Send test payloads to your Zapier Catch Hook on demand. No more racing to fire data while the test step is open. See exactly what Zapier receives and returns.
These are the most common issues Zapier users run into with Catch Hook triggers. A proper testing tool helps you work around them.
Zapier only captures webhook data that arrives while the test step is open in the Zap editor. If your source fires the webhook before you click Test or after you navigate away, the data never shows up. There's no persistent queue of recent payloads.
Send the same payload twice and Zapier silently skips the second one, returning _zap_data_was_skipped: true. This bites you during testing when you send the same test payload repeatedly, and in production when legitimately identical events occur.
Zapier's Catch Hook flattens nested objects and arrays into a single concatenated string. You can't access individual items in an array or drill into nested objects. You need Catch Raw Hook plus a Code step to JSON.parse() the raw payload.
On Team and Enterprise plans, the Catch Hook URL is tied to the Zap owner's account. Transfer the Zap to a different team member and the URL silently changes. Every external system posting to the old URL breaks with no redirect or notification.
Zapier enforces 30 requests per second per webhook URL. Exceed it and you get 429 errors with "The throttling validation check failed." If the sender doesn't handle retries, those events are permanently lost.
The standard Catch Hook only exposes the request body, not headers. Need to verify a webhook signature from X-Hub-Signature? You must use Catch Raw Hook and a Code step to parse headers manually. No built-in HMAC verification.
Purpose-built for webhook testing. Pre-configured with POST + JSON defaults so you can send test data to your Zaps immediately.
Fire HTTP requests to your Zapier Catch Hook URL whenever you need to. No more racing to send data while the test step is open. You control the timing and the payload.
Edit your JSON payload, send it, check if Zapier parsed it correctly, adjust, and re-send. The extension auto-sets Content-Type: application/json so Zapier receives structured data.
See the full response status code, headers, and body with JSON syntax highlighting. Catch 429 rate limit errors and deduplication skips immediately instead of discovering them later in Zap history.
Paste cURL commands from Zapier help docs or Stack Overflow and they auto-convert to a ready-to-send request. Export your working request as cURL for documentation.
Your last 100 requests are saved automatically. Restore any previous request with one click. Add a unique timestamp field to avoid deduplication when re-sending the same test payload.
Send GET, POST, PUT, PATCH, DELETE, OPTIONS, and HEAD requests. Test Zapier action webhooks, not just Catch Hook triggers. Use Basic Auth or Bearer tokens for authenticated endpoints.
Add Zapier Webhook Tester to Chrome from the Web Store. Free, no credit card.
Copy your Zapier Catch Hook URL (hooks.zapier.com/hooks/catch/...) and paste it in. The extension defaults to POST with a JSON body.
Write your JSON payload and hit Send. Check the response to confirm Zapier received and parsed your data correctly.
Stop fighting the test window, deduplication, and payload parsing. Send test data on your terms and see exactly what Zapier receives.
