Almanack

Name: Almanack
Author: dev.almanack

MCP serverMCP

Date math and SVG rendering for fictional and custom calendars. Exact, stateless and deterministic.

by dev.almanackhomepage ↗v0.7.0

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30-day availability1/1 checks ok

30 days agotoday

when	check	result	http	latency	detail
40 min ago	mcp initialize	ok	200	63 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools
8 h ago	mcp initialize	ok	200	61 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools
14 h ago	mcp initialize	ok	200	51 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools
20 h ago	mcp initialize	ok	200	74 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools
27 h ago	mcp initialize	ok	200	56 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools
2 d ago	mcp initialize	ok	200	54 ms	server almanack 0.7.0 · protocol 2025-06-18 · 15 tools

Tools observed via MCP handshake

validate_calendar_spec — Check a calendar spec and list everything wrong with it. Returns structured errors and warnings; it never throws and never partially accepts a spec. Errors mean
convert_date — Convert between a calendar date, its day number, and its Gregorian date. Give exactly one of date, day_number, gregorian or one of their plurals dates, day_numb
calendar_weekday — Which weekday a date falls on, as a 0-based index into the calendar's own week plus its name. Exact; never estimates. Returns weekday null when the date is an i
nth_weekday_of_month — The nth given weekday of a month: the 3rd Tuesday, the last Friday. n is 1-based from the start of the month, or negative from the end (-1 is the last). Only da
date_interval — The distance between two dates. 'days' is the exact signed count (negative when end precedes start) and is always reliable. 'calendar' breaks the same distance
add_to_date — Move a date by years, months, days and ticks. They are applied in that fixed order, which matters: a month then a day is not always the same landing as a day th
moon_phases — Every moon's phase on a date. 'fraction' is the exact position in the cycle, 0.0 at new and 0.5 at full, and is the number to compute with. 'phase' is only whic
format_calendar_date — Write a date out to a pattern. pattern is either a name from the calendar's own 'formats' (names win) or a pattern written out. Tokens: {day} {day-name} {month}
parse_calendar_date — Read a written date back into a date. Strict, with no fuzzy matching of any kind: literal characters must match character for character, month, weekday, era and
calendar_events — When recurring events fall, and whether they land on each other. query 'next' gives the first occurrence after the date in 'after' (or on it when inclusive is t
calendar_periods — Which named periods of the year a date falls in — a season, a tide, a term. Answers with a list, not one: a calendar may declare several cycles of periods and a
sun_daylight — How long each sun is up on a date, and between which times of day. THE CURVE IS DECLARED BY THE SPEC, NEVER INFERRED, and that is the point of this tool: a shor
scatter_dates — Scatter a number of dates across a span, for generating events. The seed is required and the draw is fully deterministic: the same calendar, span, count, seed a
render_timeline — Draw a date range as a horizontal SVG timeline and return the SVG itself. Both ends of the range are included. Axis ticks choose their own granularity from the
render_calendar_page — Draw one month of a calendar as an SVG grid, or a whole year on one sheet, and return the SVG itself. Columns come from the calendar's own week, so a ten-day we

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Official MCP Registrydev.almanack/almanack

first seen 2 d ago · fetched 2 d agoopen ↗

Field history (6 recent events)

2 d ago · declared · summary → "Date math and SVG rendering for fictional and custom calendars. Exact, stateless and deterministic."
2 d ago · declared · description → "Date math and SVG rendering for fictional and custom calendars. Exact, stateless and deterministic."
2 d ago · declared · publisherName → "dev.almanack"
2 d ago · declared · homepageUrl → "https://almanack.dev"
2 d ago · declared · version → "0.7.0"
2 d ago · declared · protocols → ["mcp"]

Almanack

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