Clay team Quick question about waterfall enrichment billing for phone numbers.

Quick Answer

You get charged based on what the provider charges us. If a provider charges us for an API call (even if they don't return valid data), we charge you credits for that call. [[clay.com](https://www.clay.com/faq]) However, if the provider refunds us because they couldn't deliver valid data, we'll refund those credits back to you. [[clay.com](https://www.clay.com/faq/what-happens-if-one-of-your-providers-doesnt-return-valid-data]) In waterfalls, once a provider finds valid data, Clay stops there and doesn't check other providers - this saves credits. [[clay.com](https://www.clay.com/university/le