io.github.trustabl/agent-network-access-probe

Trustabl Probe

Is the Trustabl Probe MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-27.

Drafts a network allow list for agent tools and runs them in a network-blocked sandbox.

alive probed 2026-11-14 · unchanged since 2026-10-27

3tools

1.0ktokens in Claude Opus 5.5

0.5 %of Claude's 200k window

0.4×the median server

132 msto initialize

6 msto list tools

Run it: npx -y @trustabl/agent-network-access-probe@0.5.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: agent-network-access-probe 0.5.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.1 % of a 1M context window
Count: 1.0k tokens in Claude Opus 5.5, exact, measured 2026-10-27. With the Claude Code prefix mcp__…__ on each tool name: 1.1k. The o200k_base estimate is 592. Counted again when the tool definitions change. Method.
Repository: https://github.com/trustabl/agent-network-access-probe
Website: https://trustabl.ai
Registry: active, updated 2026-10-27 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.73×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
probe_scan	541	312	53 %
probe_install	317	183	31 %
probe_check_setup	168	97	16 %

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

Servers that mention network.

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.