JSON Schema Tools

Name: JSON Schema Tools
Author: basitalisandhu

by basitalisandhuversion 0.3.0i★ –iRuns on your computer

Registry nameio.github.basitalisandhu/mcp-json-schema-tools

Install

Overview

Description from the maker (original English)

Validate JSON against a schema with Ajv, infer a schema from samples and diff two schemas.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

DockerDocker installed

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "json-schema-tools": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0"
      ]
    }
  }
}

Run this in your terminal

claude mcp add json-schema-tools -- docker run -i --rm ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "json-schema-tools": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "json-schema-tools": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account basitalisandhu, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 0% of the other 5571 servers in this category
Published to the registry more recently than 67% of the other 5571 servers in this category
Basic checks equal to or better than 100% of the other 5571 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is JSON Schema Tools safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.3.0) reached the registry 12 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Docker on your computer.

What can I use instead?

In the same category: GitHub, Desktop Commander, Cloudflare MCP

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

json-schema-tools MCP server

Validates JSON against JSON Schema drafts 07, 2019-09 and 2020-12 with Ajv, infers a schema from sample documents, and diffs two schemas with a compatibility verdict per change.

Part of dev-mcp-servers. Stdio transport only; the server never opens a port.

Tools

Tool	Input	What it returns
`validate_json`	`schema`, `data`, `draft?`	`valid`, draft used, error count and up to 200 errors with JSON Pointer path, schema path, keyword, message and params. Formats (email, uri, date-time, uuid and more) are checked.
`infer_schema`	`samples` (array of documents or a JSON string), `enum_threshold?`, `detect_formats?`, `title?`	A draft 2020-12 schema: types unioned across samples, `required` for keys present in every sample, nested objects, array items, string formats, optional enums.
`diff_schemas`	`before`, `after`	Every change with path, before and after values and an impact: breaking, compatible or review, from the point of view of documents valid under `before`.

Install

Claude Code:

claude mcp add json-schema-tools -- docker run --rm -i ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0

Add -s user to make it available in every project. Any client that reads .mcp.json (Claude Code, Claude Desktop, Cursor):

"mcpServers": { "json-schema-tools": { "command": "docker", "args": ["run", "--rm", "-i", "ghcr.io/basitalisandhu/mcp-json-schema-tools:0.3.0"] } } }

Pin the version as shown so that an update cannot change what runs in your editor without you noticing. The package is not on npmjs.com yet, so npx does not work; see the repository README for GitHub Packages npm. From a checkout, use "command": "node", "args": [" /packages/json-schema-tools/dist/index.js"] after npm install && npm run build at the repository root.

What it touches

Network: None. Remote $ref targets are not fetched.
Local files: None.
Telemetry: none.

Notes

Ajv runs with strict: false so real-world schemas with unknown keywords still validate.
Draft-04 and draft-06 schemas are rejected; update $schema or remove it.
Schemas and documents can be passed as JSON values or as JSON strings; both are capped at 2 MB.

Build and test

npm install        # at the repository root

npm run build -w @basitalisandhu/mcp-json-schema-tools npm test -w @basitalisandhu/mcp-json-schema-tools

Tests use node:test and the SDK's in-memory transport; they do not reach the network.

Licence

MIT. See LICENSE.

JSON Schema Tools

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

GitHub

Desktop Commander

Cloudflare MCP

README from the maker

json-schema-tools MCP server

Tools

Install

What it touches

Notes

Build and test

Licence