io.github.karta9821/json2toon
JSON to TOON
Convert JSON to TOON (about 40% fewer LLM tokens) and TOON back to JSON. Free, no auth.
alive probed 2026-10-05 · HTTP 200
2tools
291tokens in Claude Opus 5.5
309tokens in Claude Code
0.1 %of a 200k context window
154o200k_base estimate
9.0 sto initialize
4.5 sto list tools
- Endpoint
- https://json2toon.co/api/mcp (streamable-http)
- Host
- json2toon.co
- Protocol
- 2025-11-25
- Reports itself as
- json2toon 1.0.0
- Capabilities
- tools
- Instructions
- 105 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Website
- https://json2toon.co/mcp
- Registry
- active, updated 2026-10-04 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| json_to_toon | 104 | 68 % |
| toon_to_json | 50 | 32 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:53 | alive | 9.0 s | 2 | 291 | 154 |
| 2026-10-05 00:36 | alive | 9.4 s | 2 | 154 |
Badge
[](https://mcp-pulse.ulehla.dev/s/io.github.karta9821/json2toon)