mcpcost

io.github.whats2000/isaacsim-mcp-server

IsaacSimMCP

Is the io.github.whats2000/isaacsim-mcp-server MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Control NVIDIA Isaac Sim robotics simulator through MCP with 42 tools

alive probed 2026-11-14 · unchanged since 2026-10-31

42tools
16ktokens in Claude Opus 5.5
7.9 %of Claude's 200k window
6.2×the median server
2.9 sto initialize
9 msto list tools
Run it
uvx isaacsim-mcp-server@0.6.1 (stdio, probed in a container with the network off)
Host
pypi.org
Reports itself as
IsaacSimMCP 1.30.0
Capabilities
experimental, prompts, resources, tools
Instructions
3 546 characters
Of a 1M window
1.6 % of a 1M context window
Count
16k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 16k. The o200k_base estimate is 9.2k. Counted again when the tool definitions change. Method.
Repository
https://github.com/whats2000/isaacsim-mcp-server
Registry
active, updated 2026-09-01 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.70×.

Tool≈ Claude tokenso200k estimateShare of this server
create_action_graph1 3137708 %
create_object1 2557368 %
reload_script6803994 %
edit_action_graph6803994 %
step_simulation6393754 %

Compare this server with others.

More servers

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

Servers that mention simulator or robotics.

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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.

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