apollo-migration-deep-dive

# Apollo Migration Deep Dive ## Current State !`npm list 2>/dev/null | head -10` ## Overview Migrate contact and company data into Apollo.io from other CRMs (Salesforce, HubSpot) or CSV sources. Uses Apollo's **Contacts API** for creating/updating contacts and **Bulk Create Contacts** endpoint for high-throughput imports (up to 100 contacts per call). Covers field mapping, assessment, batch processing, reconciliation, and rollback. ## Prerequisites - Apollo master API key (Contacts API requires master key) - Node.js 18+ - Source CRM export in CSV or JSON format ## Instructions ### Step 1: Define Field Mappings ```typescript // src/migration/field-map.ts interface FieldMapping { source: string; target: string; // Apollo Contacts API field transform?: (v: any) => any; required: boolean; } // Salesforce -> Apollo const salesforceMap: FieldMapping[] = [ { source: 'FirstName', target: 'first_name', required: true }, { source: 'LastName', target: 'last_name', required: true }, { source: 'Email', target: 'email', required: true }, { source: 'Title', target: 'title', required: false }, { source: 'Phone', target: 'phone_number', required: false }, { source: 'Company', target: 'organization_name', required: false }, { source: 'Website', target: 'website_url', required: false, transform: (url: string) => url?.startsWith('http') ? url : `https://${url}` }, { source: 'LinkedIn', target: 'linkedin_url', required: false }, ]; // HubSpot -> Apollo co...