io.github.tGhattas/sysdesign-board
sketch/design — System Design Interview Board
Is the sketch/design MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-26.
Hand-drawn whiteboard for system design mock interviews; your AI watches, asks and gives feedback.
alive probed 2026-11-14 · unchanged since 2026-10-26
- Run it
- npx -y sysdesign-board@0.1.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- sysdesign-board 0.1.0
- Capabilities
- prompts, tools
- Instructions
- 1 514 characters
- Of a 1M window
- 0.3 % of a 1M context window
- Count
- 3.2k tokens in Claude Opus 5.5, exact, measured 2026-10-26. With the Claude Code prefix mcp__…__ on each tool name: 3.4k. The o200k_base estimate is 1.8k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/tGhattas/sysdesign-board
- Website
- https://github.com/tGhattas/sysdesign-board#readme
- Registry
- active, updated 2026-10-21 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.79×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| draw_on_board | 780 | 435 | 24 % |
| end_interview | 491 | 274 | 15 % |
| start_interview | 384 | 214 | 12 % |
| annotate | 231 | 129 | 7 % |
| wait_for_candidate | 199 | 111 | 6 % |
Compare this server with others.
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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 server answers initialize and tools/list. Nothing to fix.