Issue with Roblox Multiget/Thumbnails API – Missing Data for Specific Games

[Altimox]

Dear Roblox Team,

I’m a full-stack developer specializing in creating Roblox-related websites for large studios. Recently, several of my clients have reported issues with their websites not functioning correctly.

After debugging, I discovered that the issue is related to the Roblox Multiget/Thumbnails APIs. Specifically, these APIs are returning an “Unknown error” and no thumbnail data for certain games.

Attached are screenshots demonstrating the problem with two well-known games:

1. Grow a Garden
2. Baddies

I would appreciate any assistance or clarification you can provide regarding this issue.

A private message is associated with this bug report

[Hooksmith]

Hey there, which endpoint is this about, can you share the URL? (or a CURL example reproducing the error ideally – please mask any sensitive values) This will help us triage the issue internally. Thanks!

[Altimox]

Hi Hooksmith,

Thanks for the quick response—much appreciated!

The issue concerns the /v1/games/multiget/thumbnails endpoint. Below are the URLs for the two games’ thumbnail API calls:

Grow a Garden:

https://thumbnails.roblox.com/v1/games/multiget/thumbnails?universeIds=7436755782&countPerUniverse=1&defaults=true&size=768x432&format=Webp&isCircular=false

Baddies:

https://thumbnails.roblox.com/v1/games/multiget/thumbnails?universeIds=3990106548&countPerUniverse=1&defaults=true&size=768x432&format=Webp&isCircular=false

[bvetterdays (roman)]

Working for me:

[Altimox]

The Grow a Garden one is the example I provided that is working.

Please try the Baddies one, which isn’t working.

https://thumbnails.roblox.com/v1/games/multiget/thumbnails?universeIds=3990106548&countPerUniverse=1&defaults=true&size=768x432&format=Webp&isCircular=false

[BLRbx88 (BLRbx)]

@Altimox

https://thumbnails.roblox.com/v1/games/multiget/thumbnails?universeIds=3990106548&countPerUniverse=1&defaults=true&size=768x432&format=Webp&isCircular=false

Hi,
Thanks for reporting this issue. The URL you sent earlier is now working on my end. Please let us know if you’re still experiencing this issue.

[Altimox]

Hey BLRbx! When I reported this error, it was fixed within a few days. I believe the staff member @Hooksmith reported it to the Roblox team, and they already resolved it. To confirm again, everything is working fine now.