Hey! So sorry for the delay. It depends on the data provider. Clay is an aggregator/one access pass to 50+ data providers and their enrichment or data search services.Enrichments cost credits to run - you can see how much each one charges per search or result when you add them. The cost is established by the provider, and the green credit icon next to them. Some providers will even refund the credits if they don't find data, _some still charge even if they don't find anything because they consider that a cost for them too which is then transferred to Clay_.If you use your own API key we won't charge you credits for that enrichment provider. Check out our "What are Clay Credits?" page and this forecasting calculator. Hope this helps!