io.github.itelo/view-sim

view-sim

Is the view-sim MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.

See a site on phones, tablets and laptops in Safari, Chrome, Firefox or Zen frames; PNG screenshots.

alive probed 2026-11-14 · unchanged since 2026-10-30

9tools

3.2ktokens in Claude Opus 5.5

1.6 %of Claude's 200k window

1.3×the median server

1.1 sto initialize

30 msto list tools

Run it: npx -y view-sim-mcp@1.0.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: view-sim 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.3 % of a 1M context window
Count: 3.2k tokens in Claude Opus 5.5, exact, measured 2026-10-30. With the Claude Code prefix mcp__…__ on each tool name: 3.3k. The o200k_base estimate is 1.8k. Counted again when the tool definitions change. Method.
Repository: https://github.com/itelo/view-sim
Website: https://github.com/itelo/view-sim
Registry: active, updated 2026-10-29 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.77×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
view_sim_headless_screenshot	872	492	27 %
view_sim_open	585	330	18 %
view_sim_screenshot	539	304	17 %
view_sim_set_devices	368	208	11 %
view_sim_set_options	283	160	9 %

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

Servers that mention view.

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

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.