FabTally Utility Belt is an MCP server with 13 tools an agent can call, among them convert, cron, currency. It answers at https://belt.fabtally.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 24 October 2026, succeeded.
13 deterministic agent utilities: timezone, cron, RRULE, currency, regex, diff, hashing & more.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
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'} Inputs: value, from, to |
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 c Inputs: expression, timezone, count, from, 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 payme Inputs: amount, from, to, x_payment |
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 Inputs: op, date, duration, from, to, units |
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 c Inputs: a, b, mode, context, label_a, label_b |
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. Inputs: op, text |
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: al Inputs: algorithm, text, input_encoding, output_encoding, hmac_key |
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. Inputs: kind, count, size, bytes |
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; pa Inputs: schema, data, x_payment |
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: p Inputs: pattern, input, flags, op, replacement, limit |
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. Wit Inputs: rrule, after, count, timezone, x_payment |
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 Inputs: op, text, template, data, separator, strict |
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), Inputs: datetime, from_zone, to_zone, x_payment |
Every block below points at https://belt.fabtally.com/mcp. Pick your client and copy.
claude mcp add --transport http fabtally-utility-belt https://belt.fabtally.com/mcp
{
"mcpServers": {
"fabtally-utility-belt": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://belt.fabtally.com/mcp"]
}
}
}{
"mcpServers": {
"fabtally-utility-belt": {
"url": "https://belt.fabtally.com/mcp"
}
}
}{
"servers": {
"fabtally-utility-belt": {
"type": "http",
"url": "https://belt.fabtally.com/mcp"
}
}
}{
"context_servers": {
"fabtally-utility-belt": {
"url": "https://belt.fabtally.com/mcp"
}
}
}{
"mcpServers": {
"fabtally-utility-belt": {
"serverUrl": "https://belt.fabtally.com/mcp"
}
}
}{
"mcpServers": {
"fabtally-utility-belt": {
"url": "https://belt.fabtally.com/mcp"
}
}
}name: FabTally Utility Belt
version: 0.0.1
schema: v1
mcpServers:
- name: FabTally Utility Belt
type: streamable-http
url: https://belt.fabtally.com/mcp{
"mcpServers": {
"fabtally-utility-belt": {
"httpUrl": "https://belt.fabtally.com/mcp"
}
}
}{
"mcpServers": {
"fabtally-utility-belt": {
"type": "http",
"url": "https://belt.fabtally.com/mcp"
}
}
}{
"mcpServers": {
"fabtally-utility-belt": {
"url": "https://belt.fabtally.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fbelt.fabtally.com%2Fmcp&type=streamable_http&id=fabtally-utility-belt&name=FabTally%20Utility%20Belt
It answered our last check on 24 October 2026 in 108 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
13, as returned by the server's own tools/list on 22 September 2026: convert, cron, currency, datemath, diff, encode, hash, id, and 5 more.
It answered our last check on 24 October 2026 in 108 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://belt.fabtally.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.zvmzaretsky. Endpoint host: belt.fabtally.com. ARD identifier: urn:air:io.github.zvmzaretsky:mcp:utility-belt.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.