io.github.BoltCreative/tab-hammer
Tab Hammer
Is the Tab Hammer MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-07.
List, group, move, focus, open, and close browser tabs through the Tab Hammer extension.
alive probed 2026-11-14 · unchanged since 2026-11-07
- Run it
- npx -y tab-hammer-mcp@0.1.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- tab-hammer 0.1.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.2 % of a 1M context window
- Count
- 1.7k tokens in Claude Opus 5.5, exact, measured 2026-11-07. With the Claude Code prefix mcp__…__ on each tool name: 1.7k. The o200k_base estimate is 943. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/BoltCreative/tab-hammer
- Website
- https://github.com/BoltCreative/tab-hammer#connect-an-ai-agent-mcp
- Registry
- active, updated 2026-11-06 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.76×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| group_tabs | 322 | 183 | 19 % |
| move_tabs | 308 | 175 | 19 % |
| update_group | 215 | 122 | 13 % |
| open_tabs | 178 | 101 | 11 % |
| close_tabs | 176 | 100 | 11 % |
Compare this server with others.
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Servers that mention hammer.
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- Umbra open SAR archive io.github.reesehammer/umbra-mcp · alive
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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.