Plumbkit

Name: Plumbkit
Author: dev.plumbkit

MCP serverMCP

Exact utilities for agents: time zones, date math, business days, calculator, units, validation.

by dev.plumbkithomepage ↗v1.0.0

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Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability53/53 checks ok

when	check	result	http	latency	detail
2 h ago	mcp initialize	ok	200	66 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
10 h ago	mcp initialize	ok	200	18 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
17 h ago	mcp initialize	ok	200	8 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
25 h ago	mcp initialize	ok	200	49 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
33 h ago	mcp initialize	ok	200	37 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
2 d ago	mcp initialize	ok	200	33 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
2 d ago	mcp initialize	ok	200	68 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
2 d ago	mcp initialize	ok	200	62 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
3 d ago	mcp initialize	ok	200	43 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools
3 d ago	mcp initialize	ok	200	77 ms	server plumbkit 1.0.0 · protocol 2025-06-18 · 16 tools

Tools observed via MCP handshake

current_time — Returns the exact current date, time, weekday and UTC offset in any time zone. Use this whenever you need to know today's date or the current time instead of gu
convert_timezone — Converts a date/time from one time zone to another, correctly handling daylight saving time. If the input already includes an offset or 'Z', from_timezone is ig
date_add — Adds or subtracts a duration (years, months, weeks, days, hours, minutes, seconds) to a date/time. Use negative numbers to subtract. Calendar-aware: adding 1 mo
date_diff — Calculates the exact time between two dates/times: a calendar breakdown (years, months, days, hours, minutes, seconds) plus totals in days, hours, minutes and s
business_days — Works with business (working) days. mode "add": returns the date N business days after start_date (start_date itself is not counted; negative N goes backward; 0
calculate — Evaluates an arithmetic expression exactly, so you don't have to do mental math. Supports + - * / % ^ (or **), parentheses, constants pi/e/tau and functions: sq
convert_units — Converts a value between units of length, mass, volume (US and imperial), area, speed, time, digital data (KB vs KiB, bits vs bytes), energy, pressure and tempe
text_stats — Counts exactly what language models are bad at counting: characters (as humans see them), words, lines, sentences, paragraphs, UTF-8 bytes, and occurrences of a
hash_text — Computes a cryptographic hash (SHA-1, SHA-256, SHA-384, SHA-512) of text, or encodes/decodes it as Base64, Base64URL, hex or URL-encoding. Text is treated as UT
regex_test — Runs a JavaScript regular expression against text and returns every match with its position and capture groups, or the text after replacement. Use it to verify
validate_email — Checks whether an email address is correctly formatted and returns a normalized version. Set check_dns=true to also confirm the domain exists and can receive ma
validate_phone — Validates a phone number using Google's libphonenumber rules and returns it in E.164 (+14155552671), international and national formats, plus the country and li
validate_url — Checks that a URL is well-formed, normalizes it (lowercase host, punycode, default ports removed, spaces encoded) and splits it into parts including each query
validate_iban — Validates an International Bank Account Number: country, length for that country, and the mod-97 check digits. Returns electronic and printed formats. A valid I
json_repair — Turns almost-JSON into valid JSON: removes markdown code fences, comments and trailing commas, adds missing quotes, commas and closing brackets, converts single
json_schema_validate — Checks a JSON value against a JSON Schema (drafts 4, 7, 2019-09 and 2020-12) and lists every violation with its location. Use it to confirm structured output or

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Official MCP Registrydev.plumbkit/plumbkit

first seen 15 d ago · fetched 2 d agoopen ↗

Field history (6 recent events)

15 d ago · declared · summary → "Exact utilities for agents: time zones, date math, business days, calculator, units, validation."
15 d ago · declared · description → "Exact utilities for agents: time zones, date math, business days, calculator, units, validation."
15 d ago · declared · publisherName → "dev.plumbkit"
15 d ago · declared · homepageUrl → "https://plumbkit.dev"
15 d ago · declared · version → "1.0.0"
15 d ago · declared · protocols → ["mcp"]

Plumbkit

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