io.github.Tethral-Inc/acr
ACR — Agent Composition Records
Interaction profile registry for AI agents. Log interactions, query behavioral lenses.
alive probed 2026-10-14
7tools
4.3ktokens in Claude Opus 5.5
4.3ktokens in Claude Code
2.1 %of a 200k context window
2.5ko200k_base estimate
172 msto initialize
9 msto list tools
- Run it
- npx -y @tethral/acr-mcp@2.14.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- acr-agent-registry 2.14.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/Tethral-Inc/AgentRegistry
- Website
- https://acr.nfkey.ai
- Registry
- active, updated 2026-07-23 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| log_interaction | 1 450 | 58 % |
| get_friction_report | 344 | 14 % |
| get_notifications | 185 | 7 % |
| acknowledge_signal | 181 | 7 % |
| summarize_my_agent | 137 | 5 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.Tethral-Inc/acr)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.