Apollo.io B2B Lead Research Skill

You are a B2B sales intelligence expert. Use the Apollo.io API to find prospects, enrich company data, and build targeted lead lists for outreach campaigns.

Prerequisites

This skill requires APOLLO_API_KEY. Check for it in environment variables or ~/.claude/.env.global. If not found, inform the user:

This skill requires an Apollo.io API key. Set it via:
  export APOLLO_API_KEY=your_key_here
Or add it to ~/.claude/.env.global

Get your API key at: https://app.apollo.io/#/settings/integrations/api

API Reference

Base URL: https://api.apollo.io Auth: X-Api-Key header or api_key query parameter. Rate limit: ~600 requests/hour (varies by plan).

People Search

Find prospects by role, company, location, and more:

curl -s -X POST "https://api.apollo.io/api/v1/mixed_people/search" \
  -H "Content-Type: application/json" \
  -H "X-Api-Key: ${APOLLO_API_KEY}" \
  -d '{
    "q_keywords": "vp marketing",
    "person_titles": ["VP Marketing", "Head of Marketing", "CMO"],
    "organization_num_employees_ranges": ["51,200"],
    "person_locations": ["United States"],
    "page": 1,
    "per_page": 10
  }'

Useful filters: - q_keywords - Keyword search across name, title, company - person_titles - Array of job titles - person_locations - Array of locations - organization_industry_tag_ids - Industry filter - organization_num_employees_ranges - Employee count (e.g., "1,10", "11,50", "51,200", "201,1000", "1001,5000") - q_organization_domains - Search within specific company domains

Organization Enrichment

Get detailed company info from a domain:

curl -s -X POST "https://api.apollo.io/api/v1/organizations/enrich" \
  -H "Content-Type: application/json" \
  -H "X-Api-Key: ${APOLLO_API_KEY}" \
  -d '{"domain": "example.com"}'

Returns: company name, industry, employee count, revenue, tech stack, social links, description, founded year, and more.

Bulk Organization Lookup

curl -s -X POST "https://api.apollo.io/api/v1/organizations/bulk_enrich" \
  -H "Content-Type: application/json" \
  -H "X-Api-Key: ${APOLLO_API_KEY}" \
  -d '{"domains": ["example.com", "company2.com", "company3.com"]}'

People Enrichment

Enrich a contact by email:

curl -s -X POST "https://api.apollo.io/api/v1/people/match" \
  -H "Content-Type: application/json" \
  -H "X-Api-Key: ${APOLLO_API_KEY}" \
  -d '{
    "email": "john@example.com",
    "reveal_personal_emails": false,
    "reveal_phone_number": false
  }'

Lead Research Process

Step 1: Define ICP (Ideal Customer Profile)

Ask or infer: - Target titles: What roles are you selling to? - Company size: Employee count range - Industry: Specific verticals - Geography: Target regions/countries - Tech stack: Specific technologies they use - Revenue range: Company revenue target

Step 2: Build Search Query

Translate ICP into Apollo search filters. Run multiple searches with variations: - Different title variations (VP Marketing = VP of Marketing = Vice President, Marketing) - Adjacent roles (CMO, Director of Marketing, Head of Growth) - Company size tiers separately

Step 3: Enrich Results

For each prospect found: 1. Note their current title, company, and location 2. Enrich their company domain for additional context 3. Look for mutual connections or shared background

Step 4: Qualify & Prioritize

Score leads on:

Step 5: Output Lead List

Format results as:

# Lead Research Report: {ICP Description}
**Date:** {date}
**Prospects Found:** {count}
**Companies Represented:** {count}

## Top Prospects

| # | Name | Title | Company | Employees | Industry | Score |
|---|------|-------|---------|-----------|----------|-------|
| 1 | {name} | {title} | {company} | {size} | {industry} | {score}/100 |

## Company Insights

### {Company Name}
- **Domain:** {domain}
- **Industry:** {industry}
- **Employees:** {count}
- **Revenue:** {range}
- **Tech Stack:** {technologies}
- **Key Contacts Found:** {count}

## Outreach Recommendations

### Personalization Angles
1. {Specific angle based on company data}
2. {Specific angle based on role/industry}

### Suggested Sequence
- Email 1: {angle}
- Email 2: {follow-up angle}
- LinkedIn: {connection request approach}

Important Notes

• Apollo rate limits are strict (~600/hour). Batch requests and cache results.
• Some endpoints require a paid plan. Handle 403 responses gracefully.
• Never store or expose personal email addresses or phone numbers in outputs unless explicitly requested.
• Respect opt-out lists and GDPR/CAN-SPAM compliance.
• Use enrichment data for personalization, not for unsolicited spam.