data-json-schema-validate Edge Function — Data

data-json-schema-validate — JSON Schema Draft 7 validator

Validates any value against a JSON Schema Draft 7 schema with zero external dependencies.

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API

POST /api/data-json-schema-validate

Request body

Field	Type	Required	Description
schema	object	✅	JSON Schema Draft 7 object
data	any	✅	Value to validate

Supported keywords: type, required, properties, minimum, maximum, minLength, maxLength, pattern, enum, items, additionalProperties

Success response (200)

{
  "success": true,
  "data": {
    "valid": false,
    "errors": [
      { "path": "age", "message": "Value 200 is greater than maximum 150" }
    ]
  }
}

Error responses

Code	HTTP	When
INVALID_INPUT	400	Missing schema or data field
INTERNAL_ERROR	500	Unexpected error

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Usage

cURL

curl -X POST "$FUNCTION_URL" \
  -H "Content-Type: application/json" \
  -d '{
    "schema": {"type":"object","required":["name"],"properties":{"name":{"type":"string"}}},
    "data": {"name": "Alice"}
  }'

TypeScript / JavaScript (HTTP)

const response = await fetch(FUNCTION_URL, {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ schema: mySchema, data: userInput }),
});
const { data } = await response.json();
if (!data.valid) console.error(data.errors);

Direct import (Node / Bun / Deno)

import { jsonSchemaValidate } from '@aerostack/functions/data-json-schema-validate';

const result = jsonSchemaValidate({ schema: mySchema, data: userInput });
if (!result.valid) throw new Error(result.errors[0]?.message);

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Use Cases

• Validating API request bodies against a predefined schema before processing
• Checking user-submitted form data or config objects for correctness
• Validating webhook payloads from third-party services before ingesting into a database

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Notes

• Implements JSON Schema Draft 7 subset: type, required, properties, minimum, maximum, minLength, maxLength, pattern, enum, items, additionalProperties
• Zero external dependencies — safe to use in Cloudflare Workers
• Errors include a path field using dot and bracket notation (e.g. user.address[0].zip)