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Supabase Auth errorSupabase Auth: hook_timeout

hook_timeout is the Supabase Auth error for an Auth Hook that did not answer within its time limit. Supabase gives Postgres hooks 2 seconds and expects HTTP hooks to finish in 5 seconds, so a slow query or a slow outside API in the hook fails the sign-in, token or email step it runs in.

Short answer

Find which hook runs at that step, such as Custom Access Token, Send Email or Send SMS, and time it. Keep the hook to quick lookups, index the tables it reads, and move slow work such as outside API calls out of the hook or behind a queue.

Rather not fix it yourself? App Fix Ticket starts with a fixed-price diagnosis, then a fixed price for the fix before any fix work.

Why the Auth Hook timed out, and the fix

  1. 01

    A Postgres hook runs a slow query

    “Postgres Hooks have 2 seconds to complete processing while HTTP Hooks should complete in 5 seconds.” Supabase docs, Auth Hooks

    A Custom Access Token hook that joins large tables, or reads a table without an index, can take longer than 2 seconds. Add the index, select only the columns the claims need, and test the function with EXPLAIN ANALYZE.

  2. 02

    An HTTP hook waits on an outside service

    “Unable to reach hook within maximum time allocated.” Supabase docs, Auth error codes (hook_timeout)

    A Send Email or Send SMS hook that calls a provider and waits for it can pass 5 seconds when the provider is slow. Return quickly from the hook, and set your own short timeout on the outbound call so it fails clearly.

  3. 03

    The hook endpoint is cold or unreachable

    “Unable to reach hook after maximum number of retries.” Supabase docs, Auth error codes (hook_timeout_after_retry)

    An Edge Function or server that starts slowly can miss the limit on every try, and a wrong URL means the hook is not reached at all. Check the hook URL in the Auth Hooks settings and the endpoint’s own logs. When it fails after retries, the error is hook_timeout_after_retry.

  4. 04

    The hook does too much in one step

    Also check: Supabase runs hooks in a transaction and limits how long they run so sign-in is not delayed. Logging, analytics or extra writes belong in a trigger or a background job, not in the hook.

Checked against the vendor’s docs on : Supabase docs: Auth Hooks; Supabase docs: Auth error codes.

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Related: Supabase Edge Function timeout · Supabase Edge Function WORKER_LIMIT · Supabase SMS send failed · Supabase statement timeout

Questions

More on this error

Can I raise the hook time limit?

The Auth Hooks page lists 2 seconds for Postgres hooks and 5 seconds for HTTP hooks and gives no setting to change them, so make the hook faster instead.

Is a hook that returns an error the same thing?

No. A hook that returns an error object sends that error to your app; hook_timeout means the hook did not answer in time at all.

Can you fix it for me?

If one bug is the whole problem, the App Fix Ticket covers it: a written diagnosis first, then the fix. If the app has more going on, the Launch Check is a written check of the whole app. Each issue found is rated critical, high, medium or low, with where it is and how it was confirmed. No issues worth fixing, no charge. If the Launch Check finds nothing rated medium or higher, Simon refunds the full $450. You keep the report either way. This applies to the first 10 Launch Checks bought after October 30, 2026.

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