MCP MeasureMCP Measure

索引已觀測

Hash Encoding Direct Credits

Deterministic SHA, HMAC, Base64 and JWT decode tools with prepaid direct-USDC API credits on Base.

我該用這個嗎

品質與安全性

A
說明品質
90%
結構描述完整度
83%
命名品質
85%
汙染風險
100%
權限相符程度
100%
協定合規性
100%

發現項目（2）

  • LOWTool 'base64_encode' description lacks action verb在 base64_encode 中
  • LOWTool 'base64_decode' description lacks action verb在 base64_decode 中

根據工具定義與協定合規性的自動化分析。

上下文成本

~3,278Token（工具定義）
~3.8 KB典型回應大小
顯著的注意力影響（128k 上下文的 2.56%）

這是每次將伺服器的工具載入模型上下文時所消耗的約略 token 數量。數量越高，可用於其他工作的注意力就越少。

安裝

一鍵安裝

將以下內容加入你的 `claude_desktop_config.json` 檔案：

{
  "mcpServers": {
    "hash-encoding-direct-credits": {
      "url": "https://hash-encoding-001d.qqqa16521-dce.workers.dev/mcp"
    }
  }
}

遠端端點

https://hash-encoding-001d.qqqa16521-dce.workers.dev/mcpstreamable-http

它能做什麼

工具清單

工具（8）

🟢 唯讀🟡 寫入🔴 刪除⚪ 未知
🟢get_payment_info

Return the complete purchase and redemption instructions for this service's prepaid API credits. Use this before paying or when an agent needs the Base Mainnet network, native USDC contract, receiver address, exact package amount, credit quantity, buyer-gas requirement, or redemption steps. This call is free and does not require a bearer token. It does not return a balance; use get_credit_balance after you already have a redeemed bearer token. This payment scheme is direct USDC credits, not x402.

輸入結構描述

{
  "type": "object",
  "properties": {},
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "properties": {
    "scheme": {
      "type": "string",
      "description": "Payment scheme identifier: direct-usdc-credits-v1."
    },
    "network": {
      "type": "string",
      "description": "CAIP-2 network identifier for Base Mainnet."
    },
    "chainId": {
      "type": "integer",
      "minimum": -9007199254740991,
      "maximum": 9007199254740991,
      "description": "EVM chain ID for Base Mainnet."
    },
    "asset": {
      "type": "string",
      "description": "Native Circle USDC contract address on Base Mainnet."
    },
    "assetDecimals": {
      "type": "integer",
      "minimum": -9007199254740991,
      "maximum": 9007199254740991,
      "description": "USDC decimal precision."
    },
    "receiver": {
      "type": "string",
      "description": "Public wallet address that receives the exact USDC package payment."
    },
    "packages": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "amountAtomic": {
            "type": "string",
            "description": "Exact USDC amount in atomic 6-decimal units."
          },
          "credits": {
            "type": "integer",
            "exclusiveMinimum": 0,
            "maximum": 9007199254740991,
            "description": "Credits issued after successful redemption."
          }
        },
        "required": [
          "amountAtomic",
          "credits"
        ],
        "additionalProperties": false
      },
      "description": "Available prepaid credit packages."
    },
    "buyerPaysGas": {
      "type": "boolean",
      "description": "Whether the buyer pays the on-chain transaction gas."
    },
    "facilitatorRequired": {
      "type": "boolean",
      "description": "Whether a payment facilitator is required."
    },
    "x402Compatible": {
      "type": "boolean",
      "description": "Whether this direct-credit flow is x402-compatible."
    },
    "purchasePath": {
      "type": "string",
      "description": "Same-origin browser path for the self-service purchase and redemption flow."
    },
    "redeemFlow": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Ordered manual API steps required to redeem a qualifying payment into API credits."
    }
  },
  "required": [
    "scheme",
    "network",
    "chainId",
    "asset",
    "assetDecimals",
    "receiver",
    "packages",
    "buyerPaysGas",
    "facilitatorRequired",
    "x402Compatible",
    "purchasePath",
    "redeemFlow"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false
}
🟢get_credit_balance

Check the remaining prepaid API credits for the bearer token configured on this MCP connection. Use this after redeeming a payment when you need to decide whether a protected tool can be called. The bearer token is read from the Authorization header, not from tool arguments. This call is free, does not spend credits, and does not purchase or redeem credits.

輸入結構描述

{
  "type": "object",
  "properties": {},
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "credits": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Current number of remaining API credits."
        }
      },
      "required": [
        "credits"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Reason the balance could not be returned, such as a missing or invalid bearer token."
        }
      },
      "required": [
        "error"
      ],
      "additionalProperties": false
    }
  ]
}
🔴hash_sha256(input)

Create an unkeyed SHA-256 fingerprint of UTF-8 text. Use this for checksums, deduplication, content fingerprints, or integrity comparisons when no shared secret is involved; use hmac_sha256 instead when keyed authentication is required. Returns the 32-byte digest as 64 lowercase hexadecimal characters. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 65536,
      "description": "Text to hash, interpreted as UTF-8, maximum 65,536 characters."
    }
  },
  "required": [
    "input"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "sha256": {
          "type": "string",
          "pattern": "^[0-9a-f]{64}$",
          "description": "SHA-256 digest as 64 lowercase hexadecimal characters."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "sha256",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}
🔴hash_sha512(input)

Create an unkeyed SHA-512 fingerprint of UTF-8 text. Use this when a 512-bit digest is specifically required for checksums, fingerprints, or compatibility; use hash_sha256 for the more common 256-bit digest and hmac_sha256 when keyed authentication is required. Returns 128 lowercase hexadecimal characters. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 65536,
      "description": "Text to hash, interpreted as UTF-8, maximum 65,536 characters."
    }
  },
  "required": [
    "input"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "sha512": {
          "type": "string",
          "pattern": "^[0-9a-f]{128}$",
          "description": "SHA-512 digest as 128 lowercase hexadecimal characters."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "sha512",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}
🔴hmac_sha256(key, message)

Authenticate a UTF-8 message with a UTF-8 secret key using HMAC-SHA256. Use this when you need keyed integrity/authentication with a shared secret; use hash_sha256 instead for an unkeyed checksum or fingerprint. Returns the 32-byte HMAC as 64 lowercase hexadecimal characters. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "key": {
      "type": "string",
      "maxLength": 1024,
      "description": "Secret key interpreted as UTF-8 text, maximum 1,024 characters. Do not pass a hex/base64 key unless those literal characters are the intended key bytes."
    },
    "message": {
      "type": "string",
      "maxLength": 65536,
      "description": "Message interpreted as UTF-8 text, maximum 65,536 characters."
    }
  },
  "required": [
    "key",
    "message"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "hmacSha256": {
          "type": "string",
          "pattern": "^[0-9a-f]{64}$",
          "description": "HMAC-SHA256 digest encoded as 64 lowercase hexadecimal characters."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "hmacSha256",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}
🔴base64_encode(input)

Encode UTF-8 text as standard Base64. Use this for transport/storage encoding of text bytes; Base64 is reversible encoding, not encryption and not a cryptographic hash. Returns the encoded Base64 string. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 65536,
      "description": "Plain text interpreted as UTF-8, maximum 65,536 characters."
    }
  },
  "required": [
    "input"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "base64": {
          "type": "string",
          "description": "Standard Base64 representation of the UTF-8 input bytes."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "base64",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}
🔴base64_decode(input)

Decode a standard Base64 string into UTF-8 text. Use this only when the decoded bytes are expected to be valid UTF-8; this tool is not for arbitrary binary output. Base64 is reversible encoding, not encryption. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "maxLength": 65536,
      "description": "Standard Base64 text to decode, maximum 65,536 characters."
    }
  },
  "required": [
    "input"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "text": {
          "type": "string",
          "description": "Decoded UTF-8 text."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "text",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}
🔴jwt_decode(token)

Decode a compact JWT's header and payload for inspection without verifying its signature. Use this for debugging or reading claims only; never treat the returned claims as authenticated or trusted. The response always reports signatureVerified=false, even when a signature segment is present. Costs 1 credit.

輸入結構描述

{
  "type": "object",
  "properties": {
    "token": {
      "type": "string",
      "maxLength": 8192,
      "description": "Compact JWT string in header.payload.signature form, maximum 8,192 characters."
    }
  },
  "required": [
    "token"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema"
}

輸出結構描述

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "anyOf": [
    {
      "type": "object",
      "properties": {
        "header": {
          "description": "Decoded JWT header JSON value."
        },
        "payload": {
          "description": "Decoded JWT payload JSON value."
        },
        "signaturePresent": {
          "type": "boolean",
          "description": "Whether the compact JWT included a non-empty signature segment."
        },
        "signatureVerified": {
          "type": "boolean",
          "const": false,
          "description": "Always false: this tool does not verify JWT signatures."
        },
        "creditsRemaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991,
          "description": "Credits remaining after this successful 1-credit call."
        }
      },
      "required": [
        "header",
        "payload",
        "signaturePresent",
        "signatureVerified",
        "creditsRemaining"
      ],
      "additionalProperties": false
    },
    {
      "type": "object",
      "properties": {
        "error": {
          "type": "string",
          "description": "Human-readable reason the protected tool call failed."
        },
        "status": {
          "type": "integer",
          "minimum": -9007199254740991,
          "maximum": 9007199254740991,
          "description": "HTTP-style status code for the failure."
        },
        "creditsRemaining": {
          "anyOf": [
            {
              "type": "integer",
              "minimum": 0,
              "maximum": 9007199254740991
            },
            {
              "type": "null"
            }
          ],
          "description": "Known remaining credits, or null when no balance can be reported."
        }
      },
      "required": [
        "error",
        "status",
        "creditsRemaining"
      ],
      "additionalProperties": false
    }
  ]
}

社群

為此伺服器評分

證據

近期觀測

已驗證未記錄版本8 個工具