# Giveaway & Raffle Winner Picker (provably fair) (npm · provably-fair-mcp)

Pick giveaway and raffle winners nobody can rig — verifiable by anyone, no API key.

- Trust score: 69/100 (medium)
- Change this week: −2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-18

## Components

- npm · `provably-fair-mcp`: 69/100 (this document), [markdown](https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp.md), [page](https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp)

## Channel facts

- Registry: `npm`
- Package: `provably-fair-mcp`
- Version: `1.0.4`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-18.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 30 of 96 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: the declared repository URL returned HTTP 404.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 9 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 79/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 299 tokens (~99/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 33/100
  - Stability observed for 10 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add app-promptcoin-giveaway-raffle-winner-picker -- npx -y provably-fair-mcp
```

### Codex

```bash
codex mcp add app-promptcoin-giveaway-raffle-winner-picker -- npx -y provably-fair-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "app-promptcoin-giveaway-raffle-winner-picker": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "provably-fair-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add app-promptcoin-giveaway-raffle-winner-picker --command npx --arg -y --arg provably-fair-mcp
```

### Hermes

```yaml
mcp_servers:
  app-promptcoin-giveaway-raffle-winner-picker:
    command: "npx"
    args: ["-y", "provably-fair-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "app-promptcoin-giveaway-raffle-winner-picker": {
      "command": "npx",
      "args": [
        "-y",
        "provably-fair-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-17 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-16 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-13 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-12 (score 66, −5)

- [security regression] Source repository: pass → fail
- [functional regression] Security disclosure: fail → unverified

### 2026-08-11 (score 71, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-08-10 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-09 (score 69, 0)

- [security regression] Source repository: pass → fail
- [functional improvement] Stability: unverified → 0.03
- [functional] Package version: 1.0.3 → 1.0.4

### 2026-08-08 (score 69)

First indexed and scored.

## MCP tools (3)

### `pick_winner_now` (~115 tokens)

Instantly pick a provably-fair random winner (or winners) from a list of entrants. The randomness comes from the public drand beacon, so the result is verifiable and cannot be rigged. Use for giveaways, raffles, fair selection, tie-breaks, or any 'pick one at random, provably' need.

Input parameters:

- `entrants` (array, required): List of entrants (names, @handles, wallet addresses, anything).
- `winners` (integer): How many winners to pick (default 1).

### `create_scheduled_draw` (~141 tokens)

Create a provably-fair draw that reveals its winner at a FUTURE time. The randomness round is committed the instant you create it — before it exists — so no one (not even the operator) can predict or rig the outcome. Returns a public, shareable proof page. Ideal when entries are still open or you want a verifiable, scheduled reveal.

Input parameters:

- `delay_sec` (integer): Seconds until the draw (min 120, default 600).
- `entrants` (array, required): List of entrants.
- `title` (string, required): Name of the draw/giveaway.
- `winners` (integer): Number of winners (default 1).

### `verify_draw` (~43 tokens)

Fetch the current state and verifiable result of a provably-fair draw by its id (from create_scheduled_draw).

Input parameters:

- `id` (string, required): The draw id.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp#diagnostics

## Score history

- 2026-08-18: 69
- 2026-08-17: 69
- 2026-08-16: 68
- 2026-08-15: 67
- 2026-08-14: 67
- 2026-08-13: 67
- 2026-08-12: 66
- 2026-08-11: 71
- 2026-08-10: 70
- 2026-08-09: 69
- 2026-08-08: 69

## Links

- npm package: https://www.npmjs.com/package/provably-fair-mcp
- Socket report: https://socket.dev/npm/package/provably-fair-mcp
- Website: https://promptcoin.app/fair
- Changelog RSS feed: https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp.json
- HTML version of this page: https://verifymcp.io/servers/app-promptcoin-giveaway-raffle-winner-picker/provably-fair-mcp