app.promptcoin/provably-fair
Provably Fair
Pick giveaway and raffle winners nobody can rig — verifiable by anyone, no API key.
alive probed 2026-10-14
3tools
795tokens in Claude Opus 5.5
825tokens in Claude Code
0.4 %of a 200k context window
470o200k_base estimate
407 msto initialize
11 msto list tools
- Run it
- npx -y provably-fair-mcp@1.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- provably-fair 1.0.0
- 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/gadaffihub/provably-fair-mcp
- Website
- https://promptcoin.app/fair
- Registry
- deprecated, updated 2026-08-08 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| create_scheduled_draw | 211 | 45 % |
| pick_winner_now | 177 | 38 % |
| verify_draw | 82 | 17 % |
Same tool set as 0 other servers
These registry entries have the same tool names and the same schema sizes.
Badge and feed
[](https://mcpcost.ulehla.dev/s/app.promptcoin/provably-fair)
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.