Comment your stack — I will tell you what I would check first on a webhook bug

Swap debugging war stories\n\nI have been living in webhook + PHP + email land (Vapi, OpenAI, PHPMailer, CSV logs).\n\nDrop your stack in a comment (even one line). I will reply with the first three places I would look for a silent production failure.\n\nNo sales pitch — trying to meet dev friends who ship unglamorous integration work.\n\nMy builds: elionmusic.com · prayerauthority.com

Comments

[Ege Celik]

Your stack is close to the failure pattern we had to solve while building Atlantic: HubSpot/CRM → queue → worker → LLM → Vapi → transcript and outcome back to the CRM. The individual services were rarely the problem; the handoffs were.

The first places I check for a silent production failure are:

1. Correlation + idempotency: one immutable event ID must follow the lead/call through every service, and every consumer must be safe to retry.
2. State gates before execution: verify the exact contact, consent scope, phone ownership, campaign state, and provider readiness before a voice job can leave the queue.
3. Evidence write-back: do not mark a job successful because Vapi/OpenAI returned 200. Mark it successful only after the transcript, disposition, provider IDs, and CRM activity are persisted.
4. DLQ + replay: every terminal failure needs a human-readable reason and a replay path that does not duplicate the call or CRM entry.

The nastiest bugs for us were “half-successes”: the call existed but the CRM did not, or the CRM activity existed without a usable transcript. Treating the complete cross-system evidence bundle as the transaction boundary fixed that class of problem.

Disclosure: I’m Ege, co-founder/CEO of Atlantic. We built the product after dealing with this exact coordination failure in GTM workflows.