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Cold Email Verifier and Guesser (공개)

콜드 이메일 검증, 리드 목록 보강, 또는 CSV에서 이메일 주소를 자동으로 추측해야 할 때 사용합니다. ValidEmail.co 또는 오픈소스 Reacher 엔진을 지원합니다.

Cold Email Verifier and Guesser (공개)란 무엇인가요?

이 스킬은 리드 CSV 파일(이름, 성, 회사명 포함)을 자동으로 처리하여 회사의 공식 도메인을 찾고, 전문적인 이메일 형식을 생성한 후 엄격하게 전달 가능성을 검증합니다. Clearbit API를 사용해 도메인을 조회하고 일반적인 3가지 이메일 패턴([email protected], [email protected], [email protected])을 생성합니다. 검증 방식으로는 엔터프라이즈급 정확도를 제공하는 ValidEmail.co API(무료 티어 포함)와 오픈소스 Reacher(자체 호스팅 또는 로컬 CLI)를 선택할 수 있습니다. Claude Code, Cursor, Codex 등 터미널에서 Python 스크립트를 실행할 수 있는 모든 AI 어시스턴트와 호환됩니다.

지원 대상~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/Varnan-Tech/opendirectory/tree/main/skills/cold-email-verifier

즐겨 사용하는 AI에게 물어보기

이 에이전트 스킬이 미리 로드된 새 채팅을 엽니다.

문서

Cold Email Verifier and Guesser (공개)은(는) 무엇을 하나요?

개요

이 스킬은 리드 CSV(이름, 성, 회사명 포함)를 자동으로 처리하여 해당 회사의 도메인을 찾고, 전문적인 이메일 변형을 생성한 후 엄격하게 전달 가능성을 검증합니다.

이는 누락된 연락처 정보를 추측하고 실제 이메일을 확인하는 문제를 해결하기 위해 설계되었습니다.

이메일 추측 엔진

CSV에 이메일을 제공할 필요가 없습니다! CSV에 이름, 성, 회사명만 포함되어 있으면 스크립트가 자동으로:

  1. Clearbit API를 사용하여 회사의 공식 도메인을 조회합니다.
  2. 이름을 정리(구두점 제거)하고 가장 일반적인 3가지 이메일 형식을 생성합니다:

검증 방법 (엔진 선택)

이메일이 추측되면 스크립트가 이를 검증해야 합니다. 세 가지 방법을 지원합니다:

1. ValidEmail.co API (강력 추천)

절대 최고의 옵션. ValidEmail.co는 엔터프라이즈급 정확도를 제공하고, 엄격한 catch-all 서버를 우회하며, IP 평판을 자동으로 처리합니다.

  • 무료 티어: 가입 시 50회 무료 검증 크레딧을 제공하여 시작하기에 충분합니다!
  • 사용 방법: validemail.co에 방문하여 계정을 만들고 API 키를 받은 후 스크립트를 --mode validemail로 실행하세요.

2. Reacher 오픈소스 (자체 호스팅)

100% 무료 오픈소스 솔루션을 원한다면 AWS, GCP, Hetzner 같은 클라우드 제공업체에서 Reacher 백엔드를 직접 호스팅할 수 있습니다.

  • GitHub 저장소: reacherhq/check-if-email-exists
  • 중요: 클라우드 제공업체가 아웃바운드 Port 25를 열어야 합니다.
  • 사용 방법: Docker 컨테이너를 호스팅한 후 --mode reacher-http --reacher-url "http://<YOUR_SERVER_IP>:8080/v0/check_email"로 스크립트를 실행하세요.

3. Reacher 로컬 CLI (비추천 / 신뢰성 낮음)

로컬 노트북에서 Reacher CLI를 직접 실행할 수 있습니다.

  • 경고: 일반 ISP는 스팸 방지를 위해 Port 25를 전 세계적으로 차단합니다. 또한 주요 메일 서버(Microsoft, Google)는 가정용 Wi-Fi IP 주소의 SMTP 핸드셰이크를 자동으로 거부합니다.
  • 결과: 대량의 거짓 음성 및 타임아웃이 발생합니다. ValidEmail.co를 사용하세요.

실행 방법

먼저, 의존성을 설치하세요: pip install -r requirements.txt

ValidEmail.co 사용 (권장):

export VALIDEMAIL_API_KEY="your_api_key_here"
python scripts/email_verifier.py --input leads.csv --output verified_leads.csv --mode validemail

자체 호스팅 Reacher 사용:

python scripts/email_verifier.py --input leads.csv --output verified_leads.csv --mode reacher-http --reacher-url "http://your-server-ip:8080/v0/check_email"

CSV 형식 요구사항

입력 CSV는 다음 정확한 열 머리글(또는 특정 매핑)을 포함해야 합니다:

  • First Name
  • Last Name
  • Company Name
  • Domain (선택 사항 - 정확성을 위해 권장)

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

Varnan-Tech/opendirectory

Use when the user asks to generate a blog cover image, thumbnail, or article header. Automatically uses modern typography, brand logos, and Google Search grounding to create beautiful 16:9 images with Gemini 3.1 Flash Image Preview.

Varnan-Tech/opendirectory

World-class brand strategist and naming expert. Uses an interrogation-led discovery phase to extract your brand's DNA, then applies scientific naming frameworks (Phonosemantics) and automated multi-TLD domain checking.

Varnan-Tech/opendirectory

Use when the user asks to generate or update a project's CLAUDE or AGENTS context file from a codebase scan. Writes a focused file under 100 lines containing only the non-obvious build commands, conventions, and gotchas Claude Code needs.

Varnan-Tech/opendirectory

Competitive intelligence orchestrator tracking companies across 8+ platforms (GitHub, Twitter, Reddit, HN, PH, YC Jobs) with heat scores and AI briefings.

Varnan-Tech/opendirectory

Give it your product URL or description. It finds your top 5 competitors, runs three-track PR research across all of them (editorial, podcasts, communities), identifies which channels appear most frequently, looks up the journalist or host for each, and returns a tiered outreach list with story angles and ready-to-send cold pitch drafts tailored to your product. Use when asked to find PR opportunities, discover where competitors got featured, build a media outreach list, find which journalists cover my space, or get pitch templates for press coverage.

Varnan-Tech/opendirectory

Generate high-converting, deep-dive growth case studies in MDX format. Use this skill when asked to write a case study or blog post about a company's growth, tech stack, or product-led strategy. It handles the full pipeline (researching the company via Tavily, generating a 16:9 cover image, quality checking the draft, uploading assets to cloud storage, and pushing directly to the target repository).

Varnan-Tech/opendirectory

Scans your project for outdated npm, pip, Cargo, Go, or Ruby packages. Runs a CVE security audit. Fetches changelogs, summarizes breaking changes with Gemini, and opens one PR per risk group (patch, minor, major). Includes Diagnosis Mode for install conflicts. Use when asked to update dependencies, check for outdated packages, open dependency PRs, scan for package updates, audit for CVEs, or flag breaking changes in upgrades. Trigger when a user says "check for outdated packages", "update my dependencies", "open PRs for dependency updates", "scan for CVEs", or "which packages need upgrading".

Varnan-Tech/opendirectory

Generates and updates README.md and API reference docs by reading your codebase's functions, routes, types, schemas, and architecture. Uses graphify to build a knowledge graph first, then writes accurate docs from it. Use when asked to write docs, generate a README, document an API, update stale docs, create an API reference from code, add an architecture section, or document a project in any language. Trigger when a user says their docs are missing, outdated, or wants to document their codebase without writing it manually.

Varnan-Tech/opendirectory

Evaluates expired domain candidates against a target niche, scores them by topical relevance, historical activity level, and history cleanliness, then outputs a ranked shortlist with explainable reasoning and risk flags.

Varnan-Tech/opendirectory

Brutally honest developer-experience audit for a GitHub repo. Scores 10 DX dimensions (time-to-first-success, README clarity, visual proof, install, quick-start, docs, examples, community, trust, marketing), writes a shareable roast in the requested tone (brutal/honest/kind), produces a prioritized action plan ranked by impact × effort, and sketches an ideal README. Trigger when user says "roast my repo", "audit my README", "dx audit", "developer experience review", "score my GitHub project", "before launch checklist", or "make my repo shareable".

Varnan-Tech/opendirectory

Drafts and designs a complete HTML email newsletter from a topic or content brief. Outputs paste-ready HTML for Loops, Mailchimp, Beehiiv, Resend, or any standard email platform. Includes subject line options and plain-text fallback. Trigger when a user says "write a newsletter", "draft an email newsletter", "create an HTML email", "design an email for my subscribers", or "write a newsletter about [topic]".

Varnan-Tech/opendirectory

Takes a GitHub PR URL or the current branch and writes a plain-English explanation of what it does and why, then posts it as a PR comment. Use when asked to explain a PR, summarize a pull request, write a plain-English description of a PR, add a summary comment to a PR, or understand what a PR changes. Trigger when a user says "explain this PR", "summarize this pull request", "what does this PR do", "add a comment explaining the PR", or shares a GitHub PR URL and asks what it does.

Varnan-Tech/opendirectory

Audit how often LLMs recommend your brand vs competitors and generate a GEO action plan.

Varnan-Tech/opendirectory

Takes a competitor's public GitHub repo URL, fetches their open issues via the GitHub REST API, filters noise locally, clusters issues into 6 demand categories, computes a demand score per issue and per cluster, and outputs a ranked demand gap report with a GTM messaging brief. Use when asked to scan a competitor's GitHub issues, find what their users are begging for, turn GitHub complaints into product positioning, identify competitor feature gaps, or generate messaging from real user demand. Trigger when a user says "scan competitor issues", "what are users asking for on X repo", "find demand gaps in Y", "turn GitHub issues into messaging", or "what should I build based on competitor complaints".

Varnan-Tech/opendirectory

Find recurring confusion in your repo's GitHub Discussions, rank it by urgency, and draft the actual docs fixes and content angles — with verbatim community quotes and source links as evidence.

Varnan-Tech/opendirectory

SEO keyword research workflow for blog generation using Google Trends data. Use when writing blog posts, planning content calendars, or optimizing articles for search engines. Finds breakout keywords, builds content structure, and generates SEO-optimized blog outlines targeting tech and developer audiences.

Varnan-Tech/opendirectory

Generates a professionally designed case study PDF for B2B SaaS sales and marketing. Supports 7 page layouts, 9 style presets, 1-4 page output. Trigger when user says "create a case study", "write a customer story", "make a case study PDF", "design a success story", "turn this customer win into a PDF".

Varnan-Tech/opendirectory

Generates data visualization charts (bar, line, area, pie, doughnut, scatter, radar, treemap) as PNG using Apache ECharts v6. 1080×1080px default, 5 style presets, highlight annotations. Trigger when user says "create a chart", "visualize data", "make a bar chart", "line graph", "pie chart", "data visualization", "chart this data", "plot", "graph", or "visualize these numbers".

Varnan-Tech/opendirectory

Creates professionally designed B2B SaaS e-books in HTML + CSS, exported as print-ready PDF. 3–10 pages, 9 style presets, 11 page layout types. Trigger when user says "create an ebook", "design a lead magnet", "make a PDF guide", "build a gated content piece", "write a B2B ebook", "design a white paper", "create a nurture asset", or "make a PDF report".

Varnan-Tech/opendirectory

Fetches low-star App Store and Google Play reviews, clusters them into broken-promise patterns, and generates a ranked copy brief with positioning opportunities.

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