# io.github.ned-del/fairseal-mcp-server (npm · @fairseal/mcp-server)

Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API).

- Trust score: 79/100 (medium)
- Change this week: −1
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `@fairseal/mcp-server`: 79/100 (this document), [markdown](https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server.md), [page](https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@fairseal/mcp-server`
- Version: `0.1.3`
- 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 2026-09-20.

- **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.
  - 31 of 95 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 5 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 768 tokens (~59/item across 13 items; 13 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 83/100
  - Stability observed for 25 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 79/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 36% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 13 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.ned-del/fairseal-mcp-server server?

io.github.ned-del/fairseal-mcp-server runs locally as an npm package, launched with npx -y @fairseal/mcp-server. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add ned-del-fairseal-mcp-server -- npx -y @fairseal/mcp-server
```

### Cursor

```json
{
  "mcpServers": {
    "ned-del-fairseal-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/mcp-server"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ned-del-fairseal-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/mcp-server"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add ned-del-fairseal-mcp-server -- npx -y @fairseal/mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ned-del-fairseal-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@fairseal/mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ned-del-fairseal-mcp-server --command npx --arg -y --arg @fairseal/mcp-server
```

### Hermes

```yaml
mcp_servers:
  ned-del-fairseal-mcp-server:
    command: "npx"
    args: ["-y", "@fairseal/mcp-server"]
```

### Netclaw

```json
{
  "McpServers": {
    "ned-del-fairseal-mcp-server": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@fairseal/mcp-server"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add ned-del-fairseal-mcp-server -t stdio -c npx -a -y @fairseal/mcp-server
```

### Other

```json
{
  "mcpServers": {
    "ned-del-fairseal-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/mcp-server"
      ]
    }
  }
}
```

## 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.

### 2026-09-19 (score 79, −3)

- [functional] Stability: pass → 0.80

### 2026-09-17 (score 82, +1)

- [security] Stability: 0.97 → pass

### 2026-09-15 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-11 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-05 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (13)

### `fairseal_entropy` (~39 tokens)

Get verifiable entropy

Fetch raw verifiable entropy from the latest resolved VDF epoch at api.fairseal.io. Read-only. [requires FAIRSEAL_API_KEY]

### `fairseal_games_catalog` (~37 tokens)

List FairSeal games

List available provably-fair games (sicbo, dice, gacha, slots) with bet types and endpoints. Read-only.

### `fairseal_stats` (~26 tokens)

Engine stats

FairSeal entropy engine statistics. Read-only. [requires FAIRSEAL_API_KEY]

### `fairseal_recent_games` (~27 tokens)

Recent games

List recently resolved games (useful to find game_ids to verify). Read-only.

### `fairseal_game_result` (~93 tokens)

Get game result

Fetch the result of a game by game_id (poll until resolved). Read-only.

Input parameters:

- `game_id` (string, required): Game ID — 64-char hex hash, e.g. 64096a172374489ccd4563d7c15efe5e467604dd826149da0511a0fa6109e26f (get one from fairseal_recent_games or a bet tool response)

### `fairseal_verify_game` (~45 tokens)

Verify game fairness

Verify the fairness of a completed game. Returns VDF proof data and replay steps for independent verification. Read-only.

Input parameters:

- `game_id` (string, required): Game ID to verify

### `fairseal_rng_generate` (~59 tokens)

Generate verifiable RNG

Request raw verifiable random number generation (resolves after next VDF epoch, ~5s). Returns a poll URL / game_id. [requires FAIRSEAL_API_KEY]

Input parameters:

- `client_seed` (string): Optional client-provided seed

### `fairseal_sicbo_bet` (~108 tokens)

Place Sic Bo bet

Place a three-dice Sic Bo bet. Outcomes provably fair via VDF. Resolves after next epoch (~5s); use fairseal_game_result to poll.

Input parameters:

- `amount` (number)
- `bet_type` (string, required)
- `combo` (array): Dice combination for combo bets
- `player_id` (string)
- `player_seed` (string)
- `target` (integer): Target value (total/single/double/triple bets)

### `fairseal_dice_bet` (~83 tokens)

Place Dice bet

Place a two-dice bet (exact/over7/under7/odd/even). Resolves after next epoch (~5s).

Input parameters:

- `amount` (number)
- `bet_type` (string, required)
- `player_id` (string)
- `player_seed` (string)
- `target` (integer): Target sum for exact bets

### `fairseal_gacha_pull` (~52 tokens)

Gacha pull

Pull a weighted loot box (standard or premium pool). Provably fair via VDF.

Input parameters:

- `player_id` (string)
- `player_seed` (string)
- `pool` (string)

### `fairseal_slots_spin` (~55 tokens)

Slots spin

Spin the 5-reel 3-row slot machine with wild substitution. Provably fair via VDF.

Input parameters:

- `amount` (number)
- `player_id` (string)
- `player_seed` (string)

### `fairseal_anchor_submit` (~74 tokens)

Submit anchor (preview stub)

PREVIEW STUB of the future Anchor API v2 (POST /v2/anchor). Simulates queuing a commitment hash for Merkle-batch anchoring to Base. No payment, no chain writes.

Input parameters:

- `payload_hash` (string, required): SHA-256 hex digest of the receipt/commitment to anchor

### `fairseal_anchor_status` (~70 tokens)

Anchor status (preview stub)

PREVIEW STUB of the future Anchor API v2 (GET /v2/anchor/{id}). Each poll advances the simulated lifecycle: queued → batched (Merkle proof) → anchored (simulated tx hash).

Input parameters:

- `anchor_id` (string, required): Anchor ID from fairseal_anchor_submit

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server#diagnostics

## Score history

- 2026-09-20: 79
- 2026-09-19: 79
- 2026-09-18: 82
- 2026-09-17: 82
- 2026-09-16: 81
- 2026-09-15: 81
- 2026-09-14: 80
- 2026-09-13: 80
- 2026-09-12: 79
- 2026-09-11: 79
- 2026-09-10: 78
- 2026-09-09: 78
- 2026-09-08: 77
- 2026-09-07: 77
- 2026-09-06: 76
- 2026-09-05: 76
- 2026-09-04: 75
- 2026-09-03: 75
- 2026-09-02: 75
- 2026-09-01: 74
- 2026-08-31: 74
- 2026-08-30: 73
- 2026-08-29: 73
- 2026-08-28: 72
- 2026-08-27: 72
- 2026-08-26: 71
- 2026-08-25: 69
- 2026-08-24: 69
- 2026-08-23: 68
- 2026-08-22: 67

## Common questions

### What is the io.github.ned-del/fairseal-mcp-server server?

io.github.ned-del/fairseal-mcp-server is listed in the public MCP registry as io.github.ned-del/fairseal-mcp-server. Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API). This page covers its npm package (@fairseal/mcp-server).

### Is the io.github.ned-del/fairseal-mcp-server server safe to use?

io.github.ned-del/fairseal-mcp-server scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.ned-del/fairseal-mcp-server server expose?

io.github.ned-del/fairseal-mcp-server exposes 13 tools: fairseal_entropy, fairseal_games_catalog, fairseal_stats, fairseal_recent_games, fairseal_game_result, and 8 more. Their descriptions and schemas cost roughly 768 tokens of context every time the server is loaded.

### Is the io.github.ned-del/fairseal-mcp-server server still maintained?

io.github.ned-del/fairseal-mcp-server is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.ned-del/fairseal-mcp-server server under?

io.github.ned-del/fairseal-mcp-server declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@fairseal/mcp-server
- Socket report: https://socket.dev/npm/package/@fairseal/mcp-server
- Repository: https://github.com/fairseal-io/fairseal
- Website: https://fairseal.io/
- Changelog RSS feed: https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server.xml
- Changelog JSON feed: https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server.json
- HTML version of this page: https://verifymcp.io/servers/ned-del-fairseal-mcp-server/fairseal-mcp-server