Use schema-validator with your AI.
Connect your account once and let the AI you already use work with it, without building another integration. Transform your AI into a strict data gatekeeper. Validate JSON payloads instantly with a lightweight, native Javascript engine without Zod or Ajv bloat.
Developed, maintained, and hosted by Vinkius.
MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED
Waiting for input…
Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.
Complete set · 1 capability
The complete schema-validator capability set.
These are the exact actions your AI can choose when you ask it to work with schema-validator.
01
1 capability in this set.
Part of 1 available through schema-validator.
- 01
Validate JSON schema
You must provide both the data and the schema as stringified JSON objects. Validates a JSON data object against a customized schema definition to ensure structural integrity and strict type safety
Observed, not estimated
874ms average. Fast in production.
schema-validator is checked daily against the live service.
- Fastest day
- 646ms
- Slowest day
- 1155ms
- 14-day trend
- Slowing+23%
Connect your client
One URL. Every client.
Activate the Connector, copy your link, and paste it into the client you already use. 1 capability arrives ready to run.
Preview access · not provider authentication
The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of schema-validator, so you can see the experience inside your AI.
It does not authenticate your account with schema-validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.
schema-validator Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_ktFyEC53FboFhcW2VPemJITVquvFY4zFFmc76f6c/mcpClaude Desktop
Follow the steps below to connect in seconds.
- 1In Claude Desktop, open Settings → Connectors.
- 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
- 3Click Add and start a new chat — schema-validator capabilities are ready to use.
{
"mcpServers": {
"deterministic-json-schema-gatekeeper-mcp": {
"url": "https://edge.vinkius.com/vk_preview_ktFyEC53FboFhcW2VPemJITVquvFY4zFFmc76f6c/mcp"
}
}
}
Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline
Step-by-step instructions for each client are in the guide. How to connect
FAQ
Questions schema-validator owners ask.
- 01
Why use this instead of Zod or Ajv?
Zod is fantastic for codebases but creates massive dependency bloat when distributed in edge-runtime micro-agents. This MCP implements a deterministic schema checker using pure V8 logic, delivering identical structural protection with 0ms spin-up time and zero external dependencies.
- 02
What validation rules does it support out of the box?
It supports data types (string, number, array, boolean, object), required flag, string boundaries (minLength, maxLength, pattern), number boundaries (min, max), and even array item typing (e.g., ensuring an array contains only strings).
- 03
Will it crash if the JSON is completely broken?
No. The engine employs aggressive try-catch boundary catching. If a payload is unparseable or maliciously formatted, it gracefully intercepts the panic and returns a structured JSON error diagnostic without taking the server down.
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