# Zvmzaretsky Utility Belt MCP server

Source: https://glimind.com/server/mcp-registry%2Fio.github.zvmzaretsky%2Futility-belt
Registry id: `mcp-registry/io.github.zvmzaretsky/utility-belt`
Status: live (checked 2026-10-26T22:34:19.356Z)

## Measurements (30 days)

- Uptime: 100%
- Checks: 4893
- Outages (90 days): 10

## Install

```json
{
  "mcpServers": {
    "zvmzaretsky-utility-belt-mcp-server": {
      "type": "http",
      "url": "https://belt.fabtally.com/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http zvmzaretsky-utility-belt-mcp-server https://belt.fabtally.com/mcp
```

## Tools (13)

- `convert`: FREE. Convert a value between units in the same dimension: length, mass, temperature, volume, data, time, area, speed, angle, pressure, energy. Deterministic. A
- `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 U
- `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 deal
- `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-ad
- `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 l
- `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|
- `hash`: FREE. Compute a cryptographic digest: sha256, sha512, sha384, sha1, md5, sha3-256, keccak256, ripemd160. Optional HMAC via hmac_key. Output hex (default), base6
- `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 
- `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). A
- `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 patt
- `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 
- `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='tem
- `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 abbrevia

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.