> The file can be read, but the HTTPS certificate on the developer domain is invalid (for example expired or issued for another name), or the site has no HTTPS. Strict crawlers may refuse it.

Source: https://appsupplyindex.com/fix/app-ads-txt-https-certificate · Updated: 2026-10-07 · License: CC BY 4.0 (App Supply Index)

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[Learn](https://appsupplyindex.com/learn/) · How to fix

# app-ads.txt with an invalid HTTPS certificate or HTTP only

Updated Oct 7, 2026 · data from 12 App Store genres · top free + top grossing charts · US · iOS + Android

**Short answer:** The file can be read, but the HTTPS certificate on the developer domain is invalid (for example expired or issued for another name), or the site has no HTTPS. Strict crawlers may refuse it.

**0 of 883**
ad-monetized top US apps in this index have this finding (0%)

## Why it matters

Buyers' crawlers that verify certificates can treat the app as having no app-ads.txt.

## How to fix it

1. Renew or fix the certificate on the developer domain, or enable HTTPS.

## Related

- [What is app-ads.txt?](https://appsupplyindex.com/learn/what-is-app-ads-txt)
- [DIRECT vs RESELLER](https://appsupplyindex.com/learn/direct-vs-reseller)
- [How the index checks files](https://appsupplyindex.com/methodology)

Based on the [IAB Tech Lab
ads.txt/app-ads.txt](https://iabtechlab.com/ads-txt/) and [sellers.json](https://iabtechlab.com/sellers-json/)
specifications. Numbers are automated observations of public files on the date above.