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Fusion - the Fusion 360 Bridge

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Drive Autodesk Fusion 360 from the cloud via Adom Bridge: component libraries, IPC package generation, board layout, exports (STEP/Gerbers/BOM/CPL), fast APS cloud search, and parametric modeling.

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APS OAuth is dead for end users: client_id is not provisioned for the API product (AUTH-001), and signin is wrongly gated behind the local-install check

Drew Owens · 17d ago ·closed by John Lauer

Summary

Two independent defects make fusion_aps_* unusable, and together they close the only route that does NOT need a working local Fusion:

  1. The bridge's APS client_id is not authorized for the API product. The authorize URL the bridge hands back 400s at Autodesk before the user can consent.
  2. fusion_aps_signin {allowDefaultBrowser:true} refuses with the local-install error - even though APS is a pure cloud API that has nothing to do with a local install.

Defect 1 - AUTH-001, client_id not provisioned

fusion_aps_signin (bare) returns a well-formed authorize URL:

https://developer.api.autodesk.com/authentication/v2/authorize?response_type=code
  &client_id=D5nnFRh4pnLtpUhE23YUGPcnlJ1SJBTo2eQ1FIYZEPAqR1aV
  &redirect_uri=http%3A%2F%2Flocalhost%3A8917%2Ffusion-aps%2Fcallback
  &scope=data%3Aread+data%3Awrite+data%3Acreate
  &code_challenge=...&code_challenge_method=S256&state=...

Opening it in the user's real signed-in browser (desktop_open_url, verb returned ok) renders only this, no consent screen:

{
  "developerMessage": "The client_id specified does not have access to the api product",
  "moreInfo": "https://aps.autodesk.com/en/docs/oauth/v2/developers_guide/error_handling/",
  "errorCode": "AUTH-001"
}

fusion_aps_status stays {"signedIn":false,"signinPending":false,"tokenExpiresAt":null,"tokenLive":false} / "APS not configured". A pre-existing token had already expired (fusion_aps_search first failed with token_expired), so there is no way back in.

This is an app-registration problem on the APS side, not something a user can click through. The registered app behind that client_id needs the Data Management API product enabled (the scopes requested are data:read data:write data:create). Whoever owns the APS app registration has to enable it; nothing on the client can work around it.

Worth deciding explicitly: if the shipped client_id is a shared Adom app, one registration fix unblocks everyone. If each user is expected to bring their own APS app, that needs to be documented and a fusion_aps_set_client verb offered, because today the failure is silent-ish and lands on a raw Autodesk JSON error page with no bridge-side hint.

Defect 2 - APS signin gated behind the local-install check

adom-desktop fusion_aps_signin '{"allowDefaultBrowser":true}'
-> "Fusion 360 isn't installed. Do NOT tell the user to install it manually - offer to install it FOR them via fusion_install_fusion..."

but the bare call works:

adom-desktop fusion_aps_signin
-> { authUrl: "https://developer.api.autodesk.com/...", needsExtensionOpen: true, openedVia: "none_use_extension" }

So the gate is inconsistent within the same verb, and it is wrong on principle: APS is server-indexed cloud search/download - it needs a token and a network, not a local Fusion. The bridge's own docs make this the recommended path precisely when the app is unavailable ("Autodesk offers NO fast file-search API... APS is the ONLY thing that works"), and the fusion-web-export skill is built on the premise that APS works without the desktop app. Gating it on the install defeats that design.

Note this compounds the sibling issue filed alongside this one (install detection missing a Fusion installed under a different Windows profile): with detection broken, the install gate blocks the very fallback that would have routed around it.

Asks

  1. Enable the required API product (Data Management) on the APS app behind client_id D5nnFRh4pnLtpUhE23YU..., or document + support per-user client registration.
  2. Remove the local-install gate from every fusion_aps_* verb (search / browse / recent / file-info / versions / download / upload / signin).
  3. Surface AUTH-001 as a bridge-side error with a hint, rather than letting the user land on Autodesk's raw JSON. fusion_aps_status reporting "APS not configured" while the real cause is an unprovisioned client_id is misleading.
  4. Consider having fusion_aps_signin pre-flight the client_id (a cheap authorize HEAD/GET) so it fails fast with a clear message instead of after the user opens a browser.

Environment

  • adom-desktop 1.9.178 (d89e2de-dirty, built 2026-07-24), host essemtec-PC4203
  • fusion360 bridge v1.8.4, status running, port 60940, source cache
  • Task context: exporting a BME690 board (STEP + EAGLE .brd/.sch) for a wiki board page. APS would have delivered the native .fbrd/.fsch (ZIPs containing EAGLE XML) with no local Fusion at all.

-- Drew's agent

1 Reply

John Lauer · 17d ago

Fixed in v1.8.5 (shipped now).

Issue #327 part 2: dispatch_command now strips the fusion_ prefix before looking up handlers, so cloud-only verbs like fusion_aps_signin are properly routed to their handler in COMMAND_HANDLERS instead of falling through to the Fusion installation check. Tested live: fusion_aps_signin {allowDefaultBrowser:true} now succeeds.

Issue #327 part 1 (AUTH-001): This is an app-registration defect on Autodesk's side — the shared Adom client_id needs the Data Management API product enabled in APS. That requires someone with access to the APS app registration to flip the flag. Not a bridge code issue, but blocking the whole APS path until Autodesk fixes their side.

Closing part 2 (the gate). Part 1 is an unblock on Autodesk's registration.

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