FabTally Utility Belt

REMOTE · BELT.FABTALLY.COM · SCANNED AUG 3

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

Available components

60 60 Trust /100

Trust breakdown (6 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →

Endpoint Security57

The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
Authorisation not fully verified: no authorisation is required to call this server, and 13 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail

Transport & Reachability100

Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass

Schema Quality & AI Usability58

AI-judged instruction clarity (good).Pass
Context-footprint check failed: tool/resource definitions use about 2618 tokens (~201/item across 13 items; 13 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
Usage-examples check failed: none of the tools include examples. See how to fix → Fail

Stability & Change Management7

Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial

Tool Coverage99

100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
97% of tool parameters carry a description.Partial

Capabilities100

Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass

Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

remote · belt.fabtally.com

Claude Codex opencode OpenClaw Hermes Other

# add to Claude Code

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

# ~/.codex/config.toml

[mcp_servers.zvmzaretsky-utility-belt]
url = "https://belt.fabtally.com/mcp"

// opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "zvmzaretsky-utility-belt": {
      "type": "remote",
      "url": "https://belt.fabtally.com/mcp",
      "enabled": true
    }
  }
}

# add to OpenClaw

openclaw mcp add zvmzaretsky-utility-belt --url https://belt.fabtally.com/mcp --transport streamable-http

# ~/.hermes/config.yaml

mcp_servers:
  zvmzaretsky-utility-belt:
    url: "https://belt.fabtally.com/mcp"

// mcp.json

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

2 Aug 26 +1
- Stability: unverified → 0.03 ▲ functional
1 Aug 26 59

First indexed and scored.

Show 1 earlier entry Hide earlier entries

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 3 Aug 2026 · Probed https://belt.fabtally.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject	Issuer	Valid from	Valid until	Key	Signature	Serial
CN=belt.fabtally.com	CN=YR1,O=Let's Encrypt,C=US	31 Jul 2026	29 Oct 2026	RSA 2048	SHA256-RSA	5505e9586deeff102cf9794aef99ce6bfe5
SANs: belt.fabtally.com
CN=YR1,O=Let's Encrypt,C=US (CA)	CN=Root YR,O=ISRG,C=US	3 Sept 2025	2 Sept 2028	RSA 2048	SHA256-RSA	a20253f15f2691c05dc1ce13b9bcca4e
CN=Root YR,O=ISRG,C=US (CA)	CN=ISRG Root X1,O=Internet Security Research Group,C=US	13 May 2026	2 Sept 2032	RSA 4096	SHA256-RSA	f24b6d17f9d9ad7cb1c9fea78782699f

DNSSEC insecure

Validation of belt.fabtally.com. — Not signed

Zone	DS	Keys	Algorithms	Outcome
.	trust_anchor	20326, 38696	8, 8	Verified
com.	present	19718	13	Verified
fabtally.com.	absent			Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation

Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result	No authorisation required
HTTP status	200

Transports 2 probes

Transport	URL	Outcome	Status	Location
streamable-http	https://belt.fabtally.com/mcp	Verified	200
http (plaintext)	http://belt.fabtally.com/mcp	HTTPS enforced	301	https://belt.fabtally.com/mcp

MCP tools — 13 exposed · ~2,618 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.

Tool Tokens

convert Unit conversion ~145

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.

Input Output Examples

Name	Type	Req	Description
from	string	yes	Source unit, e.g. c, km, GiB, gal, kg.
to	string	yes	Target unit in the same dimension.
value	number	yes	Numeric value to convert.

No output schema declared.

No examples provided.

cron Cron -> next N runs + description (paid $0.001) ~209

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.

Input Output Examples

Name	Type	Req	Description
count	integer	—	How many upcoming runs (1-100, default 5).
expression	string	yes	Cron expression, e.g. '0 9 * * 1-5'.
from	string	—	Compute runs after this ISO datetime (default now).
timezone	string	—	IANA timezone (default UTC).
x_payment	string	—	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…

No output schema declared.

No examples provided.

currency Live currency convert (paid $0.001) ~194

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.

Input Output Examples

Name	Type	Req	Description
amount	number	yes	Amount in the source currency.
from	string	yes	Source ISO-4217 code, e.g. USD.
to	string	yes	Target ISO-4217 code, e.g. EUR.
x_payment	string	—	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…

No output schema declared.

No examples provided.

datemath Date math: durations & business days (paid $0.001) ~333

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.

Input Output Examples

Name	Type	Req	Description
date	string	—	Base date for add/subtract/business-add (ISO 8601).
days	integer	—	Business days to add (business-add; may be negative).
duration	—	—	ISO-8601 duration string or object for add/subtract.
from	string	—	Start datetime for diff/business-diff.
holidays	array	—	ISO dates to skip as holidays.
op	string	yes	add \| subtract \| diff \| business-add \| business-diff
timezone	string	—	IANA zone for parsing/rendering.
to	string	—	End datetime for diff/business-diff.
units	—	—	diff units, e.g. ['days','hours'].
weekend	array	—	Weekend weekdays (1=Mon..7=Sun; default [6,7]).
x_payment	string	—	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…

No output schema declared.

No examples provided.

diff Text diff (unified + structured) (paid $0.001) ~209

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.

Input Output Examples

Name	Type	Req	Description
a	string	yes	Original text.
b	string	yes	Changed text.
context	integer	—	Unified-diff context lines (default 3).
label_a	string	—	—
label_b	string	—	—
mode	string	—	lines (default) \| words \| chars.
x_payment	string	—	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…

No output schema declared.

No examples provided.

encode Encode / decode (base64, hex, url, html) ~134

Input Output Examples

Name	Type	Req	Description
op	string	yes	base64-encode\|base64-decode\|base64url-encode\|base64url-decode\|hex-encode\|hex-decode\|url-encode\|url-decode\|html-encode\|html-decode
text	string	yes	Text to encode/decode.

No output schema declared.

No examples provided.

hash Hash / HMAC ~227

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).

Input Output Examples

Name	Type	Req	Description
algorithm	string	yes	sha256 \| sha512 \| sha384 \| sha1 \| md5 \| sha3-256 \| keccak256 \| ripemd160
hmac_key	string	—	If set, compute HMAC with this key (not for keccak256/sha3-256).
input_encoding	string	—	How `text` is encoded: utf8 (default) \| hex \| base64 \| base64url.
output_encoding	string	—	Digest encoding: hex (default) \| base64 \| base64url.
text	string	yes	Input to hash.

No output schema declared.

No examples provided.

id Generate IDs (uuid v4/v7, ULID, nanoid) ~154

Input Output Examples

Name	Type	Req	Description
bytes	integer	—	hex/base64url random byte length (default 16).
count	integer	—	How many to generate (1-1000, default 1).
kind	string	—	uuidv4 (default) \| uuidv7 \| ulid \| nanoid \| hex \| base64url \| int
size	integer	—	nanoid length (default 21).

No output schema declared.

No examples provided.

jsonschema JSON-Schema (2020-12) validate + explain (paid $0.001) ~165

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.

Input Output Examples

Name	Type	Req	Description
data	—	—	The value to validate against the schema.
schema	object	yes	A JSON Schema (draft 2020-12) object.
x_payment	string	—	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…

No output schema declared.

No examples provided.

regex Regex test / match / extract / replace (safe) ~182

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).

Input Output Examples

Name	Type	Req	Description
flags	string	—	Any of g,i,m,s,u,y.
input	string	yes	The text to run it against (max 200k chars).
limit	integer	—	Max matches for global ops (default 1000).
op	string	—	test \| match \| extract (capture groups) \| replace. Default match.
pattern	string	yes	The regular expression source (max 2000 chars).
replacement	string	—	Replacement string for op='replace' (supports $1 etc.).

No output schema declared.

No examples provided.

rrule iCal RRULE -> next N occurrences (paid $0.001) ~222

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.

Input Output Examples

Name	Type	Req	Description
after	string	—	Return occurrences after this ISO datetime (default now).
count	integer	—	How many occurrences (1-366, default 5).
rrule	string	yes	RRULE string, optionally with a DTSTART line.
timezone	string	—	Render occurrences in this IANA zone.
x_payment	string	—	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…

No output schema declared.

No examples provided.

text Slugify / case-convert / template-fill ~194

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).

Input Output Examples

Name	Type	Req	Description
data	object	—	Object of values for op='template'.
op	string	yes	slugify \| template \| camel \| pascal \| snake \| kebab \| constant \| dot \| path \| title \| sentence \| upper \| lower
separator	string	—	Slug separator (default '-').
strict	boolean	—	template: throw on missing keys.
template	string	—	Template string for op='template', with {{key}} placeholders.
text	string	—	Input text for slugify/case ops.

No output schema declared.

No examples provided.

timezone Timezone / DST convert (paid $0.001) ~250

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.

Input Output Examples

Name	Type	Req	Description
datetime	string\|number	yes	Instant to convert: ISO 8601 (e.g. 2021-03-14T01:30:00) or epoch seconds/millis.
from_zone	string	—	Source IANA zone (default UTC), e.g. America/New_York.
to_zone	string	yes	Target IANA zone, e.g. Europe/London, Asia/Tokyo.
x_payment	string	—	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…

No output schema declared.

No examples provided.

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Scoring key

80+ high trust
60–79 medium
below 60 low

How we score

Score history · last 30 days

1 Aug 3 Aug