Shinjuku Shield

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-11-11T08:28:33.568997Z",
      "publishedAt": "2026-11-11T08:28:33.568997Z",
      "statusChangedAt": "2026-11-11T08:28:33.568997Z"
    }
  },
  "server": {
    "name": "io.github.ShinjukuStaition/shinjuku-shield",
    "title": "Shinjuku Shield",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "0.3.210",
    "packages": [
      {
        "version": "0.3.210",
        "transport": {
          "type": "stdio"
        },
        "identifier": "shinjuku-shield",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "packageArguments": [
          {
            "type": "positional",
            "value": "mcp",
            "valueHint": "command",
            "description": "The wallet command that runs the MCP server on stdio."
          },
          {
            "name": "--max-payment",
            "type": "named",
            "format": "number",
            "description": "The most one payment may cost, in USDC (0.05 = 5 cents). Optional (default: no limit); setup writes the caps you set to config.json.",
            "placeholder": "0.05"
          },
          {
            "name": "--max-session",
            "type": "named",
            "format": "number",
            "description": "The most this wallet may pay in any 24 hours, from every MCP process together, in USDC (0.2 = 20 cents). Optional (default: no limit); setup writes the caps you set to config.json.",
            "placeholder": "0.2"
          },
          {
            "name": "--pool",
            "type": "named",
            "default": "CDtxyRjCUs2pu7t3U9TwtpnZwyxBFZ4dKXvb4RCmXHXv",
            "description": "The shielded pool. The wallet file is $SHIELDED_WALLET_HOME/<pool>/wallet.json."
          },
          {
            "name": "--program",
            "type": "named",
            "default": "8PYPw3FSFTMbvSneXdcoH6jNoN4VD23nHwPY2A2riUy1",
            "description": "The shielded pool program."
          },
          {
            "name": "--memo-service",
            "type": "named",
            "default": "https://pay.shinjukustaition.com",
            "description": "The facilitator that serves the encrypted memos. Its RPC relay serves reads without --rpc-file."
          },
          {
            "name": "--passphrase-file",
            "type": "named",
            "format": "filepath",
            "description": "Absolute path of a private file that holds the wallet passphrase. Without it, SHIELDED_WALLET_PASSPHRASE."
          },
          {
            "name": "--proof-tools",
            "type": "named",
            "format": "filepath",
            "description": "Absolute path of proof-tools.json. Turns wallet_shield on and is needed to pay shielded-exact."
          },
          {
            "name": "--exit-proof-tools",
            "type": "named",
            "format": "filepath",
            "description": "Absolute path of exit-proof-tools.json. With --profile and --proof-tools, turns wallet_unshield on."
          },
          {
            "name": "--profile",
            "type": "named",
            "format": "filepath",
            "description": "Absolute path of public-profile.json (the facilitator's public profile). Needed for wallet_unshield."
          },
          {
            "name": "--unshield-to",
            "type": "named",
            "isRepeated": true,
            "description": "A public Solana address that wallet_unshield sends to with no confirmation. Never the wallet's own key."
          },
          {
            "name": "--max-unshield",
            "type": "named",
            "format": "number",
            "description": "The most one wallet_unshield call may send, and the most this wallet may send in any 24 hours, in USDC (1 = 1 USDC)."
          },
          {
            "name": "--max-shield",
            "type": "named",
            "format": "number",
            "description": "The most one wallet_shield deposit may move, and the most this wallet may shield in any 24 hours, in USDC (1 = 1 USDC)."
          },
          {
            "name": "--max-per-host-day",
            "type": "named",
            "format": "number",
            "description": "The most one seller host may receive in 24 hours, in USDC."
          },
          {
            "name": "--allow-host",
            "type": "named",
            "isRepeated": true,
            "description": "Pay only this seller host (host or host:port)."
          },
          {
            "name": "--rpc-file",
            "type": "named",
            "format": "filepath",
            "description": "Absolute path of a private file with your own Solana RPC URL. Without it, reads go to the facilitator relay."
          },
          {
            "name": "--no-auto-pockets",
            "type": "named",
            "description": "Stop the idle return of pockets that an older version filled to the shielded balance. Standard exact sellers are paid through Shinjuku (float pay); no pocket is filled."
          }
        ],
        "runtimeArguments": [
          {
            "name": "--no-audit",
            "type": "named",
            "description": "npx skips npm's audit request when it installs a new version (that request once held the start for 5 minutes)."
          },
          {
            "name": "--no-fund",
            "type": "named",
            "description": "npx skips npm's funding message when it installs a new version."
          }
        ],
        "environmentVariables": [
          {
            "name": "SHIELDED_WALLET_HOME",
            "format": "filepath",
            "description": "The private folder that holds the encrypted wallet and config.json. Default: ~/.carbon-shielded-wallet (the folder that setup uses)."
          },
          {
            "name": "SHIELDED_WALLET_PASSPHRASE",
            "isSecret": true,
            "description": "The wallet passphrase, if you do not use --passphrase-file."
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/ShinjukuStaition/shinjuku-shield",
      "source": "github"
    },
    "websiteUrl": "https://shinjukustaition.com",
    "description": "Private x402 payments on Solana: shield, pay, and unshield USDC under caps you set."
  }
}