com.profullstack/r4ck
r4ck
Is the r4ck MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-12.
Server/VPS/GPU offer search (r4ck.dev)
alive probed 2026-11-14 · unchanged since 2026-11-12 · HTTP 200
23tools
6.4ktokens in Claude Opus 5.5
3.2 %of Claude's 200k window
2.5×the median server
1.2 sto initialize
97 msto list tools
- Endpoint
- https://r4ck.dev/mcp (streamable-http)
- Host
- r4ck.dev
- Protocol
- 2025-11-25
- Reports itself as
- r4ck 1.0.0
- Capabilities
- prompts, resources, tools
- Instructions
- 845 characters
- Of a 1M window
- 0.6 % of a 1M context window
- Count
- 6.4k tokens in Claude Opus 5.5, exact, measured 2026-11-12. With the Claude Code prefix mcp__…__ on each tool name: 6.6k. The o200k_base estimate is 3.5k. Counted again when the tool definitions change. Method.
- Website
- https://r4ck.dev
- Registry
- active, updated 2026-11-11 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.82×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| search_servers | 1 060 | 583 | 17 % |
| save_search | 1 054 | 580 | 16 % |
| cheapest | 1 023 | 563 | 16 % |
| facets | 1 016 | 559 | 16 % |
| list_providers | 267 | 147 | 4 % |
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.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.