JSON Schema validation API

Validate a JSON value against a JSON Schema (Ajv, draft-07/2020-12) and get detailed errors (path, message, keyword). For agents producing or checking structured output. Pure compute. Answers 'validate this JSON against this schema', 'does this data match the schema', 'is this JSON valid per schema'.

Price$0.01per request

MethodPOST

Route/v1/util/json-validate

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

utiljson-schemavalidationajvschemastructured-outputvalidatejson

API URLhttps://x402.hexl.dev/v1/util/json-validate

Integration docs

Example request

{
  "schema": {
    "type": "object",
    "required": [
      "age"
    ],
    "properties": {
      "age": {
        "type": "number"
      }
    }
  },
  "data": {
    "age": "old"
  }
}

Example response

{
  "valid": false,
  "errorCount": 1,
  "errors": [
    {
      "path": "/age",
      "message": "must be number",
      "keyword": "type",
      "params": {
        "type": "number"
      }
    }
  ]
}

Input schema

{
  "type": "object",
  "required": [
    "schema",
    "data"
  ],
  "properties": {
    "schema": {
      "type": "object",
      "additionalProperties": true
    },
    "data": {}
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}