lessie-skill MCP — ユースケース, インストール & ライブデモ

なぜ使うのか

主な機能

People search with filters: titles, companies, locations, domains
Contact enrichment returning verified emails and phones
Company research: industry, funding, tech stack, hiring signals
Integrated email send/manage across Gmail, Outlook, other providers
Delivered via CLI (@lessie/cli) or MCP server across Claude Code / Cursor / Codex

ライブデモ

実際の動作

lessie-skill.replay ▶ 準備完了

0/0

インストール

クライアントを選択

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "lessie-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/LessieAI/lessie-skill",
        "~/.claude/skills/lessie-skill"
      ],
      "_inferred": true
    }
  }
}

Claude Desktop → Settings → Developer → Edit Config を開く。保存後、アプリを再起動。

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "lessie-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/LessieAI/lessie-skill",
        "~/.claude/skills/lessie-skill"
      ],
      "_inferred": true
    }
  }
}

Cursor は Claude Desktop と同じ mcpServers スキーマを使用。プロジェクト設定はグローバルより優先。

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "lessie-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/LessieAI/lessie-skill",
        "~/.claude/skills/lessie-skill"
      ],
      "_inferred": true
    }
  }
}

Cline サイドバーの MCP Servers アイコンをクリックし、"Edit Configuration" を選択。

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "lessie-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/LessieAI/lessie-skill",
        "~/.claude/skills/lessie-skill"
      ],
      "_inferred": true
    }
  }
}

Claude Desktop と同じ形式。Windsurf を再起動して反映。

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "lessie-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/LessieAI/lessie-skill",
        "~/.claude/skills/lessie-skill"
      ]
    }
  ]
}

Continue はマップではなくサーバーオブジェクトの配列を使用。

~/.config/zed/settings.json

{
  "context_servers": {
    "lessie-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/LessieAI/lessie-skill",
          "~/.claude/skills/lessie-skill"
        ]
      }
    }
  }
}

context_servers に追加。保存時に Zed がホットリロード。

claude mcp add lessie-skill -- git clone https://github.com/LessieAI/lessie-skill ~/.claude/skills/lessie-skill

ワンライナー。claude mcp list で確認、claude mcp remove で削除。

ユースケース

実用的な使い方： lessie-skill

Build a B2B prospect list for a sales sequence

👤 Founders, SDRs, agency owners running targeted outreach ⏱ ~45 min intermediate

使うタイミング： You need 50 qualified contacts for a specific campaign without a Sales Navigator seat.

前提条件

Skill cloned + Lessie account — git clone https://github.com/LessieAI/lessie-skill ~/.claude/skills/lessie-skill; sign up at lessie for API key

フロー

Define the ICP

Use lessie-skill — find Engineering Managers at SaaS companies, 50-500 employees, using Stripe, HQ in EU.✓ コピーしました

→ Lessie find-people call with filter JSON, not generic search
Enrich contacts

Enrich the top 25 with verified email.✓ コピーしました

→ Emails plus validation status returned
Draft personalized emails

Draft individualized openers using each person's recent company news. No spam phrases.✓ コピーしました

→ Per-contact personalization, not copy-paste

結果： A usable prospect list with personalized opener drafts.

注意点

Treating 'verified' email as guaranteed deliverable — Warm your sending domain and monitor bounces — verification is probabilistic

組み合わせ： github

Source engineering candidates for a specific role

👤 Recruiters and hiring managers on small teams ⏱ ~30 min intermediate

使うタイミング： You need a shortlist before pinging a recruiter.

フロー

Search

lessie-skill — find Senior Rust engineers in Berlin or remote EU, with distributed systems background.✓ コピーしました

→ Targeted list with signals (seniority, stack evidence)
Qualify

For the top 10, summarize each in two sentences: strongest fit signal + one reservation.✓ コピーしました

→ Honest summaries, not just enrichment fields

結果： A human-readable shortlist ready for outreach.

組み合わせ

他のMCPと組み合わせて10倍の力を

lessie-skill + github

Research GitHub activity of candidates alongside Lessie profile data

For the Rust shortlist, cross-reference each person's GitHub contributions to Rust projects.✓ コピーしました

lessie-skill + claude-content-writer-skill

Draft personalized outreach sequences in your brand voice

Using claude-content-writer voice profile, draft 3-email sequences for the top 10 prospects.✓ コピーしました

ツール

このMCPが提供する機能

ツール	入力	呼び出すタイミング	コスト
find-people	title / company / domain / location filters	Starting from ICP filters	Lessie plan-dependent
enrich-contact	person id or profile	Shortlist narrowed and ready to contact	Per-enrichment credit
find-company	company name or domain + optional filters	Account research before outreach	Plan-dependent
send-email	Gmail/Outlook account + to/subject/body	Only after you review drafts — don't auto-send at scale	Uses your own mailbox

コストと制限

運用コスト

APIクォータ: Depends on Lessie plan — the skill itself is just the prompt wrapper
呼び出しあたりのトークン: Moderate; responses can be large when listing 50+ contacts
金額: Free — skills are local files. Lessie's data API is paid; consult current plans.
ヒント: Filter aggressively before enrichment; every enrichment call costs credits.

セキュリティ

権限、シークレット、影響範囲

認証情報の保管： Lessie API key in env var; Gmail/Outlook via OAuth if you use send-email

データ送信先： Queries go to Lessie's API. Email sending goes via your provider.

Contact enrichment must comply with GDPR / CAN-SPAM / local laws — Lessie provides data, compliance is on you.
Don't automate bulk sends without warming; volume without domain reputation = spam folder.

トラブルシューティング

よくあるエラーと対処法

Skill not invoked — Claude offers generic LinkedIn advice

Say 'use lessie-skill' explicitly.

確認： ls ~/.claude/skills/lessie-skill/SKILL.md

SKILL.md frontmatter wrong

Re-clone; description drives activation.

確認： head ~/.claude/skills/lessie-skill/SKILL.md

Wrong trigger keywords — enrichment runs before filtering narrows the list

Explicitly: 'first find-people, then I'll pick who to enrich'.

代替案

lessie-skill 他との比較

代替案	代わりに使う場面	トレードオフ
Apollo.io / Clay	You want a full GTM suite with sequencing tools	Much heavier platforms; pricier
LinkedIn Sales Navigator	LinkedIn-native prospecting with InMail	Expensive, no agent integration

その他

リソース

📖 GitHub の公式 README を読む

🐙 オープンな issue を見る

🔍 400以上のMCPサーバーとSkillsを見る