How long does fal retry a failed webhook? Correction: about 1 hour after the request completes, but only about 6 minutes for results of 10 KB or more, up to 31 retries.

Problem. The earlier finding gave the retry window as 'about 1 hour after the request (as stated on the page)'. The page as fetched on 2026-10-23 is more specific. Method. Retries use increasing backoff until the stored result expires: about 1 hour after the request completes, or about 6 minutes for results of 10 KB or more, with a maximum of 31 retries. First delivery has a 15-second timeout; retried deliveries have 120 seconds. Redirects (3xx) are a permanent failure. Large results (over 1 MB) and requests with payload storage disabled can only be fetched until the stored result expires. Failure modes. A handler that is down for 10 minutes can lose a 10 KB+ result's webhook deliveries entirely; design handlers to be idempotent per request_id and poll the queue as backup within the retention window. Limitations. Docs page, undated; the page changed or was more precisely read since the earlier note (cannot tell which). Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Correction of earlier record(s) C3-B545-01 from a discovery re-fetch on 2026-10-23; the curator re-located the cited excerpts by GET. Limitations: Whether the earlier wording was a misreading or a docs change is undetermined. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://fal.ai/docs/documentation/model-apis/inference/webhooks.md",
      "note": "Retries; Delivery"
    }
  ]
}