MCP MeasureMCP Measure

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Fallback

Tiny paid recovery and decision utilities for autonomous agents.

사용해야 할까요

품질 및 안전성

A
설명 품질
100%
스키마 완전성
74%
이름 품질
90%
오염 위험
100%
권한 일치
100%
프로토콜 준수
100%

도구 정의와 프로토콜 준수에 대한 자동 분석을 기반으로 합니다.

컨텍스트 비용

~1,882토큰 (도구 정의)
~4.3 KB일반적인 응답 크기
중간 정도의 주의 영향 (128k 컨텍스트의 1.47%)

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설치

원클릭 설치

`claude_desktop_config.json` 파일에 다음을 추가하세요:

{
  "mcpServers": {
    "fallback-agent-tools": {
      "url": "https://fallback.factrail.online/mcp"
    }
  }
}

원격 엔드포인트

https://fallback.factrail.online/mcpstreamable-http

할 수 있는 일

도구 목록

도구 (4)

🟢 읽기 전용🟡 쓰기🔴 삭제⚪ 알 수 없음
🟢source_route(goal, domain, start_url, preferred_formats, require_official, ...)

Find likely authoritative or machine-readable sources when you know what information you need but not where to retrieve it. Provide a goal and optional publisher domain or start URL; it returns ranked candidate routes and bounded evidence. Use it before blind searching. Do not use it when you already have the correct source or only need reasoning over supplied context. Price: $0.02 USD per call via x402.

입력 스키마

{
  "type": "object",
  "properties": {
    "goal": {
      "type": "string",
      "minLength": 3,
      "maxLength": 500
    },
    "domain": {
      "type": "string",
      "maxLength": 253,
      "format": "hostname",
      "pattern": "^(?=.{1,253}\\.?$)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[-0-9a-zA-Z]{0,61}[0-9a-zA-Z])?)*\\.?$"
    },
    "start_url": {
      "type": "string",
      "maxLength": 2048
    },
    "preferred_formats": {
      "maxItems": 7,
      "type": "array",
      "items": {
        "type": "string",
        "enum": [
          "json",
          "csv",
          "xml",
          "rss",
          "api",
          "bulk_download",
          "html"
        ]
      }
    },
    "require_official": {
      "default": false,
      "type": "boolean"
    },
    "max_candidates": {
      "default": 5,
      "type": "integer",
      "minimum": 1,
      "maximum": 10
    }
  },
  "required": [
    "goal"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false
}
⚪error_route(goal, request, response, error, attempt)

Diagnose a failed API, HTTP, MCP, or tool request and return a bounded safe next action. Use it after a request fails when the safe next step is unclear. Provide a status, response, or error text; it does not execute requests or verify undocumented fixes. Price: $0.002 USD per call via x402.

입력 스키마

{
  "type": "object",
  "properties": {
    "goal": {
      "type": "string",
      "minLength": 1,
      "maxLength": 500
    },
    "request": {
      "type": "object",
      "properties": {
        "method": {
          "type": "string",
          "maxLength": 16
        },
        "url": {
          "type": "string",
          "maxLength": 2048
        },
        "headers": {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "type": "string",
            "maxLength": 2048
          }
        },
        "body": {}
      },
      "additionalProperties": false
    },
    "response": {
      "type": "object",
      "properties": {
        "status": {
          "type": "integer",
          "minimum": 100,
          "maximum": 599
        },
        "headers": {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "type": "string",
            "maxLength": 2048
          }
        },
        "body": {
          "type": "string",
          "maxLength": 8192
        }
      },
      "additionalProperties": false
    },
    "error": {
      "type": "string",
      "maxLength": 2048
    },
    "attempt": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false
}
⚪request_repair(goal, request, response, error, error_route, ...)

Repair a failed API or HTTP request using only supplied schema and error evidence. Use after error_route identifies a request-shape or input problem. Returns the smallest justified request changes and abstains when evidence is insufficient. Price: $0.005 USD per call via x402.

입력 스키마

{
  "type": "object",
  "properties": {
    "goal": {
      "type": "string",
      "minLength": 1,
      "maxLength": 500
    },
    "request": {
      "type": "object",
      "properties": {
        "method": {
          "type": "string",
          "minLength": 1,
          "maxLength": 16
        },
        "url": {
          "type": "string",
          "maxLength": 2048
        },
        "headers": {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "type": "string",
            "maxLength": 4096
          }
        },
        "query": {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "$ref": "#/$defs/__schema0"
          }
        },
        "body": {
          "$ref": "#/$defs/__schema0"
        }
      },
      "additionalProperties": false
    },
    "response": {
      "type": "object",
      "properties": {
        "status": {
          "type": "integer",
          "minimum": 100,
          "maximum": 599
        },
        "headers": {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "type": "string",
            "maxLength": 4096
          }
        },
        "body": {
          "$ref": "#/$defs/__schema0"
        }
      },
      "additionalProperties": false
    },
    "error": {
      "type": "string",
      "maxLength": 4000
    },
    "error_route": {
      "type": "object",
      "properties": {
        "classification": {
          "type": "string",
          "enum": [
            "authentication_required",
            "authorization_denied",
            "rate_limited",
            "quota_exhausted",
            "payment_required",
            "payment_failed",
            "schema_mismatch",
            "invalid_input",
            "not_found",
            "method_not_allowed",
            "unsupported_media_type",
            "timeout",
            "connection_failure",
            "dns_failure",
            "tls_failure",
            "upstream_failure",
            "service_unavailable",
            "conflict",
            "stale_state",
            "malformed_response",
            "blocked_or_challenged",
            "unknown"
          ]
        },
        "retry": {
          "type": "string",
          "enum": [
            "never",
            "immediate",
            "after_delay",
            "after_change",
            "after_auth",
            "after_payment",
            "unknown"
          ]
        }
      },
      "required": [
        "classification"
      ],
      "additionalProperties": {}
    },
    "schema": {
      "$ref": "#/$defs/__schema0"
    },
    "constraints": {
      "default": {
        "allow_method_change": false,
        "allow_url_change": false
      },
      "type": "object",
      "properties": {
        "allow_method_change": {
          "default": false,
          "type": "boolean"
        },
        "allow_url_change": {
          "default": false,
          "type": "boolean"
        }
      },
      "additionalProperties": false
    }
  },
  "required": [
    "request"
  ],
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "$defs": {
    "__schema0": {
      "anyOf": [
        {
          "type": "string",
          "maxLength": 8192
        },
        {
          "type": "number"
        },
        {
          "type": "boolean"
        },
        {
          "type": "null"
        },
        {
          "maxItems": 256,
          "type": "array",
          "items": {
            "$ref": "#/$defs/__schema0"
          }
        },
        {
          "type": "object",
          "propertyNames": {
            "type": "string",
            "maxLength": 128
          },
          "additionalProperties": {
            "$ref": "#/$defs/__schema0"
          }
        }
      ]
    }
  }
}
🟢stop_search(goal, checks, remaining_routes, search_budget, risk)

Decide whether another search or paid retrieval is worth the cost based on the scope already checked. Use after several search or source checks when you need to decide whether to continue or return a scoped not-found result. It does not prove universal absence and performs no searches itself. Price: $0.003 USD per call via x402.

입력 스키마

{
  "type": "object",
  "properties": {
    "goal": {
      "type": "string",
      "minLength": 1,
      "maxLength": 500
    },
    "checks": {
      "default": [],
      "maxItems": 40,
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "target": {
            "type": "string",
            "minLength": 1,
            "maxLength": 300
          },
          "method": {
            "type": "string",
            "enum": [
              "direct",
              "search",
              "documentation",
              "api_catalog",
              "registry",
              "browser",
              "other"
            ]
          },
          "result": {
            "type": "string",
            "enum": [
              "found",
              "not_found",
              "inconclusive",
              "error",
              "blocked",
              "contradictory"
            ]
          },
          "authority": {
            "type": "string",
            "enum": [
              "primary",
              "official",
              "secondary",
              "general",
              "unknown"
            ]
          },
          "coverage": {
            "type": "string",
            "enum": [
              "low",
              "medium",
              "high"
            ]
          },
          "exhaustive": {
            "default": false,
            "type": "boolean"
          },
          "checked_at": {
            "type": "string",
            "format": "date-time",
            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$"
          }
        },
        "required": [
          "target",
          "method",
          "result",
          "authority",
          "coverage"
        ],
        "additionalProperties": false
      }
    },
    "remaining_routes": {
      "default": [],
      "maxItems": 20,
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "route": {
            "type": "string",
            "minLength": 1,
            "maxLength": 300
          },
          "expected_value": {
            "anyOf": [
              {
                "type": "string",
                "enum": [
                  "low",
                  "medium",
                  "high"
                ]
              },
              {
                "type": "string",
                "const": "unknown"
              }
            ]
          },
          "estimated_cost_usd": {
            "type": "number",
            "minimum": 0,
            "maximum": 10000
          }
        },
        "required": [
          "route",
          "expected_value"
        ],
        "additionalProperties": false
      }
    },
    "search_budget": {
      "type": "object",
      "properties": {
        "calls_used": {
          "type": "integer",
          "minimum": 0,
          "maximum": 10000
        },
        "calls_remaining": {
          "type": "integer",
          "minimum": 0,
          "maximum": 10000
        },
        "cost_used_usd": {
          "type": "number",
          "minimum": 0,
          "maximum": 10000
        },
        "cost_remaining_usd": {
          "type": "number",
          "minimum": 0,
          "maximum": 10000
        }
      },
      "additionalProperties": false
    },
    "risk": {
      "default": "medium",
      "type": "string",
      "enum": [
        "low",
        "medium",
        "high"
      ]
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false
}

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