FabTally Utility Belt

13 deterministic agent utilities: timezone, cron, RRULE, currency, regex, diff, hashing & more.

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Calidad de la descripción

94%

Integridad del esquema

98%

Calidad de los nombres

80%

Riesgo de envenenamiento

80%

Coincidencia de permisos

100%

Cumplimiento del protocolo

100%

Hallazgos (6)

HIGHTool poisoning patterns detected
MEDIUMTool 'text' description contains placeholder texten text
LOWTool 'text' description lacks action verben text
LOWTool 'encode' description lacks action verben encode
LOWTool 'id' name length outside 3-30 rangeen id
INFOTool description contains placeholder or incomplete texten text

Basado en el análisis automatizado de las definiciones de herramientas y el cumplimiento del protocolo.

Costo de contexto

~3,374Tokens (definiciones de herramientas)

~2.0 KBTamaño de respuesta típico

Impacto significativo en la atención (2.64% del contexto de 128k)

Este es el número aproximado de tokens que se consumen cada vez que las herramientas del servidor se cargan en el contexto de un modelo. Los recuentos más altos reducen la atención disponible para otras tareas.

Instalar

Instalación con un clic

Agrega esto a tu archivo `claude_desktop_config.json`:

{
  "mcpServers": {
    "utility-belt": {
      "url": "https://belt.fabtally.com/mcp"
    }
  }
}

Puntos de conexión remotos

https://belt.fabtally.com/mcpstreamable-http

Qué puede hacer

Inventario de herramientas

FREE. Convert a value between units in the same dimension: length, mass, temperature, volume, data, time, area, speed, angle, pressure, energy. Deterministic. Args: value (number), from (unit), to (unit). e.g. {value:100, from:'c', to:'f'} or {value:1, from:'GiB', to:'MB'}. Different-dimension conversions 400.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "value": {
      "type": "number",
      "description": "Numeric value to convert."
    },
    "from": {
      "type": "string",
      "description": "Source unit, e.g. c, km, GiB, gal, kg."
    },
    "to": {
      "type": "string",
      "description": "Target unit in the same dimension."
    }
  },
  "required": [
    "value",
    "from",
    "to"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

FREE. Text transforms. op='slugify' -> URL slug; op is one of camel|pascal|snake|kebab|constant|dot|path|title|sentence|upper|lower for case conversion; op='template' fills {{placeholders}} from `data`. Args: op, text (for slugify/case), or template + data (for template).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "op": {
      "type": "string",
      "description": "slugify | template | camel | pascal | snake | kebab | constant | dot | path | title | sentence | upper | lower"
    },
    "text": {
      "type": "string",
      "description": "Input text for slugify/case ops."
    },
    "template": {
      "type": "string",
      "description": "Template string for op='template', with {{key}} placeholders."
    },
    "data": {
      "type": "object",
      "additionalProperties": {},
      "description": "Object of values for op='template'."
    },
    "separator": {
      "type": "string",
      "description": "Slug separator (default '-')."
    },
    "strict": {
      "type": "boolean",
      "description": "template: throw on missing keys."
    }
  },
  "required": [
    "op"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

FREE. Compute a cryptographic digest: sha256, sha512, sha384, sha1, md5, sha3-256, keccak256, ripemd160. Optional HMAC via hmac_key. Output hex (default), base64, or base64url. keccak256 also returns a 0x-form (handy for Ethereum). Args: algorithm, text (+ input_encoding utf8|hex|base64, output_encoding, hmac_key).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "algorithm": {
      "type": "string",
      "description": "sha256 | sha512 | sha384 | sha1 | md5 | sha3-256 | keccak256 | ripemd160"
    },
    "text": {
      "type": "string",
      "description": "Input to hash."
    },
    "input_encoding": {
      "type": "string",
      "description": "How `text` is encoded: utf8 (default) | hex | base64 | base64url."
    },
    "output_encoding": {
      "type": "string",
      "description": "Digest encoding: hex (default) | base64 | base64url."
    },
    "hmac_key": {
      "type": "string",
      "description": "If set, compute HMAC with this key (not for keccak256/sha3-256)."
    }
  },
  "required": [
    "algorithm",
    "text"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Esquema de entrada

{
  "type": "object",
  "properties": {
    "op": {
      "type": "string",
      "description": "base64-encode|base64-decode|base64url-encode|base64url-decode|hex-encode|hex-decode|url-encode|url-decode|html-encode|html-decode"
    },
    "text": {
      "type": "string",
      "description": "Text to encode/decode."
    }
  },
  "required": [
    "op",
    "text"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Esquema de entrada

{
  "type": "object",
  "properties": {
    "kind": {
      "type": "string",
      "description": "uuidv4 (default) | uuidv7 | ulid | nanoid | hex | base64url | int"
    },
    "count": {
      "type": "integer",
      "description": "How many to generate (1-1000, default 1)."
    },
    "size": {
      "type": "integer",
      "description": "nanoid length (default 21)."
    },
    "bytes": {
      "type": "integer",
      "description": "hex/base64url random byte length (default 16)."
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

FREE. Run a regular expression against input with catastrophic-backtracking protection (it runs in a killable worker with a hard timeout, so a pathological pattern returns a 400 instead of hanging). op is test|match|extract|replace. Args: pattern, input, flags (gimsuy), op, replacement (for replace).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "pattern": {
      "type": "string",
      "description": "The regular expression source (max 2000 chars)."
    },
    "input": {
      "type": "string",
      "description": "The text to run it against (max 200k chars)."
    },
    "flags": {
      "type": "string",
      "description": "Any of g,i,m,s,u,y."
    },
    "op": {
      "type": "string",
      "description": "test | match | extract (capture groups) | replace. Default match."
    },
    "replacement": {
      "type": "string",
      "description": "Replacement string for op='replace' (supports $1 etc.)."
    },
    "limit": {
      "type": "integer",
      "description": "Max matches for global ops (default 1000)."
    }
  },
  "required": [
    "pattern",
    "input"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001 (x402, USDC on Base). Convert an instant between IANA time zones with historically-correct DST. Returns converted datetime, UTC offsets, tz abbreviations, DST flags, and the offset difference. Args: datetime (ISO 8601 or epoch), from_zone, to_zone. Without payment returns the x402 challenge; pass x_payment to settle. Free teaser exists on the HTTP API at /v1/timezone/free.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "datetime": {
      "type": [
        "string",
        "number"
      ],
      "description": "Instant to convert: ISO 8601 (e.g. 2021-03-14T01:30:00) or epoch seconds/millis."
    },
    "from_zone": {
      "type": "string",
      "description": "Source IANA zone (default UTC), e.g. America/New_York."
    },
    "to_zone": {
      "type": "string",
      "description": "Target IANA zone, e.g. Europe/London, Asia/Tokyo."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "datetime",
    "to_zone"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Parse a 5- or 6-field cron expression and return the next N run times plus a plain-English description. Args: expression, timezone (IANA, default UTC), count (default 5), from (ISO, optional). Without payment returns the x402 challenge; pass x_payment to settle.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "expression": {
      "type": "string",
      "description": "Cron expression, e.g. '0 9 * * 1-5'."
    },
    "timezone": {
      "type": "string",
      "description": "IANA timezone (default UTC)."
    },
    "count": {
      "type": "integer",
      "description": "How many upcoming runs (1-100, default 5)."
    },
    "from": {
      "type": "string",
      "description": "Compute runs after this ISO datetime (default now)."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "expression"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Expand an iCal RRULE (RFC 5545) recurrence into its next N occurrences. Args: rrule (e.g. 'FREQ=WEEKLY;BYDAY=MO,WE;COUNT=10'), after (ISO, default now), count (default 5), timezone. Tip: include DTSTART for anchored series. Without payment returns the x402 challenge; pass x_payment.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "rrule": {
      "type": "string",
      "description": "RRULE string, optionally with a DTSTART line."
    },
    "after": {
      "type": "string",
      "description": "Return occurrences after this ISO datetime (default now)."
    },
    "count": {
      "type": "integer",
      "description": "How many occurrences (1-366, default 5)."
    },
    "timezone": {
      "type": "string",
      "description": "Render occurrences in this IANA zone."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "rrule"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Convert an amount between currencies at reference/mid-market rates from a keyless public central-bank feed (ECB), cached. Informational, not a dealable quote. Args: amount, from, to (ISO-4217, e.g. USD, EUR, JPY). Without payment returns the x402 challenge; pass x_payment to settle.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "amount": {
      "type": "number",
      "description": "Amount in the source currency."
    },
    "from": {
      "type": "string",
      "description": "Source ISO-4217 code, e.g. USD."
    },
    "to": {
      "type": "string",
      "description": "Target ISO-4217 code, e.g. EUR."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "amount",
    "from",
    "to"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Diff two texts: a unified patch, a structured op-list (add/remove/equal), and add/remove/hunk stats. Args: a, b, mode (lines|words|chars, default lines), context (default 3), label_a, label_b. Without payment returns the x402 challenge; pass x_payment to settle.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "a": {
      "type": "string",
      "description": "Original text."
    },
    "b": {
      "type": "string",
      "description": "Changed text."
    },
    "mode": {
      "type": "string",
      "description": "lines (default) | words | chars."
    },
    "context": {
      "type": "integer",
      "description": "Unified-diff context lines (default 3)."
    },
    "label_a": {
      "type": "string"
    },
    "label_b": {
      "type": "string"
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "a",
    "b"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Validate a value against a JSON Schema (draft 2020-12) and explain every error in plain English (which property, what was wrong, allowed values). Args: schema (object), data (any). Without payment returns the x402 challenge; pass x_payment to settle.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "schema": {
      "type": "object",
      "additionalProperties": {},
      "description": "A JSON Schema (draft 2020-12) object."
    },
    "data": {
      "description": "The value to validate against the schema."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "schema"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

PAID $0.001. Calendar date math. op='add'/'subtract' an ISO-8601 duration (P1Y2M10DT2H30M) to a date; op='diff' two datetimes into chosen units; op='business-add' add business days (configurable weekend + holidays); op='business-diff' count business days between two dates. Without payment returns the x402 challenge; pass x_payment to settle.

Esquema de entrada

{
  "type": "object",
  "properties": {
    "op": {
      "type": "string",
      "description": "add | subtract | diff | business-add | business-diff"
    },
    "date": {
      "type": "string",
      "description": "Base date for add/subtract/business-add (ISO 8601)."
    },
    "duration": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "object",
          "additionalProperties": {}
        }
      ],
      "description": "ISO-8601 duration string or object for add/subtract."
    },
    "from": {
      "type": "string",
      "description": "Start datetime for diff/business-diff."
    },
    "to": {
      "type": "string",
      "description": "End datetime for diff/business-diff."
    },
    "units": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      ],
      "description": "diff units, e.g. ['days','hours']."
    },
    "days": {
      "type": "integer",
      "description": "Business days to add (business-add; may be negative)."
    },
    "holidays": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "ISO dates to skip as holidays."
    },
    "weekend": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Weekend weekdays (1=Mon..7=Sun; default [6,7])."
    },
    "timezone": {
      "type": "string",
      "description": "IANA zone for parsing/rendering."
    },
    "x_payment": {
      "type": "string",
      "description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
    }
  },
  "required": [
    "op"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Comunidad

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Evidencia

Observaciones recientes

26 sept 2026, 6:02 UTCverificadoversión no registrada13 herramientas

19 sept 2026, 5:02 UTCverificadoversión no registrada13 herramientas

FabTally Utility Belt

Calidad y seguridad

Hallazgos (6)

Costo de contexto

Instalación con un clic

Puntos de conexión remotos

Inventario de herramientas

Herramientas (13)

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