Anonymily vs webhook.site: Which Should You Use?

webhook.site is one of the most useful tools on the developer internet: open the page, get a unique URL and email inbox instantly, no account, and watch requests land in real time. For "what is this provider actually sending me?" it's hard to beat.

Anonymily is aimed at a different moment — not the one-off "let me peek at a payload," but the full loop: capture, forward to localhost, replay, generate signed test events, verify signatures, and have AI diagnose failures. Here's an honest comparison so you can pick the right one (and they're genuinely complementary).

Honesty note (verified 2026-06-19): webhook.site is excellent and open-source-friendly. Verify current details at webhook.site and docs.webhook.site before relying on specifics — pricing in particular moves.

The short version

	webhook.site	Anonymily
Get started	Open the page — instant URL, no account	`npx @anonymilyhq/cli listen 3000`
Free URL lifespan	Expires after 7 days (URL + data deleted)	Permanent — configure providers once
Permanent/custom URL	Paid (from ~$9/mo Basic)	✅ free tier includes one
Forward to localhost	✅ free open-source CLI (`whcli forward`)	✅ webhook-native CLI + response capture
Signed synthetic events	❌	✅ `trigger` for Stripe/GitHub/Shopify/Slack/Razorpay
Signature verification	DIY in WebhookScript (paid, you write it)	✅ built-in helper, explains why it failed
AI diagnosis + handler gen	❌	✅
MCP server	❌ (none official)	✅ agent drives capture/replay/trigger/diagnose
Server-side forwarding / actions	✅ Custom Actions (paid)	✅ included

Where webhook.site is the better choice

Credit where it's due — reach for webhook.site when:

You want a URL right now with zero setup and no account.
You're doing a quick, one-off "what does this provider POST?" inspection.
You want the bundled email inbox to catch a confirmation message.
You want a free, open-source CLI to proxy requests to localhost for a short task.

For these, webhook.site is faster than signing up for anything. It's a great Swiss-army inspector.

Where Anonymily fits better

1. Your URL doesn't self-destruct

On webhook.site's free tier, the URL and its data are deleted after 7 days — so for an integration you're building over weeks, you re-create the URL and re-paste it into every provider dashboard repeatedly (a permanent URL is a paid plan). Anonymily's free tier gives you one persistent URL you configure into Stripe/GitHub once and keep.

2. Provider-signed synthetic events

webhook.site shows you what arrives; it doesn't generate a correctly-signed event to test against. Anonymily fires realistic, signed events on demand — no real charges, PRs, or orders:

npx @anonymilyhq/cli trigger github push --hook <hookId> --token <PAT>

3. Signature verification is built in, not DIY

You can verify signatures on webhook.site — by writing WebhookScript (hmac(), compare to the header) inside a paid Custom Action. Anonymily auto-detects the provider, verifies the signature, and tells you why it failed (test vs live secret, raw-body mismatch) — no code to write.

4. Replay with edits and re-signing

Anonymily retains history and lets you replay an exact captured request later — edit the body or headers and re-sign it — from the CLI or dashboard:

npx @anonymilyhq/cli replay <hookId> <requestId> --body '{"amount":5000}' --resign --token <PAT>

5. AI that diagnoses and writes the handler

This is the biggest gap. webhook.site has no AI layer that reads your payload + response and explains a failure, then generates the correct Express/Next.js/NestJS handler grounded in that exact payload. Anonymily does, and exposes it to your AI agent over MCP.

Use them together

A common, honest workflow: grab a webhook.site URL for a 30-second "is the provider even sending anything?" sanity check — then move to Anonymily for the actual build, where permanent URLs, signed test events, replay-with-re-sign, signature verification, and AI diagnosis are the work.

npx @anonymilyhq/cli listen 3000