--- updatedAt: 2026-08-25T22:11:15.000Z agentTools: projectIndex: https://docs.atdata.com/llms.txt --- # Overview AtData leads the market in email address intelligence, offering precise, thorough, and privacy-conscious data solutions focused on emails. With over two decades of historical email and postal data, AtData handles billions of monthly signals through an exclusive network. The AtData system authenticates and verifies clients' first party customer data, empowering them to create valuable customer profiles, evaluate risks, and enhance customer engagement, sales, and loyalty. ## AtData's APIs AtData APIs enable you to enhance data quality and depth by quickly and securely verifying email addresses and matching demographics and behavioral data to your customer list in real-time. {`

SafeToSend API

AtData's SafeToSend Email Verification & Hygiene solution.

Identity Matching API

Use one point of contact to find an alternate point of contact.

Demographics API

Query demographic and behavioral data for a single email or postal address.

List API

Run files of up to 1,000,000 records through SafeToSend, Email Validation, Demographiics, or Identity Matching.
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> 📘 Security and Authentication > > All requests to our APIs must be made using [HTTPS](https://en.wikipedia.org/wiki/HTTPS) and require an [API key](https://docs.atdata.com/reference/authentication). ## What's next? To start using the AtData APIs, read [Getting Started](https://docs.atdata.com/reference/getting-started). This guide covers everything you need to use the AtData API, from creating an account and accessing your API key to exploring the available endpoints. > 👍 Contact AtData > > If you have questions or care to make suggestions use the [form or contact information here](https://atdata.com/contact-us/). We’re here to help so please don’t be shy about contacting us. {` `}