Apollo.io

B2B prospecting and data enrichment platform with 210M+ contacts and 35M+ companies for sales intelligence.

Capabilities

Authentication

• Type: API Key
• Header: x-api-key: {api_key} or Authorization: Bearer {token}
• Get key: Settings > Integrations > API at https://app.apollo.io

Common Agent Operations

People Search

POST https://api.apollo.io/api/v1/mixed_people/api_search

{
  "person_titles": ["Sales Manager"],
  "person_locations": ["United States"],
  "organization_num_employees_ranges": ["1,100"],
  "page": 1
}

Person Enrichment

POST https://api.apollo.io/api/v1/people/match

{
  "first_name": "Tim",
  "last_name": "Zheng",
  "domain": "apollo.io"
}

Bulk People Enrichment

POST https://api.apollo.io/api/v1/people/bulk_match

{
  "details": [
    { "email": "[email protected]" },
    { "first_name": "Jane", "last_name": "Doe", "domain": "example.com" }
  ]
}

Organization Search

POST https://api.apollo.io/api/v1/mixed_companies/search

{
  "organization_locations": ["United States"],
  "organization_num_employees_ranges": ["1,100"],
  "page": 1
}

Organization Enrichment

POST https://api.apollo.io/api/v1/organizations/enrich

{
  "domain": "apollo.io"
}

Key Metrics

Person Data

• first_name, last_name - Name
• title - Job title
• email - Verified email
• linkedin_url - LinkedIn profile
• organization - Company details
• seniority - Seniority level
• departments - Department list

Organization Data

• name - Company name
• website_url - Website
• estimated_num_employees - Employee count
• industry - Industry
• annual_revenue - Revenue
• technologies - Tech stack
• funding_total - Total funding

Parameters

People Search

• person_titles - Array of job titles
• person_locations - Array of locations
• person_seniorities - Array: owner, founder, c_suite, partner, vp, head, director, manager, senior, entry
• organization_num_employees_ranges - Array of ranges (e.g., "1,100")
• organization_ids - Filter by Apollo org IDs
• page - Page number (default: 1)
• per_page - Results per page (default: 25, max: 100)

Person Enrichment

• email - Email address
• first_name + last_name + domain - Alternative lookup
• linkedin_url - LinkedIn URL
• reveal_personal_emails - Include personal emails
• reveal_phone_number - Include phone numbers

Organization Search

• organization_locations - Array of locations
• organization_num_employees_ranges - Employee count ranges
• organization_ids - Specific org IDs
• page - Page number

When to Use

• Building targeted prospect lists by role, seniority, and company size
• Enriching leads with verified contact info
• Finding decision-makers at target accounts
• Company research and firmographic analysis
• ABM campaign targeting
• Sales intelligence and outbound prospecting

Rate Limits

• Rate limits vary by plan
• Standard: 100 requests/minute for most endpoints
• Bulk enrichment: up to 10 people per request
• Search: max 50,000 records (100 per page, 500 pages)

Relevant Skills

• abm-strategy
• lead-enrichment
• lead-scoring
• cold-email
• competitor-alternatives