CRM and the public API
Same enrichment your app uses, from your CRM.
CRM and the public API
LeadHootz University
The public API uses bearer keys to enrich people and companies on the same credit pool as the app. Create a key under API access in the product, then call people/company enrich from your CRM or warehouse.
CRM connect (from campaign setup) is for teams who want lists and results flowing back into the system of record. See the API docs on this site for the customer-facing overview.