jp.debuff/debuff
debuff
Let coding agents play, test and tune your 2D web game: live state, explained errors, replays, fuzz.
alive probed 2026-10-19
21tools
≈ 2.4ktokens, estimate
≈ 1.2 %of Claude's 200k window
1.7×the median server
377 msto initialize
12 msto list tools
- Run it
- npx -y @debuffjp/mcp@0.9.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- debuff 0.9.0
- Capabilities
- prompts, tools
- Instructions
- 923 characters
- Of a 1M window
- ≈ 0.2 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: invalid x-api-key. The estimate stands in.
- Repository
- https://github.com/debuffjp/debuff
- Website
- https://debuff.jp/docs/agents
- Registry
- active, updated 2026-10-19 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| fuzz | 279 | 12 % |
| run_tests | 167 | 7 % |
| game_start | 165 | 7 % |
| game_rewind | 156 | 7 % |
| game_replay | 153 | 6 % |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The Anthropic count_tokens endpoint refused the tool schemas (invalid x-api-key). A client that validates schemas can refuse them too.