ai.circulara/plugin

circulara

Is the ai.circulara/plugin MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Circulara Observe MCP plugin - meters your AI agents' token spend and carbon, free tier.

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

2tools

330tokens in Claude Opus 5.5

0.2 %of Claude's 200k window

0.1×the median server

238 msto initialize

7 msto list tools

Run it: npx -y @circulara/plugin@0.1.2 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: circulara 0.1.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 330 tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 346. The o200k_base estimate is 182. Counted again when the tool definitions change. Method.
Repository: https://github.com/CircularRoute/circulara-core
Registry: active, updated 2026-07-09 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.81×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
circulara_report	254	140	77 %
circulara_status	76	42	23 %

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

Servers that mention observe or carbon.

Contractor Licence Changes agency.ottobot/contractor-license-changes · alive
app.aplusz/flight-fares · alive
WattScope au.com.wattscope/wattscope · needs auth
Campaign Incrementality Audit com.a2awire/benchmark-campaign-incrementality-audit-v1 · alive
Bankruptcy Observer com.bankruptcyobserver/mcp · alive
Glasswarp com.glasswarp/mcp-server · alive
com.greencalculus/api · alive
HasData Google Flights com.hasdata/google-flights · 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.

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