Community · Official remote MCP server

The JSON validity MCP server,
connected in one click.

JSON validity. Connect the official JSON validity MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect JSON validity free How it works

Free to start · No credit card · No hosting needed

Use this server

Add JSON validity to your AI in one minute

Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.

claude mcp add --transport http json-validity https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-ok/mcp

Run in your terminal, then restart Claude Code.

JSON validity · https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-ok/mcp

What you can do

What your AI can do with JSON validity

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “json-ok”: JSON validity.”

“Use “utc-time”: Current UTC timestamp.”

“Use “timezone”: Current time in a named IANA timezone.”

“Use “validate-json”: Check whether a body is valid JSON. The body is discarded.”

Security check

How secure is the JSON validity MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how JSON validity holds up.

✓ Verified directory serverJSON validity · workers.dev

Official endpoint

Operated by JSON validity (workers.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If JSON validity adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on JSON validity's server →

How it works

Connected in three steps

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

Pick JSON validity

Choose JSON validity in the gate directory. No sign-in needed.

Use it anywhere

JSON validity's tools are live in every AI client you've connected — with rules and logging built in.

Connect JSON validity free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools JSON validity exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

json-ok — JSON validity

utc-time — Current UTC timestamp.

timezone — Current time in a named IANA timezone.

validate-json — Check whether a body is valid JSON. The body is discarded.

normalize-url — Return origin, host, and path for a URL. Query and fragment are dropped.

inspect-robots — Fetch a public robots.txt and return group counts only.

domain-shape — Split a hostname into labels without WHOIS or ownership data.

citation — Return host, scheme, and HTTP status for a URL. Page content is not stored.

+ 22 more tools once connected

Author

Who runs the JSON validity MCP server?

workers.dev

More servers from workers.dev →

Own this server? Claim the listing →

Server facts

The JSON validity MCP server at a glance

Endpointhttps://agent-observatory-sensor.nolimit-observatory.workers.dev/s/json-ok/mcp

Operated byJSON validity (workers.dev)

CategoryCommunity

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official JSON validity MCP server?

Yes — JSON validity operates its own remote MCP server at agent-observatory-sensor.nolimit-observatory.workers.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect JSON validity to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick JSON validity in the directory. No account or sign-in is needed. From then on, JSON validity's tools are available in every client you've connected to gate.

Do I need to host anything?

No. JSON validity runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the JSON validity MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.