HookCap vs webhook.site: Which Webhook Testing Tool Is Better in 2026?

HookCap vs webhook.site: A Direct Comparison

webhook.site is the default answer when someone asks "how do I inspect a webhook." It has been around since 2017 and has 400,000+ monthly users. It is also showing its age in ways that matter for developers who test webhooks regularly, not just once.

HookCap is a newer alternative built around the workflow that repeat webhook debuggers actually follow: capture, inspect, replay, iterate. This post compares the two tools directly so you can decide which fits your workflow.

Full disclosure: we built HookCap. We have tried to be accurate about where webhook.site is genuinely better.

The Core Difference

webhook.site is optimized for one-off inspection. You paste a URL, send a webhook, see what arrived. It is excellent at this.

HookCap is optimized for iterative debugging. You configure a persistent endpoint once, capture webhooks as they arrive in real time, and replay them against your server as you fix bugs. The workflow difference becomes significant after about the third time you need to re-test the same event.

Feature Comparison

Feature	webhook.site	HookCap
Free tier	Yes (7-day URL expiry)	Yes (permanent URLs)
Permanent endpoint URLs	Paid only	All plans, including free
Real-time streaming	Polling (delay)	WebSocket (instant)
One-click replay	No	Yes
Response mocking	Paid only	All plans
Custom domains	Paid	Pro+
Request history	24h free / longer paid	Plan-based
Payload inspection	Yes	Yes
HMAC signature display	Yes	Yes
Pricing (individual tier)	$18/mo	$12/mo

URL Persistence: The Biggest Practical Difference

webhook.site's free tier gives you a URL that expires after 7 days. Every time it expires, you need to go back to your webhook source (Stripe, GitHub, Shopify, whatever) and update the endpoint URL. If you are testing across multiple services, that is multiple places to update.

HookCap gives you permanent URLs on every plan, including free. You configure the endpoint once in your webhook source and never touch it again. The URL stays the same whether you come back tomorrow or in three months.

For one-off testing, URL expiry is not a problem. For any integration you are actively developing over multiple sessions, it adds friction on every return visit.

Real-Time Streaming vs Polling

webhook.site updates through polling — the UI periodically checks for new requests. The delay is usually 1-3 seconds. Not a showstopper, but when you are in a tight debug loop (trigger event → inspect payload → fix handler → trigger again), that delay is present on every iteration.

HookCap streams new requests over WebSocket. When a webhook arrives, it appears in the UI immediately — no refresh, no polling interval. If you have the HookCap dashboard open while running end-to-end tests, new requests appear as they land.

This makes the most difference when you are iterating quickly. Ten debug cycles with a 2-second delay adds 20 seconds. A hundred cycles adds three minutes of waiting that accomplishes nothing.

Replay: The Feature That Changes the Workflow

This is the biggest functional difference between the two tools.

webhook.site has no replay. If you want to re-send a captured webhook to your server, you need to:

1. Find the captured payload
2. Copy the full request body
3. Copy the relevant headers
4. Construct a curl command with all of that
5. Run it

That is 60-90 seconds of mechanical work, and you need to repeat it every time you fix a bug and want to re-test.

HookCap has one-click replay. You select a captured request, click Replay, and specify where to send it. HookCap re-sends the original payload with the original headers to your target URL. The whole operation takes about 5 seconds.

Here is the workflow difference in practice:

With webhook.site:

# You need to manually reconstruct this every time
curl -X POST https://your-server.dev/webhook \
  -H "Content-Type: application/json" \
  -H "Stripe-Signature: t=1234567890,v1=abc123..." \
  -H "User-Agent: Stripe/1.0 (+https://stripe.com/docs/webhooks)" \
  -d '{"id":"evt_1234","type":"checkout.session.completed","data":{...}}'

With HookCap:

Click Replay → enter your server URL → done. All original headers are preserved automatically, including signatures.

The replay feature matters most when you are working with complex payloads that are hard to reproduce. Stripe's checkout.session.completed event requires going through an actual checkout to trigger. GitHub's pull_request events require open PRs. Shopify order webhooks require placing test orders. Being able to replay a captured payload saves you from recreating the triggering scenario every time you fix a bug.

Response Mocking

webhook.site offers response mocking on paid plans. You can configure custom status codes, headers, and bodies. This is useful for testing how a webhook sender handles errors — returning 500 to verify Stripe retries, for example.

HookCap offers response mocking on all plans. You configure the response your endpoint returns as part of your endpoint settings. No plan upgrade needed for this.

Pricing

Plan	webhook.site	HookCap
Free	$0 — URLs expire in 7 days	$0 — permanent URLs
Individual	$18/mo	$12/mo
Pro/Business	$49/mo	Pro: $12/mo, Business: metered

webhook.site is more expensive at every paid tier. The gap is largest at the individual tier ($18 vs $12) — a 33% premium for a tool that does not include replay.

When webhook.site Is the Better Choice

To be direct: webhook.site is better for zero-friction, one-off inspection.

The no-signup experience is genuinely good. You go to webhook.site, you get a URL in under 10 seconds, you send your webhook, you see what arrived. You do not create an account, you do not configure anything, you do not remember a password.

If your use case is "I want to see what this service sends for my own understanding" or "I am writing documentation and need to capture one example payload," webhook.site's free tier is the fastest path.

HookCap requires creating an account. That is a real barrier if you only need the tool once.

When HookCap Is the Better Choice

HookCap is the better choice when you are actively developing a webhook integration — building the handler, iterating on business logic, testing edge cases.

The workflow difference compounds over multiple sessions:

• Permanent URLs mean you configure once and never update webhook sources again
• WebSocket streaming means you see events immediately without polling delays
• Replay means you can re-test with any captured payload without reconstructing it from scratch
• Response mocking on free tier means you can test error handling without upgrading

If you have been working with webhooks for more than a few weeks, you have probably hit the 7-day URL expiry at least once and done the manual copy-payload-to-curl dance at least a few times. HookCap eliminates both.

Making the Switch

If you are currently using webhook.site and want to try HookCap:

1. Go to hookcap.dev and create a free account
2. Create a new endpoint — you get a permanent URL immediately
3. Update your webhook source to point to the HookCap URL
4. Use the HookCap dashboard for real-time inspection and replay

If you are debugging a specific integration, the guides for Stripe webhooks and GitHub webhooks walk through the full setup with HookCap.

For a broader comparison that includes Beeceptor, ngrok, and RequestBin, see Webhook Testing Tools Compared (2026).

Summary

Use Case	Better Choice
One-off inspection, no account	webhook.site (free, no signup)
Active webhook integration development	HookCap
Need replay across multiple sessions	HookCap
Need permanent URLs on free tier	HookCap
Need response mocking without paying	HookCap
Testing against local server with debugger	ngrok (either for inspection)

The tools are different in kind, not just in features. webhook.site is optimized for the inspection use case. HookCap is optimized for the debugging use case. If you are debugging — iterating across multiple sessions on a webhook integration — HookCap is the better fit.