Hi there,
As of recently none of the web APIs have documentation pages, originally it showed you what APIs there are under each subdomain and a way to test them, an example below:
Today when viewing them it shows either a 404 page or a JSON error saying
{'errors':[{'code':9009,'message':'No Service Found'}]}The current APIs that have no docs are:
| API Endpoints | Description |
|---|---|
| abtesting.roblox.com/docs | Endpoints for the A/B Testing framework |
| accountinformation.roblox.com/docs | All endpoints for accessing/modifying account information |
| accountsettings.roblox.com/docs | All endpoints for account/user settings |
| adconfiguration.roblox.com/docs | Roblox Ad Configuration related endpoints |
| ads.roblox.com/docs | Ads configuration endpoints |
| assetdelivery.roblox.com/docs | Serves asset content |
| Authentication Api | All endpoints that tamper with authentication sessions |
| avatar.roblox.com/docs | Endpoints relating to the customization of player avatars |
| badges.roblox.com/docs | Endpoints for badges and badge awards management |
| billing.roblox.com/docs | Real money transactions and interaction |
| catalog.roblox.com/docs | Catalog items browsing and searching. Content and user based catalog items recommendations |
| chat.roblox.com/docs | All chat and party related endpoints |
| clientsettings.roblox.com/docs | Used by various Roblox clients to retrieve configuration information |
| clientsettingscdn.roblox.com/docs | Used by various Roblox clients to retrieve configuration information |
| client-telemetry.roblox.com/docs | Handles client telemtry |
| contentstore.roblox.com/docs | ApiSite to front the TemporaryStore for files before uploading to S3 |
| contacts.roblox.com/docs | Contacts and userTag management |
| develop.roblox.com/docs | Game development configuration endpoints |
| economy.roblox.com/docs | Endpoints related to transactions and currency |
| economycreatorstats.roblox.com/docs | Roblox.EconomyCreatorStats.Api endpoints. |
| engagementpayouts.roblox.com/docs | For engagement-based payout information |
| ephemeralcounters.api.roblox.com/docs | Handles ephemeral counters |
| followings.roblox.com/docs | Establishes follow relationship between subscriber entities (users, groups, etc) and source entities (games, groups, assets, etc.) |
| friends.roblox.com/docs | Friends, followers, and contacts management |
| gameinternationalization.roblox.com/docs | Manages internationalization of games such as translating in game content. |
| gamejoin.roblox.com/docs | All endpoints around launching a game |
| gamepersistence.roblox.com/docs | Endpoints for the in-game datastore system for storing data for games |
| games.roblox.com/docs | All endpoints for game discovery, and details |
| groups.roblox.com/docs | Groups management |
| groupsmoderation.roblox.com/docs | Group Moderation |
| inventory.roblox.com/docs | All endpoints for viewing (but not granting) ownership of items |
| itemconfiguration.roblox.com/docs | Configure Items (bundles and avatar assets) |
| lms.roblox.com/docs | Status of the Latency Management Service |
| locale.roblox.com/docs | User locale management |
| localizationtables.roblox.com/docs | Handles managing of localization tables |
| metrics.roblox.com/docs | Record metrics across Roblox |
| notifications.roblox.com/docs | All notification stream endpoints |
| points.roblox.com/docs | The web Api for the in-game PointsService |
| premiumfeatures.roblox.com/docs | This API is for premium features and anything pertaining to account add ons |
| presence.roblox.com/docs | All endpoints for managing presence |
| privatemessages.roblox.com/docs | All messages page endpoints |
| publish.roblox.com/docs | All endpoints handling file uploads |
| realtime.roblox.com/docs | Purpose of API here |
| share.roblox.com/docs | Purpose of Api here |
| search.roblox.com/docs | Legacy item search endpoints. |
| textfilter.roblox.com/docs | High volume text filtering |
| thumbnails.roblox.com/docs | Endpoints for requesting thumbnails |
| thumbnailsresizer.roblox.com/docs | Validate and resize thumbnails to requested dimensions |
| trades.roblox.com/docs | Endpoints for trading collectible items |
| translationroles.roblox.com/docs | Manages translation roles of developers in game localization |
| translations.roblox.com/docs | Endpoints for requesting translations |
| twostepverification.roblox.com/docs | Platform interface for the two step verification system |
| usermoderation.roblox.com/docs | Endpoints for performing actions/operations related to User Moderation |
| users.roblox.com/docs | APIs for direct Roblox user information. |
| voice.roblox.com/docs | APIs for Voice calls |
Please rely on this new documentation page instead of the old documentation URLs since we cannot offer guarantees that the old URLs will stay available, including any variation (like the double slash workaround), for involved technical reasons.
While we do our best to 
We are looking into improvements to the new documentation pages, like having a way to download the openAPI JSON for each surface, and we are investigating what it would take to support “try out”-esque features on this page.