io.fairseal/mcp-server

io.fairseal/mcp-server

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

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/mcp-server@0.2.4"
      ],
      "env": {
        "FAIRSEAL_API_KEY": "<your FAIRSEAL_API_KEY>",
        "FAIRSEAL_NOTARY_API_KEY": "<your FAIRSEAL_NOTARY_API_KEY>",
        "FAIRSEAL_ANCHOR_API_KEY": "<your FAIRSEAL_ANCHOR_API_KEY>"
      }
    }
  }
}
Environment variables
  • FAIRSEAL_API_KEYsecretAPI key for gated tools (fairseal_entropy, fairseal_stats, fairseal_rng_generate, fairseal_notarize_decision, fairseal_anchor_submit). Key prefix: fsn_. Without a key these tools return 401; free tools (game reads, notarize_status, anchor_status) work without any key. x402 micropayment ($0.02 USDC on Base) is an alternative to the key for notarize/anchor.
  • FAIRSEAL_NOTARY_API_KEYsecretKey override for the notary service only (POST /v1/notarize). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: fsn_.
  • FAIRSEAL_ANCHOR_API_KEYsecretKey override for Anchor API v2 only (POST /v2/anchor). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: anck_.

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
AI & ML
Version
0.2.4
Registry
active
Published
9/30/2026

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