JSON to TOON MCP Server

by karta9821 Your server? Claim it

answering

JSON to TOON is answering right now. Last checked 12 min ago. It exposes 2 tools.

Convert JSON to TOON (about 43% fewer LLM tokens) and TOON back to JSON. Free, no auth.

Uptime history 38 days of history · worst day 4%

38 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

1090 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 9 October 2026. No other catalogue keeps this.

9 Oct a tool description was rewritten json_to_toon

Nothing serious here today

Today is the operative word: we check JSON to TOON every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add json2toon --transport http https://json2toon.co/api/mcp

Settings → Connectors → Add custom connector, then paste this address

https://json2toon.co/api/mcp

~/.codex/config.toml

[mcp_servers.json2toon]
url = "https://json2toon.co/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "json2toon": {
      "url": "https://json2toon.co/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "json2toon": {
      "type": "http",
      "url": "https://json2toon.co/api/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

json

json_to_toon

Convert JSON to TOON (Token-Oriented Object Notation), a compact format that uses about 43% fewer LLM tokens than JSON on average. Best for uniform arrays of objects.

toon

toon_to_json

Decode a TOON document back to pretty-printed JSON.

Endpoints

URL	Transport	State	Latency	Checked
https://json2toon.co/api/mcp	streamable-http	answering	857 ms	12 min ago

Alternatives to JSON to TOON

same job, measured the same way

Xkcd

by pipeworx-io

XKCD MCP — wraps xkcd.com JSON API (free, no auth)

311 installs/wk 47 tools answering

SheetShift

by everyai-com

Convert and clean tables: CSV, JSON, dedupe, stats. Free.

4 tools answering

Agent Toolbox

by johngee518

Free, no-key MCP server: token estimates, JSON Schema conversion, MCP configs, tool search.

4 tools answering

CafeDev

by cafedev

Search free LATAM tech jobs and companies on CafeDev (no auth).

4 tools answering

Automaton Colony

by automatoncolony

Screen Base smart contracts and B20 tokens: free on-chain check, paid Flash Audit over x402 (USDC).

6 tools answering

Devtools MCP

by pianam-mcp

Developer toolkit: UUID, timestamp, unit conversion, JSON tools, and QR code (SVG). Free.

7 tools answering

TOML YAML JSON MCP

by mukundakatta

Parse, format, and convert configs across TOML, YAML, and JSON.

49 installs/wk local only

JWT Tools MCP

by mrfentmen

Decode and verify JSON Web Tokens locally. No network and no key.

59 installs/wk local only

JSON to TOON — questions

Answers built from our own checks of this server.

What can JSON to TOON do?

It exposes 2 tools, read directly from the server on our last check. Among them: json_to_toon, toon_to_json. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is JSON to TOON working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1090 ms. The bar chart above shows every period we have measured.

How do I connect JSON to TOON?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does JSON to TOON need an API key?

No. JSON to TOON completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is JSON to TOON?

It answers our handshake in 1090 ms on average, which is faster than 3% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.