Apollo API

Searches and retrieves contact records from Apollo's proprietary database of 275M+ verified contacts using multi-field filtering (name, email, company, title, location, industry, seniority level, technologies used). The API returns structured contact objects with enriched data including verified email addresses, phone numbers, LinkedIn profiles, and employment history. Search results are paginated and support boolean operators for complex query construction.

Retrieves and enriches company records from Apollo's database of 73M+ companies with structured data including company size, revenue, funding stage, technology stack, industry classification, growth metrics, and organizational hierarchy. The API returns company profiles linked to contact records, enabling sales teams to understand account-level context and buying signals. Enrichment includes technographic data (tools and platforms used) and firmographic data (headcount, funding, growth rate).

Validates email addresses against Apollo's database of verified contacts and performs real-time email verification using SMTP validation, domain checks, and pattern matching to determine deliverability. The API returns a confidence score and validation status (valid, invalid, unknown) along with metadata about the email source (work email, personal, etc.). Batch verification is supported for bulk email list cleaning and validation.

Automates multi-step email sequences (campaigns) with conditional logic, personalization, and timing controls. The API enables creation of sequences with multiple steps, delays between steps, conditional branching based on recipient engagement (opens, clicks, replies), and dynamic personalization using contact and company data. Sequences can be triggered manually or automatically based on list membership or CRM events. The system tracks engagement metrics (open rates, click rates, reply rates) and provides webhook callbacks for integration with external systems.

Enables bulk import of contact and company data into Apollo's platform via CSV upload or API batch endpoints, with automatic deduplication, enrichment, and CRM synchronization. The API supports mapping custom CSV columns to Apollo contact/company fields, automatic matching against existing Apollo records, and bidirectional sync with CRM systems (Salesforce, HubSpot, Pipedrive). Import jobs are processed asynchronously with webhook notifications on completion and error reporting for failed records.

Provides webhook callbacks and event streaming for sequence execution, engagement tracking, and contact/company data changes. The API supports configurable webhooks for events (email sent, opened, clicked, replied, sequence completed) with retry logic and signature verification. Events are delivered in real-time or near-real-time (typically <5 seconds) and include full context (contact, company, sequence, engagement details). Supports filtering webhooks by event type and contact/company attributes.

Exports contact and company data from Apollo in multiple formats (CSV, JSON, Parquet) with flexible filtering, sorting, and field selection. The API supports scheduled exports (daily, weekly, monthly) to cloud storage (S3, Google Cloud Storage) or email delivery, and provides built-in reporting views (contact lists, company lists, engagement metrics, sequence performance). Exports can be filtered by contact attributes (title, seniority, industry), company attributes (size, revenue, funding), or engagement metrics (opens, clicks, replies).

Provides native integrations with major CRM platforms (Salesforce, HubSpot, Pipedrive) via OAuth authentication and bidirectional data sync. The integration automatically syncs Apollo contact and company data to CRM records, maps Apollo fields to CRM custom fields, and supports two-way sync (CRM updates → Apollo and Apollo updates → CRM). Integration includes native UI extensions (sidebar, modal) for viewing Apollo data within CRM interface and triggering Apollo actions (add to sequence, enrich contact) from CRM.