How I Would Fix exposed API keys and missing auth in a Circle and ConvertKit AI chatbot product Using Launch Ready.

How I Would Fix exposed API keys and missing auth in a Circle and ConvertKit AI chatbot product Using Launch Ready

The symptom is usually ugly but simple: the chatbot works for anyone who finds the endpoint, and one or more API keys are visible in the browser, repo, logs, or deployed environment. In business terms, that means unauthorized usage, surprise bills, customer data exposure, broken trust, and a real chance of account suspension from Circle or ConvertKit.

The most likely root cause is that the product was built fast with frontend-only calls to third-party APIs, then shipped without an auth layer or server-side proxy. The first thing I would inspect is where the chatbot sends requests from: browser network calls, server routes, environment variables in the deploy platform, and any public build artifacts.

Triage in the First Hour

1. Check the live app in the browser devtools.

• Inspect Network requests for Circle and ConvertKit calls.
• Look for API keys, tokens, webhook secrets, or admin endpoints in request headers, query params, or response bodies.
• Confirm whether the chatbot can be used without login.

2. Review deployment environment variables.

• Check Vercel, Netlify, Cloudflare Pages, Render, Railway, or similar dashboards.
• Verify which variables are public-facing and which are server-only.
• Look for any secret accidentally prefixed as public.

3. Inspect source control history.

• Search recent commits for keys, webhook URLs, auth bypasses, and temporary debug code.
• Check whether secrets were ever committed to git history.
• Confirm whether `.env`, `.env.local`, or backup files were exposed.

4. Review backend logs and function traces.

• Look for repeated unauthenticated chatbot requests.
• Check p95 latency and error spikes around auth failures.
• Identify whether logs are leaking tokens or user payloads.

5. Audit Circle and ConvertKit account settings.

• Confirm what each key can do.
• Check whether API keys are scoped narrowly enough.
• Rotate anything that was exposed publicly.

6. Inspect auth screens and route protection.

• Confirm login gates on protected pages.
• Check whether direct API routes can be called without a session.
• Verify role-based access if there are admin or member areas.

7. Check monitoring and alerting.

• See whether there is uptime monitoring on the app and key endpoints.
• Look for alerts on unusual request volume or failed auth attempts.

## Quick local search for likely secret leakage patterns
grep -RniE "api[_-]?key|secret|token|webhook|convertkit|circle" .

Root Causes

1. Frontend is calling third-party APIs directly.

• How to confirm: Open devtools Network tab and inspect requests from the browser to Circle or ConvertKit domains.
• Why it fails: Anything shipped to the client can be copied by users or bots.

2. Public environment variables were used for secrets.

• How to confirm: Check build config for variables exposed with `NEXT_PUBLIC_`, `VITE_`, `REACT_APP_`, or equivalent prefixes.
• Why it fails: Those values end up in client bundles and can be read by anyone.

3. No authentication gate exists on chatbot actions.

• How to confirm: Try opening protected routes in an incognito window or hitting chatbot endpoints without a session cookie or bearer token.
• Why it fails: Anonymous users can trigger expensive AI calls and third-party actions.

4. Webhooks or callbacks accept unsigned requests.

• How to confirm: Review webhook handlers for signature verification against Circle or ConvertKit docs.
• Why it fails: Attackers can spoof events and trigger downstream actions.

5. Secrets were committed into git history or deployment previews.

• How to confirm: Search commit history and preview deployments for old env files, debug logs, or copied credentials.
• Why it fails: Even if removed later, leaked secrets may already be harvested.

6. Over-permissioned API keys were used everywhere.

• How to confirm: Review key scopes in Circle and ConvertKit dashboards; check whether one key powers multiple environments and all actions.
• Why it fails: One leak becomes full platform access instead of limited damage.

The Fix Plan

My approach is not "patch one file and hope." I would contain exposure first, then rebuild the request path so secrets never reach the browser again.

1. Contain immediately.

• Rotate every exposed Circle and ConvertKit key before touching code further.
• Revoke old keys after confirming replacements work in staging first if possible.
• Pause any automation that could spam members or subscribers during repair.

2. Move all sensitive calls server-side.

• Replace direct browser-to-Circle/ConvertKit calls with a backend route or server action.
• The client should only talk to your own authenticated endpoint.
• Keep third-party credentials only in server environment variables.

3. Add auth at the entry point.

• Require session-based auth before any chatbot request is processed.
• If this is a paid product, enforce entitlement checks as well as login checks.
• Block anonymous access to message creation, member lookup, list writes, tag changes, and AI tool execution.

4. Add authorization by role and tenant scope.

• Ensure one user cannot access another user's workspace data or subscriber lists.
• If there are admins and members, separate permissions clearly.
• Do not rely on hidden UI elements as protection.

5. Verify webhooks with signatures and replay protection.

• Reject unsigned requests immediately.

\- Validate timestamp windows where supported by the provider docs? No need? Need ASCII only but must avoid weird? Let's craft cleanly.

Delivery Map

References

• [roadmap.sh - API security](https://roadmap.sh/api-security-best-practices)
• [OWASP API Security Top 10](https://owasp.org/www-project-api-security/)
• [MDN Web Docs - HTTP](https://developer.mozilla.org/en-US/docs/Web/HTTP)
• [Cloudflare DNS documentation](https://developers.cloudflare.com/dns/)
• [Sentry documentation](https://docs.sentry.io/)

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*