Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "fairseal": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/[email protected]"
      ],
      "env": {
        "FAIRSEAL_API_KEY": "${FAIRSEAL_API_KEY}",
        "FAIRSEAL_NOTARY_API_KEY": "${FAIRSEAL_NOTARY_API_KEY}",
        "FAIRSEAL_ANCHOR_API_KEY": "${FAIRSEAL_ANCHOR_API_KEY}"
      }
    }
  }
}

claude mcp add fairseal -e "FAIRSEAL_API_KEY=${FAIRSEAL_API_KEY}" -e "FAIRSEAL_NOTARY_API_KEY=${FAIRSEAL_NOTARY_API_KEY}" -e "FAIRSEAL_ANCHOR_API_KEY=${FAIRSEAL_ANCHOR_API_KEY}" -- npx -y @fairseal/[email protected]

[mcp_servers.fairseal]
command = "npx"
args = ["-y", "@fairseal/[email protected]"]
env = { "FAIRSEAL_API_KEY" = "${FAIRSEAL_API_KEY}", "FAIRSEAL_NOTARY_API_KEY" = "${FAIRSEAL_NOTARY_API_KEY}", "FAIRSEAL_ANCHOR_API_KEY" = "${FAIRSEAL_ANCHOR_API_KEY}" }

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "fairseal": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@fairseal/[email protected]"
      ],
      "enabled": true,
      "environment": {
        "FAIRSEAL_API_KEY": "{env:FAIRSEAL_API_KEY}",
        "FAIRSEAL_NOTARY_API_KEY": "{env:FAIRSEAL_NOTARY_API_KEY}",
        "FAIRSEAL_ANCHOR_API_KEY": "{env:FAIRSEAL_ANCHOR_API_KEY}"
      }
    }
  }
}

{
  "mcpServers": {
    "fairseal": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/[email protected]"
      ],
      "env": {
        "FAIRSEAL_API_KEY": "${FAIRSEAL_API_KEY}",
        "FAIRSEAL_NOTARY_API_KEY": "${FAIRSEAL_NOTARY_API_KEY}",
        "FAIRSEAL_ANCHOR_API_KEY": "${FAIRSEAL_ANCHOR_API_KEY}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=fairseal&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBmYWlyc2VhbC9tY3Atc2VydmVyQDAuMi40Il0sImVudiI6eyJGQUlSU0VBTF9BUElfS0VZIjoiJHtGQUlSU0VBTF9BUElfS0VZfSIsIkZBSVJTRUFMX05PVEFSWV9BUElfS0VZIjoiJHtGQUlSU0VBTF9OT1RBUllfQVBJX0tFWX0iLCJGQUlSU0VBTF9BTkNIT1JfQVBJX0tFWSI6IiR7RkFJUlNFQUxfQU5DSE9SX0FQSV9LRVl9In19"
}

{
  "servers": {
    "fairseal": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/[email protected]"
      ],
      "env": {
        "FAIRSEAL_API_KEY": "${FAIRSEAL_API_KEY}",
        "FAIRSEAL_NOTARY_API_KEY": "${FAIRSEAL_NOTARY_API_KEY}",
        "FAIRSEAL_ANCHOR_API_KEY": "${FAIRSEAL_ANCHOR_API_KEY}"
      }
    }
  }
}

{
  "mcpServers": {
    "fairseal": {
      "command": "npx",
      "args": [
        "-y",
        "@fairseal/[email protected]"
      ],
      "env": {
        "FAIRSEAL_API_KEY": "${FAIRSEAL_API_KEY}",
        "FAIRSEAL_NOTARY_API_KEY": "${FAIRSEAL_NOTARY_API_KEY}",
        "FAIRSEAL_ANCHOR_API_KEY": "${FAIRSEAL_ANCHOR_API_KEY}"
      }
    }
  }
}

extensions:
  "fairseal":
    enabled: true
    name: "fairseal"
    type: stdio
    cmd: "npx"
    args:
      - "-y"
      - "@fairseal/[email protected]"
    envs:
      "FAIRSEAL_API_KEY": "${FAIRSEAL_API_KEY}"
      "FAIRSEAL_NOTARY_API_KEY": "${FAIRSEAL_NOTARY_API_KEY}"
      "FAIRSEAL_ANCHOR_API_KEY": "${FAIRSEAL_ANCHOR_API_KEY}"
    timeout: 300

Placeholders to fill from your own secret store: ${FAIRSEAL_API_KEY}, ${FAIRSEAL_NOTARY_API_KEY}, ${FAIRSEAL_ANCHOR_API_KEY}. The registry never accepts secret values.

This is a local package: the command runs on your machine.

Quality – / 100not scored

Not scored: fewer than three checks apply, usually because no remote answered a credential-free probe or the server is a local package.

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvabledeps.dev does not know @fairseal/[email protected]

Tool list unknown · checked 2026-10-20 15:57 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 94 / 100

provenance85

livenessn/a

freshness100

hygiene100

+repository +dns-namespace +website ~liveness-unmeasured +updated-21d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@fairseal/[email protected] npmthis version is not known to the dependency resolver

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

package	registry	version	runtime	secrets
`@fairseal/mcp-server`	npm	0.2.4	–	`FAIRSEAL_API_KEY`, `FAIRSEAL_NOTARY_API_KEY`, `FAIRSEAL_ANCHOR_API_KEY`

Tools (0)

No tools observed. Local packages are never executed by the registry.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.fairseal/mcp-server",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.2.4",
  "packages": [
    {
      "version": "0.2.4",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@fairseal/mcp-server",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "FAIRSEAL_API_KEY",
          "isSecret": true,
          "description": "API 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."
        },
        {
          "name": "FAIRSEAL_API_URL",
          "description": "Upstream API base URL (default https://api.fairseal.io)."
        },
        {
          "name": "FAIRSEAL_NOTARY_API_KEY",
          "isSecret": true,
          "description": "Key override for the notary service only (POST /v1/notarize). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: fsn_."
        },
        {
          "name": "FAIRSEAL_ANCHOR_API_KEY",
          "isSecret": true,
          "description": "Key override for Anchor API v2 only (POST /v2/anchor). Falls back to FAIRSEAL_API_KEY if not set. Key prefix: anck_."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/ned-del/fairseal",
    "source": "github"
  },
  "websiteUrl": "https://fairseal.io",
  "description": "Verifiable entropy, provably-fair games, and receipt verification for AI agents (FairSeal API)."
}

Fairseal