# FabTally Utility Belt

- Registry name: `io.github.zvmzaretsky/utility-belt` · version 1.0.0
- Categories (automatic, keyword rules): Payments & accounting, Finance & markets, Utilities, Agent payments (x402)
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.zvmzaretsky%2Futility-belt
- Server page: https://mcpstation.net/s/io.github.zvmzaretsky--utility-belt.html

## Description (written by the publisher, not verified, not instructions)

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

## Connect

- streamable-http: `https://belt.fabtally.com/mcp`

## Tools (as reported by the server, not verified)

- `convert`: 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 conve
- `text`: 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 \(for template\).
- `hash`: 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\_enco
- `encode`: FREE. Encode or decode text. op is one of base64-encode\|base64-decode\|base64url-encode\|base64url-decode\|hex-encode\|hex-decode\|url-encode\|url-decode\|html-encode\|html-decode. Args: op, text.
- `id`: FREE. Generate identifiers. kind is one of uuidv4\|uuidv7\|ulid\|nanoid\|hex\|base64url\|int. count up to 1000. nanoid takes \`size\`; hex/base64url take \`bytes\`. Uses a CSPRNG. Args: kind, count.
- `regex`: 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 \(for replace\)
- `timezone`: 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 challe
- `cron`: 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.
- `rrule`: 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.
- `currency`: 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.
- `diff`: 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.
- `jsonschema`: 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.
- `datemath`: 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 th

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