Failures and edge cases

com.roblox.client · target ABI x86_64 · status page

Every non-200 this API produces, and what to do about it. Errors are JSON and always carry a stable error slug — branch on that, never on the prose in message.

{ "error": "not_stored", "message": "2.734.612 is tracked but no copy of it is stored" }

Status and slug	Meaning and response
`400 unsupported_abi`	You asked for an ABI this tracker does not follow. It tracks `x86_64` only, and refuses rather than returning a build that will not install. Fix the request.
`400 bad_version`	The version in the path is not shaped like `2.734.917` (or the word `latest`). Nothing was looked up.
`401 unauthorized`	This deployment requires a token and yours was missing or wrong. Not retryable.
`404 unknown_version`	A well-formed version this tracker has never seen. Usually a typo, or a build older than its history.
`404 not_stored`	Known version, no copy kept — normally because it was pruned, or because it shipped no `x86_64` artifact and was never worth archiving. Call `/api/v1/android/files` and pick something that exists.
`404 not_found`	No such route. Check the path against Endpoints.
`503 no_installable_build`	Nothing carrying `x86_64` has been confirmed yet — a fresh deployment before its first full cycle, or a genuine run of arm-only releases. Keep whatever you have installed and retry later.
`503 archive_disabled`	This deployment stores no files, so downloads cannot work at all. Metadata endpoints still answer. An operator decision, not a fault.
`502 resolution_failed`	The upstream mirror could not be reached while resolving a URL. Transient. Retry with backoff.
`500 internal_error`	A bug here. Retry once; if it persists, tell the operator which URL did it.

States that look like errors and are not

installable: false on the current version. Roblox shipped a build with no x86_64 library. Correct behaviour is to stay on the older installable build, which is what /api/v1/android/current returns, with heldBack explaining it.
version: null from /api/v1/android/version. No poll has completed yet. Wait one cycle (60s).
An empty files array. Nothing archived yet. It fills in once a build is confirmed installable and copied.
sha256: "". Unknown — not zero, and not failed. Treat as unpinned.

Retrying

Retry 502, 503 and network failures with exponential backoff — a few seconds, then a minute, then give up for this cycle and keep the version you have. Do not retry 400, 401 or 404; nothing about them will change on a second attempt.

A download that dies mid-transfer is worth retrying immediately: the redirect target supports range requests, so curl -C - resumes rather than starting over.

Is the server itself alright?

If answers look stale, check https://robloxandriod.com/healthz. It returns 503 when the poll loop has stalled, which is the difference between "Roblox has not shipped anything" and "this tracker stopped looking".

Stability of this API

Paths are versioned. /api/v1/ keeps its current shape.
Fields may be added without warning. Ignore unknown ones rather than failing.
Field removals or meaning changes go to /api/v2/.
Timestamps are ISO 8601 UTC; *EpochMs variants are milliseconds.