# API Migration from DataValidation

Learn how to migrate from the DataValidation API to Emailable.

The DataValidation API has been fully deprecated, and all users must migrate to [Emailable's API](https://emailable.com/docs/api).

## Major Differences

### Single Verification Response

The DataValidation API used a grade field that was far less comprehensive than Emailable's response. Below is a basic breakdown of how a DataValidation verification <u>grade</u> field would compare to Emailable's <u>state</u> field.


``` 
A/A+: Deliverable
B: Risky
D: Unknown
F: Undeliverable
```

Additionally, Emailable's API provides you with many more fields, allowing you to filter your data more precisely. View the full documentation [here](https://emailable.com/docs/api#verify-an-email).

### Billing

Verifications graded a D were billed through the DataValidation API. Using the Emailable API, these requests are considered Unknown and therefore will be refunded.