mcpcost

io.github.aarwitz/tapp

tapp

Is the io.github.aarwitz/tapp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-13.

Test iOS, Android, and web apps with agent exploration, replayable flows, and CI gates.

alive probed 2026-11-14 · unchanged since 2026-11-13

13tools
11ktokens in Claude Opus 5.5
5.7 %of Claude's 200k window
4.5×the median server
327 msto initialize
9 msto list tools
Run it
npx -y @aarwitz/tapp@0.35.6 (stdio, probed in a container with the network off)
Host
npmjs.com
Reports itself as
tapp 0.35.6
Capabilities
prompts, tools
Instructions
984 characters
Of a 1M window
1.1 % of a 1M context window
Count
11k tokens in Claude Opus 5.5, exact, measured 2026-10-26. With the Claude Code prefix mcp__…__ on each tool name: 11k. The o200k_base estimate is 6.6k. Counted again when the tool definitions change. Method.
Repository
https://github.com/aarwitz/tapp
Registry
active, updated 2026-11-13 · registry entry
Changes
3 recorded, reachable in 3 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.72×.

Tool≈ Claude tokenso200k estimateShare of this server
tapp_explore1 9181 11317 %
tapp_session1 68597815 %
tapp_plan1 46585013 %
tapp_run1 21170311 %
tapp_look9255378 %

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More servers

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention tapp.

History

We add a row when the result changes. A server with no change keeps its last row.

ProbedResultInitToolsClaudeo200k
2026-10-26 06:58alive403 ms1311k6.6k
2026-10-24 06:29alive208 ms136.6k
2026-10-17 06:13alive327 ms1311k6.1k

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mcpcost: alive

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

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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