io.github.violetclaire/popcorn-mcp
POPCORN MCP
Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
alive probed 2026-10-14
6tools
1.9ktokens in Claude Opus 5.5
2.0ktokens in Claude Code
1.0 %of a 200k context window
1.1ko200k_base estimate
599 msto initialize
6 msto list tools
- Run it
- npx -y @violetclaire/popcorn-mcp@0.1.3 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- popcorn 0.1.3
- 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/violetclaire/popcorn-temporal-anchor
- Website
- https://767-2676.com/agents
- Registry
- active, updated 2026-09-16 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| popcorn_witness | 303 | 28 % |
| popcorn_verify | 252 | 23 % |
| popcorn_time | 225 | 21 % |
| popcorn_hash | 125 | 12 % |
| popcorn_sample | 109 | 10 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.violetclaire/popcorn-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.