# A Note on Data Quality Tiers SalesIntel exposes two tiers of data via our APIs - human-verified and machine-verified. Human-verified data has each data point assessed by our researches. Machine-verified data is based on layering signals and data science. Both tiers of data are valuable for different purposes. Please connect with the SalesIntel team about your use case and we can advise when to use what data. All of the APIs allow for filtering of quality tiers based on the `verified` parameter, which can be helpful based on what you are trying to accomplish and can help eliminate overlap or duplication between records. Your contract may support different rates between different tiers of data, as well. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://developer.salesintel.io/salesintel-api-documentation/getting-started-with-salesintel-apis/use-cases/a-note-on-data-quality-tiers.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.