings" } }, "required": ["authorizationUrl", "scopes"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "password": { "type": "object", "properties": { "tokenUrl": { "type": "string" }, "refreshUrl": { "type": "string" }, "scopes": { "$ref": "#/$defs/map-of-strings" } }, "required": ["tokenUrl", "scopes"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "client-credentials": { "type": "object", "properties": { "tokenUrl": { "type": "string" }, "refreshUrl": { "type": "string" }, "scopes": { "$ref": "#/$defs/map-of-strings" } }, "required": ["tokenUrl", "scopes"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false }, "authorization-code": { "type": "object", "properties": { "authorizationUrl": { "type": "string" }, "tokenUrl": { "type": "string" }, "refreshUrl": { "type": "string" }, "scopes": { "$ref": "#/$defs/map-of-strings" } }, "required": ["authorizationUrl", "tokenUrl", "scopes"], "$ref": "#/$defs/specification-extensions", "unevaluatedProperties": false } } }, "security-requirement": { "type": "object", "additionalProperties": { "type": "array", "items": { "type": "string" } } }, "specification-extensions": { "patternProperties": { "^x-": true } }, "examples": { "properties": { "example": true, "examples": { "type": "object", "additionalProperties": { "$ref": "#/$defs/example-or-reference" } } } }, "map-of-strings": { "type": "object", "additionalProperties": { "type": "string" } } } } const validate = ajv.compile(schema) test({ "openapi": "3.1.0", "info": { "title": "Webhook Example", "version": "1.0.0" }, "webhooks": { "newPet": { "post": { "requestBody": { "description": "Information about a new pet in the system", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Pet" } } } }, "responses": { "200": { "description": "Return a 200 status to indicate that the data was received successfully" } } } } }, "components": { "schemas": { "Pet": { "required": [ "id", "name" ], "properties": { "id": { "type": "integer", "format": "int64" }, "name": { "type": "string" }, "tag": { "type": "string" } } } } } } ) function test(data) { const valid = validate(data) if (valid) console.log("Valid!") else console.log("Invalid: " + ajv.errorsText(validate.errors)) }