mew.monster
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3 products· Claude inside

Software for music academies, product teams and AI classrooms.

뮤몬스터 builds Monster SaaS for academy operations, DevOps for the teams who plan and test products, and the tools and lectures that bring AI to everyone.

Explore products See Claude in action
Products

Three products. Two education projects.

See real screens
Monster SaaS Flagship

Lessons, attendance, rooms, revenue and payroll for multi-branch music academies.

In use at music academies
DevOps Teams

Specs, flows, QA, issues, schedules and API health in one workspace per project.

Monster AI Claude

The Claude layer inside Monster SaaS and DevOps. It writes drafts that people approve.

Modu AI Lounge Project

AI classes at five Gyeonggi-province media centers, in one place.

AI Lab Lectures Project

Beginner courses from the first prompt to real data and automation.

Live demos

Don't take our word for it. Open them yourself.

Two things we built run right here on mew.monster, and you can try one below. No sign-up, no install.

API Checker catalog with verification status for each public APILive
mew.monster/demos/api-checker

API Checker

Search all 10,086 public APIs on Korea's Digital Convergence Platform by category, provider or keyword, and see which ones we confirmed return real data.

Read-only. Catalog and verification results only; stored API responses and key-based checks stay in the local version.

Open API Checker
A white cat playing a red drum kit, from the real-time 3D filmReal-time 3D
mew.monster/demos/drum-kit

The Drum Kit

A white cat plays while one unbroken camera move introduces the snare, hi-hat, cymbals, toms and bass drum. It renders live in your browser with Three.js.

Made with Promptfilm, an open-source tool for researched 3D motion graphics.

Play the film
Try it here

Search 10,086 public APIs

This is API Checker's real search, running on its real data. Type what you need and see which APIs we confirmed actually return data.

10,086 APIs18 categories106 confirmed with real data

How it works

From a plan to a clear month-end.

Plan features in DevOps, run the academy in Monster SaaS, and let Claude turn the day's activity into answers.

Attendance specDevOps · Monster SaaS
Syncing
USR-ATT-001Mark present in one tap
USR-ATT-002Absence opens a make-up
USR-ATT-003Dashboard count updates
USR-ATT-004Change is logged
Plan

Write the spec once

Screens, flows, events and test cases live in DevOps, linked to each other.

Live academyAll branches
Receiving
Attendance markedPiano · Room A
Room bookedStudio 1 · 19:00
Payment recordedMonthly pass
Make-up scheduledViolin · Fri
Inquiry answeredParent message
Run

Run every branch

Lessons, rooms, payments and messages flow into one dashboard as they happen.

Weekly summaryWritten by Claude
+6.3%
412 lessons attended
Make-up backlog7 lessons
Busiest roomStudio 1
Understand

Get answers, not exports

Claude reads the totals and writes the summary staff actually need.

Product features

Everything an academy runs on. Plus the tools that build it.

Daily operations in Monster SaaS, product work in DevOps, public data in API Checker, and our AI education projects.

Attendance

Mark attendance in one tap

Scheduled, present, late, absent. Every change reaches the dashboard and the make-up list.

Practice rooms

Fill rooms, not spreadsheets

Hourly occupancy, overlap checks and booking rules for every room and branch.

Settlement

Close payroll with confidence

Calculate, adjust with a reason, approve and lock. Every change is logged.

Specs · DevOps

One source of truth

Screens, flows, events and the data model stay linked, with a map that lays itself out.

QA · DevOps

Tests that keep up

Test cases move from draft to approved, and flag themselves when the spec changes.

API health · DevOps

Know before users do

DNS, connect, TLS and response checks with uptime bars, incidents and reports.

Public data · API Checker

Find APIs that really work

A 200 response isn't enough. API Checker tells real data apart from empty or error payloads.

Project · AI Lounge

AI classes near you

Five media centers, 50 courses and every notice, in one public site.

Project · Lectures

From first prompt to automation

Beginner lectures on vibe coding, public data, n8n and cloud, built around one running example.

Real screens

See the products. Data blurred for privacy.

Revenue · 12-month trend per branch, manual entries, CSV

Consultations · unified inbox

Students & guardians

Screens use demo data. Names, contacts, amounts and project content are blurred.

Customer feedback

What the people using it say.

Monster SaaS

“We spend less time checking schedules and more on lessons.”

Lessons, attendance and make-up history are all in one place. Even when a teacher changes, the new teacher can look at past records and guide the student.

— Music academy owner · Monster SaaS
Monster SaaS

“Explaining payroll got much easier.”

Seeing each teacher's lessons next to their settlement amount makes it easy to explain how a figure was calculated. Edits can be reviewed again, which helps close out the month.

— Academy administrator · Monster SaaS
DevOps

“No more hunting for the spec and the test list separately.”

Feature descriptions, screen flows and QA items are linked. When a change request comes in, it is clear what to fix and how far to re-check.

— Service planner · DevOps
Claude

“With AI drafting the first pass, we can focus on review.”

Writing specs and test items from scratch is less of a burden. Rather than using the output as is, we check it against our service and fill the gaps, which suits us.

— Software developer · Claude features
API Checker

“I can check an API works before using it in class.”

I once picked an API from its docs alone, got no data, and had to change the exercise. Checking for a real response first makes preparing a hands-on class much easier.

— AI education instructor · API Checker
AI education

“Having built something myself makes me want to try the next one.”

Coding felt unfamiliar at first, but building and running small features helped me understand the flow. Now I want to adapt the class example to my own work.

Monster AI · powered by Claude

Ask your academy. Keep the product organized.

Claude connects Monster SaaS and DevOps. Staff get plain answers about their day, and the product team gets specs and tests that stay current.

Front deskExampleWhich branch has the most make-ups?
Monster AI · ClaudeAggregates only

Branch B needs attention This month

Branch A4
Branch B11
Branch C6

Most are Friday violin lessons. Studio 2 is free on Saturday mornings.

Plain answers from your own numbers.

Claude reads counts and totals from Monster SaaS, never names or phone numbers, and answers in the words staff use.

  • Weekly summaries for directorsIn production
  • Reply drafts for parent inquiriesIn production
  • Flags for unusual payroll changesIn development
  • Spec, test and release drafts in DevOpsIn production

Watch Claude draft a spec.

Feature doc → Claude → DevOps draft → approval
attendance.mdMonster SaaS feature doc
  • Mark present in one tap
  • Absence opens a make-up
  • Dashboard count updates
  • Change is logged
Claude APIstructured outputDrafting spec…
DevOps · Attendance specDraftApproved
USR-ATT-001Mark present in one tap
USR-ATT-002Absence opens a make-up
USR-ATT-003Dashboard count updates
USR-ATT-004Change is logged
Gap found: no event for notifying guardians of an absence
Approved by the QA lead after review

People approve. Everything Claude writes lands in DevOps as a draft. A planner or QA lead approves it, and revision checks stop a draft from overwriting newer edits.

OrganizeIn production

Specs from feature docs

Turn Monster SaaS feature docs into DevOps features, events and exceptions.

OrganizeIn production

Drift check

Compare the spec with real routes and tables, and list what's missing.

QualityIn production

Test case drafts

Draft QA cases for booking conflicts, payroll locks and attendance changes.

OperateIn production

Incident summaries

Explain what failed, when and why, from DevOps health checks.

OperateIn production

Release notes

Turn a history compare into notes for staff and a changelog for developers.

OptimizeIn production

Academy insights

Spot make-up backlogs and full rooms from the totals.

AssistIn production

Reply drafts

Draft answers to parent inquiries from schedules and policies.

OrganizeIn development

Data summaries

Group failed API checks by cause for the education team.

spec-assistant.ts · Anthropic TypeScript SDK
import Anthropic from "@anthropic-ai/sdk";
import { z } from "zod";
import { zodOutputFormat } from "@anthropic-ai/sdk/helpers/zod";

const client = new Anthropic();

// Matches DevOps features, events and exceptions
const SpecDraft = z.object({
  features: z.array(z.object({
    name: z.string(),
    screen: z.string(),
    description: z.string(),
    exceptions: z.array(z.string()),
    events: z.array(z.object({ code: z.string(), trigger: z.string(), output: z.string() })),
  })),
  gaps: z.array(z.string()),
});

export async function draftSpec(featureDoc: string, specExport: string) {
  const res = await client.messages.parse({
    model: "claude-opus-5-5",
    max_tokens: 16000,
    output_config: { effort: "high", format: zodOutputFormat(SpecDraft) },
    system: [
      { type: "text", text: AUTHORING_GUIDE },
      // Large, stable spec export: cached across calls
      { type: "text", text: specExport, cache_control: { type: "ephemeral" } },
    ],
    messages: [{ role: "user", content: `Draft DevOps features for this Monster SaaS doc.
List gaps against the current spec.

${featureDoc}` }],
  });

  if (res.stop_reason === "refusal") throw new Error("Claude declined");
  return res.parsed_output; // saved in DevOps as a draft
}

Safe and affordable by design

  • Drafts only. Claude never approves its own output.
  • Typed output. Every draft is checked against the DevOps schema.
  • Through the API. Roles and revision checks still apply.
  • No personal data. Prompts get counts and totals, not names.
  • Low cost. Cached spec export, nightly batches at half price, effort set per task.
  • Traceable. Each call is logged with token usage next to the change it produced.
Built for the whole day

From the first lesson to the last release.

Attendance Monster SaaS Practice rooms Monster SaaS Teacher settlement Monster SaaS Revenue & CSV Monster SaaS Make-up lessons Monster SaaS Consultations Monster SaaS
Feature specs DevOps Flow map DevOps QA design DevOps API health DevOps 10,086 public APIs API Checker AI lectures AI Lab Claude drafts Monster AI
Our purpose

We build software that makes everyday work easier.

From daily academy operations to a first AI project, our products help people put technology to work. These are the rules we build by.

01

People stay in charge

Claude writes drafts. A person reviews and approves every one before it is used.

02

Personal data stays out of prompts

Claude gets counts and totals, never student or guardian names and phone numbers.

03

Design first, test before release

We write design documents before building and run automated tests before every release.

04

Show, don't just tell

Our demos run on this site, our domain is verified on GitHub, and our code is public there.

About

Building since May 2025.

MEW Monster makes software for music academies, product teams and AI education, and connects its products with Claude.

Company
MEW Monster (뮤몬스터)
Started
May 2025
Stage
Bootstrapped
Team
2–5 people
Customers
Music academies run daily operations on Monster SaaS
Built on
Claude API · 7 workflows in production
Representative
뮤몬스터 (MEW Monster) · @mewmonster
GitHub
github.com/mew-monster · Verified domain
Contact
hello@mew.monster
Work with us

Choose your starting point.

ProductsReady to use

Use what we've built.

Run your academy, your product team or your public-data program on our products.

  • Monster SaaS for multi-branch academies
  • DevOps for planners, developers and QA
  • API Checker for public-data programs
Explore products
Custom buildsWith Claude

Build it with us.

Operations software and Claude features designed for your data, tested before it ships.

  • Claude features on your own data, with approval steps
  • Dashboards, admin tools and booking systems
  • Public-data and education services
  • Design-first process with automated tests
Contact us
FAQ

Questions, answered.

What does 뮤몬스터 make?
Three products: Monster SaaS for music academies, DevOps for product teams and API Checker for public data. Claude connects Monster SaaS and DevOps. We also work on two AI education projects: the Modu AI Lounge website and the AI Lab lecture program.
Can I try your products?
Yes. API Checker runs as a read-only demo at mew.monster/demos/api-checker, and The Drum Kit film plays at mew.monster/demos/drum-kit. Monster SaaS and DevOps hold academy and project data, so they are shown here as screenshots with details blurred. Email hello@mew.monster for a walkthrough.
Is Monster SaaS in use today?
Yes. Music academies run their daily lessons, attendance, rooms and settlement on it. We don't publish customer names or counts without their consent.
Who is Monster SaaS for?
Music academy directors, branch managers, front-desk staff and teachers. It covers the dashboard, students and guardians, lesson calendar, attendance and make-up lessons, practice rooms, revenue, teacher settlement and consultations.
Can one account run several branches?
Yes. A branch switcher at the top applies to every page. Pick one branch or see all branches together.
How is personal data protected?
Student and guardian contact details stay on the server. Dashboards and Claude get counts and totals only. The academy is always taken from the signed-in session, never from the request.
What does Claude do, exactly?
Claude writes drafts: spec and test drafts in DevOps, weekly summaries, release notes and reply drafts. A person approves each one before it's used. These run in production today; payroll change alerts and API check summaries are still in development.
Can other teams use DevOps?
Yes. DevOps keeps one workspace per project for screens, flows, events, data model, QA, issues, documents, schedules and API health, with company SSO and project roles.
How do you handle security?
Everything is served over HTTPS with HSTS. Student and guardian contact details stay on the server, and Claude only receives aggregated numbers. Report a vulnerability to hello@mew.monster; our security contact is also published at mew.monster/.well-known/security.txt.
Can you build something custom for us?
Yes. We build operations software, public-data services and Claude features to spec, with design documents first and automated tests before release.
Start with one academy

See your whole academy on one screen.

Bring lessons, rooms, payments and people together, then let Claude tell you what changed this week.

Contact us