Zapier · api · fg-0373

Webhooks by Zapier returns 429 or delays processing during a burst of events

HTTP 429 from hooks.zapier.com

Verified 2026-10-15 · Confirmed by 0 builders · Trust 50/100

Cause

Catch hooks allow 20,000 requests every 5 minutes per user, and legacy URLs without a user ID in the path allow only 1,000 every 5 minutes per Zap. Under heavy load Zapier may return 200 and process later.

Fix

Retry non-200 responses with exponential backoff, regenerate legacy hook URLs, and do not assume a 200 means the Zap already ran.

Apply

for attempt in range(6):
    r = requests.post(hook_url, json=payload, timeout=10)
    if r.status_code != 429 and r.status_code < 500: break
    time.sleep(2 ** attempt)

Affects: Webhooks by Zapier catch triggers, as of 2026-10

Sources

• https://help.zapier.com/hc/en-us/articles/29972220283789-Webhooks-by-Zapier-rate-limits
• https://help.zapier.com/hc/en-us/articles/8496181445261-Zap-limits

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