io.github.kinance/circle-agent-stack-mcp
circle-agent-stack-mcp
Circle Agent Stack for AI agents: USDC wallets, spend policies, transfers, and x402 nanopayments.
alive probed 2026-10-15
6tools
1.7ktokens in Claude Opus 5.5
1.8ktokens in Claude Code
0.9 %of a 200k context window
934o200k_base estimate
343 msto initialize
10 msto list tools
- Run it
- npx -y circle-agent-stack-mcp@0.1.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- circle-agent-stack-mcp 0.1.1
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/kinance/circle-agent-stack-mcp
- Registry
- active, updated 2026-05-31 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| circle_x402_pay | 230 | 25 % |
| circle_policy_set | 227 | 24 % |
| circle_transfer_usdc | 213 | 23 % |
| circle_wallet_create | 143 | 15 % |
| circle_balance | 75 | 8 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.kinance/circle-agent-stack-mcp)
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.