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It's frustrating when tools provide inconsistent metrics, especially when those metrics influence important decisions like purchasing a domain. The discrepancy between the MOZ API and the homepage might stem from data sync issues or differences in how they display information. The "NO DATA" on the homepage could indicate insufficient crawl history or indexing issues, while the API might be pulling outdated or limited data.

It's worth contacting MOZ support to clarify this, as they can provide insight into why this happens. Meanwhile, cross-referencing with other tools like Ahrefs or SEMrush is always a good practice to get a more holistic view. As someone who often collaborates with professionals like content writers Melbourne for domain projects, I understand how vital accurate data is for informed decisions. Hopefully, you can get to the bottom of this with MOZ's assistance!

@Skys said in MOZ API for domain authority:

I am using the MOZ API to check domain authority (DA). Recently, I noticed a discrepancy: the DA value retrieved via the API differs from the result on the MOZ homepage. Specifically, the API returns a DA of 10, while the homepage shows "NO DATA." Additionally, other services like Ahrefs report a DA of 0. I relied on the MOZ API's result when purchasing this domain and now feel misled. I would like to understand the exact reason for this inconsistency.

The discrepancy could be due to differences in how the MOZ API and homepage update or display data. The API might still show older data, while the homepage reflects a lack of indexed metrics. Ahrefs and MOZ use different methods to calculate metrics, which explains the "0" from Ahrefs. It’s best to contact MOZ support for clarification on your domain's DA.