DEV Community: 2x lazymac

Text Analysis API — 5분 안에 프로젝트에 통합하기

2x lazymac — Tue, 21 Apr 2026 00:30:48 +0000

Text Analysis API — 5분 안에 프로젝트에 통합하기

고객 리뷰 분석, 콘텐츠 최적화, 챗봇

프로젝트에 text analysis 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/text-analysis/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/text-analysis/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/text-analysis/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/text-analysis/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "text-analysis": {
      "url": "https://api.lazy-mac.com/text-analysis/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @text-analysis 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

Building a Crypto Trading Signal API With Real-Time Binance Data

2x lazymac — Mon, 20 Apr 2026 16:00:05 +0000

Binance provides one of the best free market data APIs available. Here's how to build a crypto trading signal API on top of it using Cloudflare Workers.

The Data Source

Binance REST API (no auth required for public market data):

# Current price
curl "https://api.binance.com/api/v3/ticker/price?symbol=BTCUSDT"

# 1-hour candlestick data
curl "https://api.binance.com/api/v3/klines?symbol=BTCUSDT&interval=1h&limit=100"

# Order book depth
curl "https://api.binance.com/api/v3/depth?symbol=BTCUSDT&limit=20"

Signal Logic (Simplified)

function generateSignal(candles) {
  const closes = candles.map(c => parseFloat(c[4]));

  // Simple moving averages
  const sma20 = closes.slice(-20).reduce((a, b) => a + b) / 20;
  const sma50 = closes.slice(-50).reduce((a, b) => a + b) / 50;
  const current = closes[closes.length - 1];

  // RSI (simplified)
  const gains = [], losses = [];
  for (let i = 1; i < closes.length; i++) {
    const diff = closes[i] - closes[i-1];
    diff > 0 ? gains.push(diff) : losses.push(Math.abs(diff));
  }
  const rsi = 100 - (100 / (1 + (gains.slice(-14).reduce((a,b)=>a+b,0)/14) /
                                 (losses.slice(-14).reduce((a,b)=>a+b,0)/14)));

  if (sma20 > sma50 && rsi < 70 && current > sma20) return 'BUY';
  if (sma20 < sma50 && rsi > 30 && current < sma20) return 'SELL';
  return 'HOLD';
}

Wrapping it as an API

// Cloudflare Worker
export default {
  async fetch(request) {
    const url = new URL(request.url);
    const symbol = url.searchParams.get('symbol') || 'BTCUSDT';
    const interval = url.searchParams.get('interval') || '1h';

    const klines = await fetch(
      `https://api.binance.com/api/v3/klines?symbol=${symbol}&interval=${interval}&limit=100`
    ).then(r => r.json());

    const signal = generateSignal(klines);
    const price = parseFloat(klines[klines.length-1][4]);

    return Response.json({ symbol, signal, price, interval, timestamp: Date.now() });
  }
};

Disclaimer: This is for educational purposes. Automated trading carries significant financial risk.

Crypto Signal API | Full API store

SEO Analyzer API — 5분 안에 프로젝트에 통합하기

2x lazymac — Mon, 20 Apr 2026 00:30:40 +0000

SEO Analyzer API — 5분 안에 프로젝트에 통합하기

블로거, 마케터, SEO 에이전시, SaaS 랜딩페이지

프로젝트에 seo analyzer 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/seo/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/seo/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/seo/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/seo/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "seo": {
      "url": "https://api.lazy-mac.com/seo/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @seo 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

Email Validation API: Why Regex Isn't Enough (And What to Use Instead)

2x lazymac — Sun, 19 Apr 2026 16:00:02 +0000

/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/ — this regex passes test@test.t and fails user+tag@subdomain.example.co.uk. Here's why email validation needs more than regex.

What Regex Gets Wrong

// This regex passes invalid addresses:
const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
console.log(re.test('not-an-email@'));        // false ✅
console.log(re.test('a@b.c'));                // true — valid format, invalid TLD
console.log(re.test('test@[192.168.1.1]'));   // false — actually valid per RFC 5321
console.log(re.test('"test test"@example.com')); // false — actually valid

And it can't catch:

Disposable email addresses (Mailinator, Guerrilla Mail, etc.)
Typos in the domain (gmial.com, yhaoo.com)
Non-existent domains
Full inboxes (will bounce)

Production-Grade Validation

import requests

def validate_email(email: str) -> dict:
    resp = requests.get("https://api.lazy-mac.com/email-validator/check", params={
        "email": email,
        "check_mx": True,        # Verify domain has mail server
        "check_disposable": True, # Block throwaway addresses
        "suggest_correction": True # Catch typos
    })
    return resp.json()

result = validate_email("user@gmial.com")
# {
#   "valid": false,
#   "reason": "domain_not_found",
#   "suggestion": "user@gmail.com",
#   "disposable": false,
#   "mx_found": false
# }

The Validation Funnel

Run these checks in order (cheapest to most expensive):

Format check (regex) — free, instant
Domain existence (DNS lookup) — fast, catches typos
MX record check (DNS) — catches "no mail server"
Disposable email list — catches throwaway addresses
SMTP ping (optional) — most accurate, but slow and often blocked

For signup forms: steps 1-4 are the sweet spot.

The Business Case

A 10% bounce rate on your email list:

Triggers spam filters for all your emails
Reduces deliverability for your entire domain
Can get your SendGrid/Mailgun account suspended

One-time validation at signup pays for itself.

Email Validator API | Full API store

Smart Contract Scanner API — 5분 안에 프로젝트에 통합하기

2x lazymac — Sun, 19 Apr 2026 00:30:36 +0000

Smart Contract Scanner API — 5분 안에 프로젝트에 통합하기

DeFi, NFT, DAO — 배포 전 보안 검사 필수

프로젝트에 smart contract scanner 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/smart-contract/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/smart-contract/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/smart-contract/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/smart-contract/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "smart-contract": {
      "url": "https://api.lazy-mac.com/smart-contract/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @smart-contract 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

QR Code API Deep Dive: Dynamic vs Static, Analytics, Best Practices

2x lazymac — Sat, 18 Apr 2026 16:00:02 +0000

QR codes seem simple until you need them at scale. Here's a deep dive into dynamic vs static QR codes, analytics, and best practices for production use.

Static vs Dynamic: The Core Difference

Static QR codes encode the destination URL directly in the pattern. Once generated, the destination can't change.

Dynamic QR codes encode a short redirect URL. The destination can be changed anytime without reprinting the QR code.

For product packaging, marketing materials, or anything printed: always use dynamic.

Generating QR Codes via API

import requests

# Static QR code
resp = requests.get("https://api.lazy-mac.com/qr-code/generate", params={
    "data": "https://your-site.com/product/123",
    "size": 300,
    "format": "png",
    "error_correction": "H"  # High: survives 30% damage
})
# Returns PNG binary

# Dynamic QR code with analytics
resp = requests.post("https://api.lazy-mac.com/qr-code/dynamic", json={
    "destination": "https://your-site.com/product/123",
    "campaign": "print-q1-2026",
    "track_scans": True
})
data = resp.json()
print(data['qr_url'])      # The QR code image URL
print(data['short_url'])   # The encoded short redirect
print(data['tracking_id']) # Use this to query scan analytics

Error Correction Levels

Level	Data Recovery	Size Increase	Use Case
L	7%	Minimal	Clean digital displays
M	15%	Small	General use
Q	25%	Medium	Industrial/outdoor
H	30%	Large	Printed materials, stickers

Always use H for anything printed. Scratches, folds, and dirt happen.

Best Practices

Minimum size: 2cm × 2cm for phone scanning. Larger for distance scanning.
Quiet zone: Leave white border of at least 4 modules around the code.
Contrast: Black on white is most reliable. Colored QR codes need testing.
Test before printing: Scan with 3 different phones before finalizing.
Dynamic for campaigns: Track scan counts, locations, and time-of-day.

QR Code Generator API | Full API store

AI Cost Calculator API — 5분 안에 프로젝트에 통합하기

2x lazymac — Sat, 18 Apr 2026 00:30:37 +0000

AI Cost Calculator API — 5분 안에 프로젝트에 통합하기

AI 스타트업, MLOps, LLM 비용 관리

프로젝트에 ai cost calculator 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/ai-cost/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/ai-cost/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/ai-cost/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/ai-cost/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "ai-cost": {
      "url": "https://api.lazy-mac.com/ai-cost/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @ai-cost 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

I Automated My Entire Side Project with AI Agents — Here's the Stack

2x lazymac — Fri, 17 Apr 2026 16:00:03 +0000

Six months ago I decided to automate everything on my side project. Here's the exact agent stack I built, what broke, and what actually works.

The Goal

Revenue-generating automation that runs 24/7 without manual intervention. Not demos — production systems that handle real money.

The Stack (What Actually Works)

Mac Mini M2 (always-on)
├── Claude Code + MCP — the brain and hands
├── LaunchAgents — 6 persistent daemons (cron-like, macOS native)
├── Cloudflare Workers — 30+ APIs, global edge, free tier
├── Playwright — browser automation for platforms without APIs
└── SQLite / KV — state management between runs

Agent 1: Content Publisher

Posts to Dev.to daily. Auto-generates articles from a topic queue. Cycles through 40 topics, resets.

# LaunchAgent plist (simplified)
<key>StartInterval</key><integer>86400</integer>
<key>ProgramArguments</key>
<array>
  <string>/bin/bash</string>
  <string>/path/to/devto-daily-publish.sh</string>
</array>

Result: 36 articles published, zero manual effort.

Agent 2: Product Health Monitor

Checks every API endpoint every 30 minutes. Pings Telegram on failure.

Result: Caught 3 silent failures before they became customer complaints.

Agent 3: Revenue Tracker

Scrapes Gumroad + RapidAPI sales, sends daily Telegram digest.

Result: Know my numbers without logging in anywhere.

What Broke

Playwright + Cloudflare: CF bot protection blocks headless Chrome. Fix: use real Chrome session via cookie injection.
LaunchAgent environment: PATH is different from terminal. Every script needs absolute paths.
API token expiry: Automate token refresh or the whole chain breaks silently.

The Compound Effect

Week 1: Setup took ~20 hours.
Week 2-4: 2 hours/week maintaining.
Month 2+: 30 minutes/week monitoring.

The leverage ratio compounds over time.

Full API catalog | Gumroad store

Crypto Trading Signals API — 5분 안에 프로젝트에 통합하기

2x lazymac — Fri, 17 Apr 2026 13:02:41 +0000

Crypto Trading Signals API — 5분 안에 프로젝트에 통합하기

트레이딩 봇, 알림 시스템, 포트폴리오 대시보드

프로젝트에 crypto trading signals 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/crypto-signal/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/crypto-signal/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/crypto-signal/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/crypto-signal/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "crypto-signal": {
      "url": "https://api.lazy-mac.com/crypto-signal/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @crypto-signal 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

Crypto Trading Signals API — 5분 안에 프로젝트에 통합하기

2x lazymac — Fri, 17 Apr 2026 00:30:38 +0000

Crypto Trading Signals API — 5분 안에 프로젝트에 통합하기

트레이딩 봇, 알림 시스템, 포트폴리오 대시보드

프로젝트에 crypto trading signals 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/crypto-signal/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/crypto-signal/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/crypto-signal/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/crypto-signal/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "crypto-signal": {
      "url": "https://api.lazy-mac.com/crypto-signal/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @crypto-signal 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버

Korea's PIPA vs GDPR: What Your SaaS Needs Before Expanding to Asia

2x lazymac — Thu, 16 Apr 2026 16:00:04 +0000

Korea's Personal Information Protection Act (PIPA) is stricter than GDPR in several key ways. If your SaaS is expanding to Asia, here's what you must know before going live.

PIPA vs GDPR: Key Differences

Aspect	GDPR	PIPA
Legitimate interest	✅ Allowed	❌ Not recognized
Consent granularity	Bundled OK	Each purpose separately
Cross-border transfer	Adequacy or SCCs	Explicit user consent or contract
Data localization	Not required	Sensitive data: local server preferred
Fines	4% global revenue	Up to ₩300M ($220k)
DPO requirement	Required for large processors	Required for companies handling 50k+ records

The Consent Requirement That Catches Everyone

PIPA requires explicit consent for each separate purpose. You cannot bundle: "We use your data for service delivery, marketing, and analytics" into one checkbox.

You need three separate consent checkboxes, each explaining:

What data
Why collected
How long retained
Third parties who receive it

Quick Compliance Check

# Scan your site for PIPA compliance issues
curl "https://api.lazy-mac.com/k-privacy-scanner/scan?url=https://your-site.com"

Returns a JSON report flagging:

Missing consent granularity
Inadequate privacy policy sections
Cross-border transfer disclosure gaps
Data retention policy issues

What to Fix Before Korea Launch

Separate consent forms for each data purpose
Korean privacy policy (translation not enough — structure matters)
Data subject rights page: access, correction, deletion in Korean
Cross-border transfer notice if any data leaves Korea
DPO appointment if you'll have 50k+ Korean users

The PIPA scan API catches ~80% of common violations before they become audit findings.

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Fake Data Generator API — 5분 안에 프로젝트에 통합하기

2x lazymac — Thu, 16 Apr 2026 00:30:40 +0000

Fake Data Generator API — 5분 안에 프로젝트에 통합하기

QA, 데모, 프로토타입, 부하 테스트

프로젝트에 fake data generator 기능이 필요한데 직접 구현하기엔 시간이 아까운가요?
REST API 한 줄이면 됩니다.

Quick Start

# 즉시 테스트 (API 키 불필요)
curl https://api.lazy-mac.com/fake-data/

실전 예제

Python

import requests

resp = requests.get("https://api.lazy-mac.com/fake-data/", params={"q": "test"})
data = resp.json()
print(data)

JavaScript (Node.js)

const resp = await fetch("https://api.lazy-mac.com/fake-data/?q=test");
const data = await resp.json();
console.log(data);

cURL

curl -s "https://api.lazy-mac.com/fake-data/?q=test" | jq .

MCP 서버로 사용하기 (Claude, Cursor, Windsurf)

AI 코딩 도구에서 직접 호출하고 싶다면 MCP 설정 한 줄이면 됩니다:

{
  "mcpServers": {
    "fake-data": {
      "url": "https://api.lazy-mac.com/fake-data/mcp"
    }
  }
}

Claude Code, Cursor, Windsurf 어디서든 @fake-data 하면 바로 사용 가능.

왜 직접 구현 대신 API를 쓸까?

직접 구현	API 사용
라이브러리 설치+유지보수	curl 한 줄
에지 케이스 대응	이미 처리됨
서버 비용	무료 100회/월
업데이트 부담	자동 업데이트

Pricing

Plan	Requests/mo	Price
Free	100	$0
Pro	10,000	$9.99/mo
Business	Unlimited	$49/mo

Get Started: Gumroad | API Hub | MCPize

Part of lazymac API Hub — 24개 프로덕션 API + MCP 서버