JSONShelf MCP server

JSONShelf is an MCP server with 4 tools an agent can call, among them jsonshelf_coerce, jsonshelf_example, jsonshelf_repair. It answers at https://jsonshelf.vercel.app/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 24 October 2026, succeeded.

Status

Answering

Tools

Reliability

6 of 6 checks

Response time

1570 ms

Transport

streamable HTTP

Last checked

24 October 2026

Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms.

Description as the publisher wrote it.

The 4 tools JSONShelf offers

Tool	What it does
`jsonshelf_coerce`	Soft-cast values to match a schema (string "42" → 42 for integer fields, etc.). Inputs: input, schema
`jsonshelf_example`	Generate a minimal valid example matching a JSON schema. Inputs: schema
`jsonshelf_repair`	Repair malformed JSON. Returns valid JSON plus a diff of what was fixed. Inputs: input, schema, mode
`jsonshelf_validate`	Validate JSON against a schema. Returns structured errors with JSON Pointer paths and remedies. Inputs: input, schema

Add JSONShelf to your AI client

Every block below points at https://jsonshelf.vercel.app/mcp. Pick your client and copy.

Claude Code: one command in your terminal

claude mcp add --transport http jsonshelf https://jsonshelf.vercel.app/mcp

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "jsonshelf": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://jsonshelf.vercel.app/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

{
  "mcpServers": {
    "jsonshelf": {
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "jsonshelf": {
      "type": "http",
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Zed: Zed settings.json

{
  "context_servers": {
    "jsonshelf": {
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Windsurf: ~/.codeium/mcp_config.json

{
  "mcpServers": {
    "jsonshelf": {
      "serverUrl": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

{
  "mcpServers": {
    "jsonshelf": {
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Continue: .continue/mcpServers/neuronto.yaml

name: JSONShelf
version: 0.0.1
schema: v1
mcpServers:
  - name: JSONShelf
    type: streamable-http
    url: https://jsonshelf.vercel.app/mcp

Gemini CLI: ~/.gemini/settings.json

{
  "mcpServers": {
    "jsonshelf": {
      "httpUrl": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Codex CLI: MCP server config

{
  "mcpServers": {
    "jsonshelf": {
      "type": "http",
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Warp: MCP servers, + Add, paste JSON

{
  "mcpServers": {
    "jsonshelf": {
      "url": "https://jsonshelf.vercel.app/mcp"
    }
  }
}

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Fjsonshelf.vercel.app%2Fmcp&type=streamable_http&id=jsonshelf&name=JSONShelf

Is JSONShelf up right now?

It answered our last check on 24 October 2026 in 1570 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about JSONShelf

How many tools does JSONShelf have?

4, as returned by the server's own tools/list on 22 September 2026: jsonshelf_coerce, jsonshelf_example, jsonshelf_repair, jsonshelf_validate.

Is JSONShelf down?

It answered our last check on 24 October 2026 in 1570 ms. Over 6 checks since 11 September 2026 it answered 6.

How do I add JSONShelf to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://jsonshelf.vercel.app/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does JSONShelf need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: io.github.walkojas-boop. Endpoint host: jsonshelf.vercel.app. ARD identifier: urn:air:io.github.walkojas-boop:mcp:jsonshelf. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.