General Tools

almanack.dev

Provides calendar and date utilities including validation, conversion, weekday calculation, and interval measurement.

1 endpoint13 known toolsFirst detected August 28, 2026Last detected August 28, 2026

ENDPOINT 1

https://almanack.dev/mcp

No auth detected

MCP server metadata

Name: almanack
Version: 0.1.0

Capabilities

experimentalpromptsresourcestools

Server instructions

Arithmetic for calendars defined by the caller: any months, any week length, any leap rule, intercalary days outside the week, any number of moons. Every tool takes the whole calendar spec inline. Nothing is stored between calls and nothing is fetched from anywhere. Every answer is exact integer arithmetic on day numbers (Julian Day Numbers; Gregorian 2000-01-01 is 2451545). Results are never estimated, rounded or approximated, and the same call always gives the same answer. A date that does not exist in the given calendar is an error naming the real range, never a nearby date returned quietly. The two render tools return an SVG drawing as text. They are deterministic in the same sense as everything else here: the same arguments always produce byte-identical SVG, containing no timestamps and no generated ids. The SVG is static — no script, no style, no animation — and every caller-supplied string in it is escaped. Call validate_calendar_spec first if you built the spec yourself.

Known tools 13

validate_calendar_spec

Check a calendar spec and list everything wrong with it.

Inferred read-only

convert_date

Convert between a calendar date, its day number, and its Gregorian date.

Inferred read-only

calendar_weekday

Which weekday a date falls on, as a 0-based index into the calendar's own week plus its name.

Inferred read-only

nth_weekday_of_month

The nth given weekday of a month: the 3rd Tuesday, the last Friday.

Inferred read-only

date_interval

The distance between two dates.

Inferred read-only

add_to_date

Move a date by years, months and days.

Inferred read-only

moon_phases

Every moon's phase on a date.

Inferred read-only

format_calendar_date

Write a date out to a pattern.

Potential side effects

parse_calendar_date

Read a written date back into a date.

Inferred read-only

calendar_events

When a recurring event falls.

Inferred read-only

scatter_dates

Scatter a number of dates across a span, for generating events.

Inferred read-only

render_timeline

Draw a date range as a horizontal SVG timeline and return the SVG itself.

Inferred read-only

render_calendar_page

Draw one month of a calendar as an SVG grid and return the SVG itself.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.almanack]
url = "https://almanack.dev/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "almanack": {
      "type": "http",
      "url": "https://almanack.dev/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: almanack
Remote MCP URL: https://almanack.dev/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "almanack": {
      "url": "https://almanack.dev/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "almanack": {
      "type": "http",
      "url": "https://almanack.dev/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "almanack",
  "transport": "streamable-http",
  "url": "https://almanack.dev/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.