Mycal

Malaysia public holidays, school terms, business days & a leave optimizer (13 tools).

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "mycal": {
      "command": "npx",
      "args": [
        "@catlabtech/mycal-mcp-server"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Capabilities & Tool Schemas (13)Self-reported

Inspect callable tools, capabilities, and parameters exposed to AI agents by Mycal.

get_malaysia_holidays

Get public holidays (filter by year, state, type)

check_malaysia_holiday

Check if a date is a holiday or working day

next_malaysia_holiday

Find the next upcoming holiday

malaysia_business_days

Count working days between two dates

malaysia_long_weekends

Find long weekends (3+ days)

malaysia_leave_optimizer

Find the most efficient leave days to take to maximise consecutive days off

Documentation Overview

Malaysia Calendar API

Malaysia's most complete calendar API — public holidays, school calendar, exam schedules, and MCP server for AI tools.

Data source: Official government gazette (JPM BKPP), JAKIM, KPM, MPM. Not scraped from third-party websites.

Packages

Published to npm under the @catlabtech scope:

Package	Purpose	Install
`@catlabtech/mycal-core`	Shared types, Zod schemas, and calendar/business-day logic	`npm install @catlabtech/mycal-core`
`@catlabtech/mycal-sdk`	TypeScript client SDK for the REST API	`npm install @catlabtech/mycal-sdk`
`@catlabtech/mycal-mcp-server`	MCP server exposing 13 calendar tools for AI agents	`npm install @catlabtech/mycal-mcp-server`

Features

49 public holidays for 2026 from official gazette (Warta Kerajaan) — federal + state-specific
16 states + 3 Federal Territories with aliases (KL, JB, Penang, etc.)
Weekend-aware — Kedah/Kelantan/Terengganu use Fri-Sat (Kumpulan A), all others use Sat-Sun (Kumpulan B), with Johor's historical switch tracked
Cuti ganti (replacement holiday) auto-calculation per state weekend config
Business day calculator — per-state, holiday-aware
School calendar — terms, holidays, KPM cuti perayaan (Lampiran A/B/C)
Exam schedules — SPM, STPM, MUET, PT3
iCal subscription feeds — per-state .ics feeds
MCP Server for AI agents — 13 tools for Claude, ChatGPT, and other assistants
TypeScript SDK (@catlabtech/mycal-sdk) with typed responses
OpenAPI 3.1 spec + interactive docs
Trilingual — Bahasa Melayu, English, Chinese names (三语支持)

Quick Start

bash

# Clone and install
git clone https://github.com/Junhui20/malaysia-calendar-api.git
cd malaysia-calendar-api
pnpm install

# Build shared packages
pnpm --filter @catlabtech/mycal-core build
pnpm --filter @catlabtech/mycal-sdk build

# Run API locally (http://localhost:8787)
cd packages/api && npx wrangler dev

# Run web site locally (http://localhost:4321)
pnpm --filter @mycal/web dev

# Validate data
pnpm validate

# Run tests
pnpm test

API Examples

Base URL: https://mycal-api.huijun00100101.workers.dev/v1

List holidays

bash

# All holidays for Selangor in 2026
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&state=selangor"

# Islamic holidays only
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&type=islamic"

# March holidays for KL
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&state=KL&month=3"

Check a date

bash

# Is March 21 a holiday/weekend/working day?
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays/check?date=2026-03-21&state=KL"

Response:

config.json

{
  "data": {
    "date": "2026-03-21",
    "dayOfWeek": "Saturday",
    "isHoliday": true,
    "isWeekend": true,
    "isWorkingDay": false,
    "isSchoolDay": false,
    "holidays": [
      {
        "id": "2026-hari-raya-aidilfitri-1",
        "name": { "ms": "Hari Raya Aidilfitri", "en": "Eid al-Fitr", "zh": "开斋节" },
        "type": "islamic",
        "status": "confirmed"
      }
    ]
  }
}

Business days

bash

# Count working days in March for Selangor
curl "https://mycal-api.huijun00100101.workers.dev/v1/business-days?start=2026-03-01&end=2026-03-31&state=selangor"

# Add 10 business days to a date
curl "https://mycal-api.huijun00100101.workers.dev/v1/business-days/add?date=2026-03-01&days=10&state=selangor"

School calendar

bash

# Is this a school day?
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/is-school-day?date=2026-03-21&state=selangor"

# School holidays for Kumpulan B
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/holidays?year=2026&group=B"

# Exam schedule
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/exams?year=2026&type=spm"

Next holiday

bash

# Next holiday for Penang
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays/next?state=penang"

State resolution

bash

# Resolve alias
curl "https://mycal-api.huijun00100101.workers.dev/v1/states/resolve?q=kl"
# -> { "data": { "canonical": "kuala-lumpur", "group": "B" } }

Full API Reference

Endpoint	Description
`GET /v1/holidays`	List holidays (filter by year, state, type, status, month)
`GET /v1/holidays/check`	Is this date a holiday/weekend/working day/school day?
`GET /v1/holidays/today`	Today's holiday status
`GET /v1/holidays/next`	Next upcoming holiday
`GET /v1/holidays/between`	Holidays in date range
`GET /v1/holidays/leave-optimizer`	Suggest annual-leave days to spend for the longest consecutive break
`GET /v1/business-days`	Count business days between dates
`GET /v1/business-days/add`	Add N business days to a date
`GET /v1/states`	All 16 states + 3 FTs with weekend config
`GET /v1/states/resolve`	Resolve alias (KL, penang, jb) to canonical code
`GET /v1/school/terms`	School term dates + day counts
`GET /v1/school/holidays`	School holidays + KPM cuti perayaan
`GET /v1/school/exams`	SPM, STPM, MUET, PT3 schedule
`GET /v1/school/is-school-day`	Is this a school day?
`GET /v1/feed/ical/:state`	iCal subscription feed
`GET /v1/feed/csv/:state`	CSV/spreadsheet export of holidays
`GET /v1/data/*`	Raw, cacheable open-data snapshots — `manifest`, `states`, `holidays/:year`, `all` (no API key required)
`GET /v1/prayer-times/:zone`	JAKIM prayer times for a zone (MYT-formatted); `GET /v1/prayer-times/zones` lists the zone directory
`POST /v1/keys`	Issue an API key (admin-gated for now; `GET /v1/keys/whoami` checks the caller's tier)

See the full OpenAPI 3.1 spec for request/response schemas.

SDK Usage

server.ts

import { MyCalClient } from "@catlabtech/mycal-sdk";

const cal = new MyCalClient();

// Check if a date is a working day
const result = await cal.check("2026-03-21", "selangor");
console.log(result.isWorkingDay); // false

// List holidays
const holidays = await cal.holidays({ year: 2026, state: "KL" });

// Business days
const workDays = await cal.businessDays("2026-03-01", "2026-03-31", "selangor");
console.log(workDays.businessDays); // 22

// School calendar
const terms = await cal.school.terms({ year: 2026, group: "B" });
const exams = await cal.school.exams({ year: 2026, type: "spm" });
const isSchool = await cal.school.isSchoolDay("2026-03-21", "selangor");

MCP Server

Connect the Malaysia Calendar API to Claude, ChatGPT, or any MCP-compatible AI assistant.

Setup with Claude Desktop / Claude Code

Add to your MCP configuration:

config.json

{
  "mcpServers": {
    "malaysia-calendar": {
      "command": "npx",
      "args": ["@catlabtech/mycal-mcp-server"]
    }
  }
}

Available Tools (13)

Tool	Description
`get_malaysia_holidays`	Get public holidays (filter by year, state, type)
`check_malaysia_holiday`	Check if a date is a holiday or working day
`next_malaysia_holiday`	Find the next upcoming holiday
`malaysia_business_days`	Count working days between two dates
`malaysia_long_weekends`	Find long weekends (3+ days)
`malaysia_leave_optimizer`	Find the most efficient leave days to take to maximise consecutive days off
`list_malaysia_states`	List all states with weekend config
`resolve_malaysia_state`	Resolve alias (KL, JB) to canonical code
`malaysia_holiday_changes`	Recent data changes
`malaysia_school_terms`	School term dates and day counts
`malaysia_school_holidays`	School holidays (cuti penggal, cuti perayaan)
`malaysia_exams`	SPM, STPM, MUET, PT3 exam schedule
`malaysia_is_school_day`	Check if a date is a school day

State Codes

Code	Aliases	Group	Weekend
`johor`	jhr, jb	B	Sat-Sun (was Fri-Sat 2014-2024)
`kedah`	kd, kdh	A	Fri-Sat
`kelantan`	kel, kb	A	Fri-Sat
`terengganu`	trg, kt	A	Fri-Sat
`perak`	prk, ipoh	B	Sat-Sun
`pulau-pinang`	penang, pg	B	Sat-Sun
`selangor`	sel, sgr	B	Sat-Sun
`negeri-sembilan`	ns, n9	B	Sat-Sun
`melaka`	mlk, malacca	B	Sat-Sun
`pahang`	phg, kuantan	B	Sat-Sun
`perlis`	pls, kangar	B	Sat-Sun
`sabah`	sbh, kk	B	Sat-Sun
`sarawak`	swk, kuching	B	Sat-Sun
`kuala-lumpur`	kl	B	Sat-Sun
`wp-putrajaya`	putrajaya, pjy	B	Sat-Sun
`wp-labuan`	labuan, lbn	B	Sat-Sun

State aliases are case-insensitive. Use GET /v1/states/resolve?q=kl to resolve any alias to the canonical code.

Project Structure

Read the full README →View source on GitHub →

Related MCP Servers

View all in Workplace & Productivity View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

npm downloads

76M

Package downloads in the last 30 days.

Last commit

2mo ago

Most recent push to the default branch.

Tools exposed

Callable tools this server registers over MCP.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Mycal

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "mycal": { "command": "npx", "args": ["@catlabtech/mycal-mcp-server"] } }

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Technical Specs & Signals

CategoryWorkplace & Productivity

2/7 checks healthy over the last 45d

56Quality signal: Good · 56/100How this signal is calculated ▾

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Scanned 2d ago via OSV.dev · @catlabtech/mycal-mcp-server (npm)

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More in 🏢 Workplace & Productivity →Best MCP servers for Workplace & Productivity →Alternatives to Mycal →Install in Claude Desktop Install in Cursor Install in VS Code Setup guides for all 13 MCP clients

Mycal

Malaysia public holidays, school terms, business days & a leave optimizer (13 tools).

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "mycal": {
      "command": "npx",
      "args": [
        "@catlabtech/mycal-mcp-server"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Capabilities & Tool Schemas (13)Self-reported

Inspect callable tools, capabilities, and parameters exposed to AI agents by Mycal.

get_malaysia_holidays

Get public holidays (filter by year, state, type)

check_malaysia_holiday

Check if a date is a holiday or working day

next_malaysia_holiday

Find the next upcoming holiday

malaysia_business_days

Count working days between two dates

malaysia_long_weekends

Find long weekends (3+ days)

malaysia_leave_optimizer

Find the most efficient leave days to take to maximise consecutive days off

Documentation Overview

Malaysia Calendar API

Malaysia's most complete calendar API — public holidays, school calendar, exam schedules, and MCP server for AI tools.

Data source: Official government gazette (JPM BKPP), JAKIM, KPM, MPM. Not scraped from third-party websites.

Packages

Published to npm under the @catlabtech scope:

Package	Purpose	Install
`@catlabtech/mycal-core`	Shared types, Zod schemas, and calendar/business-day logic	`npm install @catlabtech/mycal-core`
`@catlabtech/mycal-sdk`	TypeScript client SDK for the REST API	`npm install @catlabtech/mycal-sdk`
`@catlabtech/mycal-mcp-server`	MCP server exposing 13 calendar tools for AI agents	`npm install @catlabtech/mycal-mcp-server`

Features

49 public holidays for 2026 from official gazette (Warta Kerajaan) — federal + state-specific
16 states + 3 Federal Territories with aliases (KL, JB, Penang, etc.)
Weekend-aware — Kedah/Kelantan/Terengganu use Fri-Sat (Kumpulan A), all others use Sat-Sun (Kumpulan B), with Johor's historical switch tracked
Cuti ganti (replacement holiday) auto-calculation per state weekend config
Business day calculator — per-state, holiday-aware
School calendar — terms, holidays, KPM cuti perayaan (Lampiran A/B/C)
Exam schedules — SPM, STPM, MUET, PT3
iCal subscription feeds — per-state .ics feeds
MCP Server for AI agents — 13 tools for Claude, ChatGPT, and other assistants
TypeScript SDK (@catlabtech/mycal-sdk) with typed responses
OpenAPI 3.1 spec + interactive docs
Trilingual — Bahasa Melayu, English, Chinese names (三语支持)

Quick Start

bash

# Clone and install
git clone https://github.com/Junhui20/malaysia-calendar-api.git
cd malaysia-calendar-api
pnpm install

# Build shared packages
pnpm --filter @catlabtech/mycal-core build
pnpm --filter @catlabtech/mycal-sdk build

# Run API locally (http://localhost:8787)
cd packages/api && npx wrangler dev

# Run web site locally (http://localhost:4321)
pnpm --filter @mycal/web dev

# Validate data
pnpm validate

# Run tests
pnpm test

API Examples

Base URL: https://mycal-api.huijun00100101.workers.dev/v1

List holidays

bash

# All holidays for Selangor in 2026
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&state=selangor"

# Islamic holidays only
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&type=islamic"

# March holidays for KL
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays?year=2026&state=KL&month=3"

Check a date

bash

# Is March 21 a holiday/weekend/working day?
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays/check?date=2026-03-21&state=KL"

Response:

config.json

{
  "data": {
    "date": "2026-03-21",
    "dayOfWeek": "Saturday",
    "isHoliday": true,
    "isWeekend": true,
    "isWorkingDay": false,
    "isSchoolDay": false,
    "holidays": [
      {
        "id": "2026-hari-raya-aidilfitri-1",
        "name": { "ms": "Hari Raya Aidilfitri", "en": "Eid al-Fitr", "zh": "开斋节" },
        "type": "islamic",
        "status": "confirmed"
      }
    ]
  }
}

Business days

bash

# Count working days in March for Selangor
curl "https://mycal-api.huijun00100101.workers.dev/v1/business-days?start=2026-03-01&end=2026-03-31&state=selangor"

# Add 10 business days to a date
curl "https://mycal-api.huijun00100101.workers.dev/v1/business-days/add?date=2026-03-01&days=10&state=selangor"

School calendar

bash

# Is this a school day?
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/is-school-day?date=2026-03-21&state=selangor"

# School holidays for Kumpulan B
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/holidays?year=2026&group=B"

# Exam schedule
curl "https://mycal-api.huijun00100101.workers.dev/v1/school/exams?year=2026&type=spm"

Next holiday

bash

# Next holiday for Penang
curl "https://mycal-api.huijun00100101.workers.dev/v1/holidays/next?state=penang"

State resolution

bash

# Resolve alias
curl "https://mycal-api.huijun00100101.workers.dev/v1/states/resolve?q=kl"
# -> { "data": { "canonical": "kuala-lumpur", "group": "B" } }

Full API Reference

Endpoint	Description
`GET /v1/holidays`	List holidays (filter by year, state, type, status, month)
`GET /v1/holidays/check`	Is this date a holiday/weekend/working day/school day?
`GET /v1/holidays/today`	Today's holiday status
`GET /v1/holidays/next`	Next upcoming holiday
`GET /v1/holidays/between`	Holidays in date range
`GET /v1/holidays/leave-optimizer`	Suggest annual-leave days to spend for the longest consecutive break
`GET /v1/business-days`	Count business days between dates
`GET /v1/business-days/add`	Add N business days to a date
`GET /v1/states`	All 16 states + 3 FTs with weekend config
`GET /v1/states/resolve`	Resolve alias (KL, penang, jb) to canonical code
`GET /v1/school/terms`	School term dates + day counts
`GET /v1/school/holidays`	School holidays + KPM cuti perayaan
`GET /v1/school/exams`	SPM, STPM, MUET, PT3 schedule
`GET /v1/school/is-school-day`	Is this a school day?
`GET /v1/feed/ical/:state`	iCal subscription feed
`GET /v1/feed/csv/:state`	CSV/spreadsheet export of holidays
`GET /v1/data/*`	Raw, cacheable open-data snapshots — `manifest`, `states`, `holidays/:year`, `all` (no API key required)
`GET /v1/prayer-times/:zone`	JAKIM prayer times for a zone (MYT-formatted); `GET /v1/prayer-times/zones` lists the zone directory
`POST /v1/keys`	Issue an API key (admin-gated for now; `GET /v1/keys/whoami` checks the caller's tier)

See the full OpenAPI 3.1 spec for request/response schemas.

SDK Usage

server.ts

import { MyCalClient } from "@catlabtech/mycal-sdk";

const cal = new MyCalClient();

// Check if a date is a working day
const result = await cal.check("2026-03-21", "selangor");
console.log(result.isWorkingDay); // false

// List holidays
const holidays = await cal.holidays({ year: 2026, state: "KL" });

// Business days
const workDays = await cal.businessDays("2026-03-01", "2026-03-31", "selangor");
console.log(workDays.businessDays); // 22

// School calendar
const terms = await cal.school.terms({ year: 2026, group: "B" });
const exams = await cal.school.exams({ year: 2026, type: "spm" });
const isSchool = await cal.school.isSchoolDay("2026-03-21", "selangor");

MCP Server

Connect the Malaysia Calendar API to Claude, ChatGPT, or any MCP-compatible AI assistant.

Setup with Claude Desktop / Claude Code

Add to your MCP configuration:

config.json

{
  "mcpServers": {
    "malaysia-calendar": {
      "command": "npx",
      "args": ["@catlabtech/mycal-mcp-server"]
    }
  }
}

Available Tools (13)

Tool	Description
`get_malaysia_holidays`	Get public holidays (filter by year, state, type)
`check_malaysia_holiday`	Check if a date is a holiday or working day
`next_malaysia_holiday`	Find the next upcoming holiday
`malaysia_business_days`	Count working days between two dates
`malaysia_long_weekends`	Find long weekends (3+ days)
`malaysia_leave_optimizer`	Find the most efficient leave days to take to maximise consecutive days off
`list_malaysia_states`	List all states with weekend config
`resolve_malaysia_state`	Resolve alias (KL, JB) to canonical code
`malaysia_holiday_changes`	Recent data changes
`malaysia_school_terms`	School term dates and day counts
`malaysia_school_holidays`	School holidays (cuti penggal, cuti perayaan)
`malaysia_exams`	SPM, STPM, MUET, PT3 exam schedule
`malaysia_is_school_day`	Check if a date is a school day

State Codes

Code	Aliases	Group	Weekend
`johor`	jhr, jb	B	Sat-Sun (was Fri-Sat 2014-2024)
`kedah`	kd, kdh	A	Fri-Sat
`kelantan`	kel, kb	A	Fri-Sat
`terengganu`	trg, kt	A	Fri-Sat
`perak`	prk, ipoh	B	Sat-Sun
`pulau-pinang`	penang, pg	B	Sat-Sun
`selangor`	sel, sgr	B	Sat-Sun
`negeri-sembilan`	ns, n9	B	Sat-Sun
`melaka`	mlk, malacca	B	Sat-Sun
`pahang`	phg, kuantan	B	Sat-Sun
`perlis`	pls, kangar	B	Sat-Sun
`sabah`	sbh, kk	B	Sat-Sun
`sarawak`	swk, kuching	B	Sat-Sun
`kuala-lumpur`	kl	B	Sat-Sun
`wp-putrajaya`	putrajaya, pjy	B	Sat-Sun
`wp-labuan`	labuan, lbn	B	Sat-Sun

State aliases are case-insensitive. Use GET /v1/states/resolve?q=kl to resolve any alias to the canonical code.

Project Structure

Read the full README →View source on GitHub →

Related MCP Servers

View all in Workplace & Productivity View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

npm downloads

76M

Package downloads in the last 30 days.

Last commit

2mo ago

Most recent push to the default branch.

Tools exposed

Callable tools this server registers over MCP.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Mycal

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "mycal": { "command": "npx", "args": ["@catlabtech/mycal-mcp-server"] } }

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Technical Specs & Signals

CategoryWorkplace & Productivity

2/7 checks healthy over the last 45d

56Quality signal: Good · 56/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools25/30

Adoption & activity7/15

Community engagement0/10

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 2d ago via OSV.dev · @catlabtech/mycal-mcp-server (npm)

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Mycal

Quick Install

Client Config & Setup

Documentation Overview

Malaysia Calendar API

Links

Packages

Features

Quick Start

API Examples

List holidays

Check a date

Business days

School calendar

Next holiday

State resolution

Full API Reference

SDK Usage

MCP Server

Setup with Claude Desktop / Claude Code

Available Tools (13)

State Codes

Project Structure

Related MCP Servers

Adoption & maintenance

Reviews

Frequently Asked Questions about Mycal

AllMCPs Directory Badge

Technical Specs & Signals

Supply-chain signal

AllMCPs Server

Own this project?

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Mycal

Quick Install

Client Config & Setup

Documentation Overview

Malaysia Calendar API

Links

Packages

Features

Quick Start

API Examples

List holidays

Check a date

Business days

School calendar

Next holiday

State resolution

Full API Reference

SDK Usage

MCP Server

Setup with Claude Desktop / Claude Code

Available Tools (13)

State Codes

Project Structure

Related MCP Servers

Adoption & maintenance

Reviews

Frequently Asked Questions about Mycal

AllMCPs Directory Badge

Technical Specs & Signals

Supply-chain signal

AllMCPs Server

Own this project?

Share & Embed

Explore more