JSON Schema Regression Examples — Free Pilot

Free pilot: generate bounded old-accepted, new-rejected JSON Schema examples. An inconclusive result never proves compatibility. Schemas and results are processed in memory; only anonymous coarse usage outcomes are retained. Supply schemas as JSON strings to preserve large integers. Read value_json for exact examples. No API key, model call or payment is needed. Keep the returned anonymous session_token and attempt_id for optional, explicit receipt acknowledgment and nonbinding future-price interest. Never acknowledge receipt or price interest automatically. Supported subset: one explicit type, properties, required, boolean additionalProperties, items, enum, minimum/maximum, minLength/maxLength and minItems/maxItems. No references, composition, patterns, formats or full OpenAPI. Both the HTTP JSON envelope and the combined UTF-8 schema text are limited to 64 KiB; escaping may make the envelope limit stricter. The complete response is limited to 1 MiB. Returns exact example strings and generated file contents for local verification.

{
  "type": "object",
  "properties": {
    "old_schema_json": {
      "type": "string",
      "maxLength": 65536,
      "description": "Old schema encoded as a JSON string."
    },
    "new_schema_json": {
      "type": "string",
      "maxLength": 65536,
      "description": "New schema encoded as a JSON string."
    },
    "session_token": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$",
      "description": "Anonymous session token returned by this MCP tool; not an operator credential."
    }
  },
  "required": [
    "old_schema_json",
    "new_schema_json"
  ],
  "additionalProperties": false
}

Explicitly acknowledge receiving one generated package in this anonymous session. Call only after the user or client confirms receipt; never call automatically. This is a client-reported acknowledgment, not evidence of file verification, purchase, payment or human identity.

{
  "type": "object",
  "properties": {
    "session_token": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$",
      "description": "Anonymous session token returned by this MCP tool; not an operator credential."
    },
    "attempt_id": {
      "type": "string",
      "pattern": "^[0-9a-f]{32}$",
      "description": "Attempt id returned with the generated package."
    }
  },
  "required": [
    "session_token",
    "attempt_id"
  ],
  "additionalProperties": false
}

Record explicit, voluntary, nonbinding interest in a future package priced at 29 USD. Call only when the user or client has expressly indicated this interest; never infer interest from generating or receiving a package. Requires the same custom supported schema attempt to have produced a verified counterexample and received an explicit receipt acknowledgment. This is not an order, checkout, subscription, purchase or payment; no money moves and no external contact is made. The current pilot remains free.

{
  "type": "object",
  "properties": {
    "session_token": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$",
      "description": "Anonymous session token returned by this MCP tool; not an operator credential."
    },
    "attempt_id": {
      "type": "string",
      "pattern": "^[0-9a-f]{32}$",
      "description": "Attempt id returned with the generated package."
    },
    "price_usd": {
      "type": "integer",
      "const": 29
    },
    "voluntary": {
      "type": "boolean",
      "const": true
    }
  },
  "required": [
    "session_token",
    "attempt_id",
    "price_usd",
    "voluntary"
  ],
  "additionalProperties": false
}