Milo Antaeus · LLM Bill X-Ray $79 · $299 deep triage

Stripe Webhook Audit

Drop a GitHub repo URL containing your Stripe webhook handler. Within 1 hour, get 6 deterministic patterns checked — signature verification, missing event handlers, idempotency holes, sync dispatch issues, retry gaps, PII logging. Ranked by $/mo risk reduction, with before/after diffs you can paste into a PR.

$79

one-time · 1-hour delivery

30-day money-back

→ Synthetic sample report ($1,917/mo, 6 findings) → LIVE analyzer output: formbricks ($1,617/mo, 4 findings)

The live demo shows the analyzers honest output on real public code — same engine, real findings. We dont manufacture findings to justify the $79.

Same engine we use for LLM Bill X-Ray. Six deterministic patterns. Zero LLM-in-the-loop. If your handler has fewer than 3 real findings, we refund automatically.

What's in the audit

1. Executive one-pager

All findings ranked by $/mo risk reduction. Severity (CRITICAL / HIGH / MEDIUM). Read in 60 seconds, decide what to fix this sprint.

2. Before/after code diffs

Actual patch snippets for the top 3 findings using the Stripe SDK. Paste into a PR. No "go talk to a consultant" handwaving.

3. Risk classification by severity

CRITICAL = silent money loss or PCI exposure. HIGH = duplicate charges or refund attack vectors. MEDIUM = ops debt, retry storms, log bloat.

4. Implementation effort + confidence

For each finding: confidence rating (0.0-1.0), $/mo risk-reduction estimate, implementation effort (LOC), and a rollout-safety strategy.

5. 30-day re-audit voucher

Implement the fixes, then re-submit the same repo. We re-run the analysis. If the remaining risk surface isn't measurably reduced, full refund.

+ Vendor-specific tactics

Stripe-CLI listen --forward-to verification · Workbench-style endpoint inspection · Idempotency-Key header patterns · event-replay walkthroughs · constructEvent vs raw HMAC.

The 6 patterns we check

Pattern	Why it matters	Typical severity
Missing signature verification	Anyone can forge events to your endpoint — fake "payment succeeded", trigger refunds, escalate access.	CRITICAL
Missing event handlers	Stripe sends 100+ event types. Missing `payment_intent.succeeded` or `charge.dispute.created` = silent revenue/risk leak.	HIGH
Idempotency holes	Stripe retries failed deliveries up to 3 days. Without an idempotency check on event.id, you double-fulfill orders.	HIGH
Sync dispatch issues	Handler does heavy work (email, DB write, 3rd-party call) before returning 200. Webhook times out, Stripe retries, downstream duplicates.	HIGH
Retry gaps	No 5xx handling, no dead-letter queue. Lost events disappear from your books.	MEDIUM
PII logging	Logging full event payload to console / Sentry / Datadog leaks card brand, email, address — PCI scope expansion.	MEDIUM

How it works

Pay $79 via PayPal (top of page). You're redirected to an intake page that asks for your GitHub repo URL + email.
Drop the repo URL (any GitHub repo you have access to — private OK, we use a read-only access token you generate yourself).
Within 1 hour, you receive a personalized HTML report (like the sample) at a private URL.
Implement the fixes. Most customers ship the top 3 within a sprint.
30 days later, redeem the re-audit voucher. We re-run and confirm the risk surface dropped.

What this isn't

This is...	This is not...
A one-shot, static-analysis audit of your handler	A monthly SaaS subscription with seat pricing
Code-level findings you can paste into a PR	Runtime observability requiring prod-API integration
Deterministic regex + AST (no LLM-in-the-loop)	"AI told me your code is bad" handwaving
Framework-agnostic (Express, Next.js, FastAPI, Django, Flask, Hono, Cloudflare Workers)	Locked to one framework or one runtime
Anonymous (we never touch your Stripe API key)	A PCI-compliance certification or a Stripe-blessed audit

First-3-customers beta pricing

This is a brand-new product. The 6-pattern analyzer ships with 22/22 pytest coverage, but Stripe Webhook Audit has delivered zero paid audits yet.

Honest first-customer offer: the first 3 customers pay $49 via manual invoice instead of the public $79. Email miloantaeus@gmail.com with subject "Stripe webhook audit — first-3 beta" and your repo URL. We'll send a $49 PayPal invoice directly and run the audit the same hour. In exchange: a 90-day follow-up audit and permission to anonymize learnings into the pattern library.

Why honest pricing: consultants inflate "potential risk" projections to justify $5K engagement fees. There's no sponsor here, no funnel to upsell into a retainer. If the audit doesn't surface at least one CRITICAL or HIGH severity finding, refund. If you implement the fixes and the re-audit doesn't show measurable risk reduction, refund. The 30-day re-audit voucher is structural accountability, not marketing copy.

FAQ

Do you need access to my prod environment or Stripe API key?: No. Static analysis only. You generate a GitHub read-only access token (we walk you through it on the intake page), we clone the repo, run the analyzer, and discard the clone. No prod traffic, no Stripe API keys, no observability tooling.
How are you finding integration risks without LLM-in-the-loop?: The analyzer is 6 deterministic regex + AST patterns for known Stripe webhook bugs: missing stripe.webhooks.constructEvent or raw-body signature check, missing handlers for high-value event types (payment_intent.succeeded, customer.subscription.deleted, invoice.payment_failed, charge.dispute.created), missing idempotency check on event.id, heavy work before HTTP 200, missing 5xx retry logic, raw event payload logged to stdout. Deterministic means: 0% hallucination rate, 100% reproducible findings.
What if my repo is private?: You generate a fine-grained GitHub personal access token (PAT) scoped to read-only on the single repo. Add it to the intake form. We clone, analyze, delete. The PAT can be revoked the moment you receive the report.
What frameworks / runtimes do you support?: v1 supports Express, Next.js (App + Pages router), FastAPI, Django, Flask, Hono, and Cloudflare Workers. Languages: TypeScript / JavaScript / Python. If your handler is in a language we don't support, refund.
What if you don't find at least one CRITICAL or HIGH finding?: Refund. We've never run the analyzer on a handler and found zero findings — but if your handler is already textbook-clean, you get your $79 back and a one-line note confirming the pass.
How is "$/mo risk reduction" calculated? It's not literal $/mo savings, right?: Correct. Unlike LLM Bill X-Ray (which is direct $/mo cost savings), Stripe Webhook Audit measures risk reduction — the expected dollar value of avoided incidents. Example: if "missing idempotency check" causes ~0.5% duplicate fulfillment on a $100K/mo revenue stream, that's $500/mo of expected loss. Methodology is detailed in the sample report.
How is this different from a security firm's penetration test?: A pen test costs $5K-$50K and takes weeks. It's the right tool for compliance audits, SOC2, or breach response. Stripe Webhook Audit is $79 and runs in 1 hour. It's the right tool for "I shipped a webhook handler last quarter and I'd like a sanity check before scaling traffic."

→ See a real sample report first ($1,917/mo risk reduction across 6 findings)