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Penny Engine — Agent Operations

Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery.

使うべきか

品質と安全性

A
説明の品質
94%
スキーマの完全性
81%
命名の品質
80%
ポイズニングのリスク
100%
権限の一致
90%
プロトコルへの準拠
100%

検出事項（1）

  • LOWTool 'penny_url_clean' suggests web access but openWorldHint=falsepenny_url_clean 内

ツール定義とプロトコルへの準拠に関する自動分析に基づいています。

コンテキストコスト

~1,957トークン数（ツール定義）
~745 B一般的なレスポンスサイズ
注意への影響は中程度（128k コンテキストの 1.53%）

これは、サーバーのツールがモデルのコンテキストに読み込まれるたびに消費されるおおよそのトークン数です。数が多いほど、ほかのタスクに使える注意が減ります。

インストール

ワンクリックインストール

これを `claude_desktop_config.json` ファイルに追加してください:

{
  "mcpServers": {
    "penny-engine": {
      "url": "https://penny-agent-api-production.up.railway.app/mcp"
    }
  }
}

リモートエンドポイント

https://penny-agent-api-production.up.railway.app/mcpstreamable-http

できること

ツール一覧

ツール（16）

🟢 読み取り専用🟡 書き込み🔴 削除⚪ 不明
🟢penny_margin(price, variableCost, fixedCost)

Unit margin, markup and break-even units. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "price": {
      "type": "number"
    },
    "variableCost": {
      "type": "number"
    },
    "fixedCost": {
      "type": "number"
    }
  },
  "required": [
    "price",
    "variableCost"
  ],
  "additionalProperties": false
}
🟢penny_cleaning_quote(hours, hourlyWage, laborBurdenPct, suppliesUsd, overheadUsd, ...)

Commercial cleaning quote by labor and target margin. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "hours": {
      "type": "number"
    },
    "hourlyWage": {
      "type": "number"
    },
    "laborBurdenPct": {
      "type": "number"
    },
    "suppliesUsd": {
      "type": "number"
    },
    "overheadUsd": {
      "type": "number"
    },
    "targetMarginPct": {
      "type": "number"
    }
  },
  "required": [
    "hours",
    "hourlyWage"
  ],
  "additionalProperties": false
}
🟢penny_marketplace_profit(salePrice, productCost, shippingCost, shippingCharged, platformFeePct, ...)

Ecommerce net contribution after goods, fees, ads and shipping. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "salePrice": {
      "type": "number"
    },
    "productCost": {
      "type": "number"
    },
    "shippingCost": {
      "type": "number"
    },
    "shippingCharged": {
      "type": "number"
    },
    "platformFeePct": {
      "type": "number"
    },
    "platformFeeFixed": {
      "type": "number"
    },
    "adCost": {
      "type": "number"
    }
  },
  "required": [
    "salePrice",
    "productCost"
  ],
  "additionalProperties": false
}
🟢penny_target_price(cost, feePct, feeFixed, targetMarginPct)

Find minimum price for target gross margin after fees. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "cost": {
      "type": "number"
    },
    "feePct": {
      "type": "number"
    },
    "feeFixed": {
      "type": "number"
    },
    "targetMarginPct": {
      "type": "number"
    }
  },
  "required": [
    "cost"
  ],
  "additionalProperties": false
}
🟢penny_campaign_economics(costPerClick, conversionRatePct, contributionPerOrderUsd)

Customer acquisition cost and break-even click price. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "costPerClick": {
      "type": "number"
    },
    "conversionRatePct": {
      "type": "number"
    },
    "contributionPerOrderUsd": {
      "type": "number"
    }
  },
  "required": [
    "costPerClick",
    "conversionRatePct",
    "contributionPerOrderUsd"
  ],
  "additionalProperties": false
}
🟢penny_subscription_ltv(pricePerMonth, monthlyChurnPct, grossMarginPct, acquisitionCostUsd)

Simple monthly churn lifetime value estimates. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "pricePerMonth": {
      "type": "number"
    },
    "monthlyChurnPct": {
      "type": "number"
    },
    "grossMarginPct": {
      "type": "number"
    },
    "acquisitionCostUsd": {
      "type": "number"
    }
  },
  "required": [
    "pricePerMonth",
    "monthlyChurnPct"
  ],
  "additionalProperties": false
}
🟢penny_url_clean(url, removeAllQuery)

Remove common tracking parameters from HTTP links without fetching. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    },
    "removeAllQuery": {
      "type": "boolean"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}
🟢penny_slugify(text)

Turn a short string into a lowercase ASCII URL slug. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string"
    }
  },
  "required": [
    "text"
  ],
  "additionalProperties": false
}
🟢penny_json_inspect(text)

Parse and inspect bounded JSON input without retaining it. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string"
    }
  },
  "required": [
    "text"
  ],
  "additionalProperties": false
}
🟢penny_html_extract(html)

Extract structured page title, meta tags, headings and JSON-LD from supplied HTML without browsing or executing scripts. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "html": {
      "type": "string"
    }
  },
  "required": [
    "html"
  ],
  "additionalProperties": false
}
🟢penny_csv_to_json(csv)

Transform CSV text into a bounded array of JSON records with quoted cell support. Free, no signup, deterministic.

入力スキーマ

{
  "type": "object",
  "properties": {
    "csv": {
      "type": "string"
    }
  },
  "required": [
    "csv"
  ],
  "additionalProperties": false
}
🟢penny_catalog_audit(items, targetMarginPct)

Batch-audit up to 50 product records for duplicate SKUs, missing attributes, malformed URLs and estimated net contribution per order. Useful for scheduled ecommerce catalog ingestion and agent product publishing. No external network calls. Free, no signup.

入力スキーマ

{
  "type": "object",
  "properties": {
    "items": {
      "type": "array",
      "minItems": 1,
      "maxItems": 50,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "sku": {
            "type": "string",
            "maxLength": 100
          },
          "name": {
            "type": "string",
            "maxLength": 200
          },
          "price": {
            "type": "number",
            "minimum": 0
          },
          "cost": {
            "type": "number",
            "minimum": 0
          },
          "shippingCost": {
            "type": "number",
            "minimum": 0
          },
          "feePct": {
            "type": "number",
            "minimum": 0,
            "maximum": 70
          },
          "url": {
            "type": "string",
            "maxLength": 1000
          }
        },
        "required": [
          "sku",
          "name"
        ]
      }
    },
    "targetMarginPct": {
      "type": "number",
      "minimum": -100,
      "maximum": 95
    }
  },
  "required": [
    "items"
  ],
  "additionalProperties": false
}
🟢penny_trend_radar(limit, commercialOnly)

Get recent US Google Trends rising-search queries and transparent heuristic purchase-intent classification to identify digital product research candidates. Public RSS, cached 10 minutes, no customer or sales data. Free, no signup.

入力スキーマ

{
  "type": "object",
  "properties": {
    "limit": {
      "type": "number",
      "description": "Maximum entries to return; integer 1–25, default 10"
    },
    "commercialOnly": {
      "type": "boolean",
      "description": "Only include potential commercial-intent terms; default false"
    }
  },
  "required": [],
  "additionalProperties": false
}
🟢penny_capability_router(task)

Resolve an agent task to existing Penny Engine capabilities only. Does not execute, purchase, research live web content, or claim to handle arbitrary tasks. Unsupported requests are labeled explicitly. Free, no signup.

入力スキーマ

{
  "type": "object",
  "properties": {
    "task": {
      "type": "string",
      "minLength": 3,
      "maxLength": 180
    }
  },
  "required": [
    "task"
  ],
  "additionalProperties": false
}
🟢penny_fulfillment_preflight(goal, input, maxPriceUsd)

FREE preflight for a catalog audit or agent-output-batch-qa work order, with $0.001 Base USDC checkout instructions. Never charges, signs, or executes the paid call.

入力スキーマ

{
  "type": "object",
  "properties": {
    "goal": {
      "type": "string",
      "enum": [
        "catalog-csv-audit",
        "agent-output-batch-qa"
      ]
    },
    "input": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "csv": {
          "type": "string",
          "minLength": 15,
          "maxLength": 9500
        },
        "targetMarginPct": {
          "type": "number",
          "minimum": 0,
          "maximum": 95
        },
        "jobs": {
          "type": "array",
          "minItems": 1,
          "maxItems": 20,
          "items": {
            "type": "object",
            "properties": {
              "id": {
                "type": "string"
              },
              "result": {},
              "expectations": {
                "type": "object"
              }
            },
            "required": [
              "id",
              "result",
              "expectations"
            ]
          }
        }
      }
    },
    "maxPriceUsd": {
      "type": "number",
      "minimum": 0.001
    }
  },
  "required": [
    "goal",
    "input"
  ],
  "additionalProperties": false
}
🟢penny_choose_service(task, maxPriceUsd, input)

Given an agent's real task, get the single best supported Penny Engine payable route, exact $0.001 quote, required input, sample, and buyer-authorized checkout instructions. Includes optional FREE CSV preflight; does not sign, pay or execute a paid call.

入力スキーマ

{
  "type": "object",
  "properties": {
    "task": {
      "type": "string",
      "minLength": 3,
      "maxLength": 180
    },
    "maxPriceUsd": {
      "type": "number",
      "minimum": 0
    },
    "input": {
      "type": "object",
      "description": "Optional catalog CSV input for free validation, or a public wallet address."
    }
  },
  "required": [
    "task"
  ],
  "additionalProperties": false
}

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