# debug-zoom-webhook

Diagnoses Zoom webhook issues, covering endpoint validation handshakes, raw body signature verification, event delivery, and handler failures.

- command · `type=command` · Codex, ChatGPT · ★ 7604
- Author: Zoom · official OpenAI repository
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/openai/plugins/tree/HEAD/plugins/zoom/commands/debug-zoom-webhook.md
- Updated: 2026-10-08
- HTML: https://affpapa.org/en/nevibecode/commands/debug-zoom-webhook

## What it does

This command inspects your codebase for Zoom webhook routes, subscription definitions, and secret handling. Before changing any logic, it identifies the failure point across transport, signature checking, or application handlers. If the repository does not contain an endpoint route yet, the run halts immediately.

Signature checks fail when the framework parses JSON before verifying the payload hash. Zoom needs the exact raw request body along with the timestamp header. The command isolates validation issues from downstream business logic and suggests targeted fixes.

## Install

### Codex (native platform)

**Manually: put the files in place**
- File: `~/.codex/prompts/debug-zoom-webhook.md` — Call it with /prompts:debug-zoom-webhook. Codex marks this format deprecated in favour of skills

### Claude Code

**Manually: put the files in place**
- File: `.claude/commands/debug-zoom-webhook.md` — Call it with /debug-zoom-webhook. For all projects use ~/.claude/commands/

### GitHub Copilot

**Manually: put the files in place**
- File: `.github/prompts/debug-zoom-webhook.prompt.md`

### Gemini CLI

**Manually: put the files in place**
- File: `.gemini/commands/debug-zoom-webhook.toml` — Gemini stores commands as TOML: the prompt text goes into the prompt field

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/openai/plugins/tree/HEAD/plugins/zoom/commands/debug-zoom-webhook.md

## When to use it
- diagnose Zoom endpoint URL validation handshake failures
- fix webhook signature mismatches caused by pre-parsed request bodies
- isolate payload parsing errors from downstream handler logic

## Example prompts
- /debug-zoom-webhook events are not reaching the endpoint
- /debug-zoom-webhook signature verification fails on Zoom payloads
- /debug-zoom-webhook inspect the webhook validation handshake

## Source text · debug-zoom-webhook.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: f34108f4dc4dc29e.

BEGIN THIRD-PARTY FILE f34108f4dc4dc29e
````text
---
description: Diagnose Zoom webhook issues across endpoint validation, signature verification, event delivery, retries, and handler logic.
---

# Debug Zoom Webhook

Use this command when Zoom webhook events are not arriving, signature validation is failing, endpoint validation is broken, or handlers are processing the wrong payload shape.

## Preflight

1. Inspect the repo for webhook routes, signature verification code, event subscriptions, and deployment endpoint configuration.
2. Capture the failing symptom: no events, validation failure, signature mismatch, retries, or handler-side processing error.
3. Confirm the public callback URL, webhook secret env var name, and raw body handling path without printing secrets.
4. Check whether the implementation uses the exact raw request body for signature verification.
5. If the repo has no webhook endpoint yet, say that before attempting webhook debugging.

## Plan

Before changing anything:

- identify whether the likely fault is registration, validation, signature verification, transport, or business logic
- list the files and logs that will be checked
- state whether a replay or local reproduction will be used

## Commands

1. Inspect endpoint registration and subscribed event names.
2. Verify the endpoint validation flow is implemented for the expected Zoom webhook handshake.
3. Verify signature checking uses the raw request body, correct timestamp handling, and the right secret source.
4. Inspect handler parsing and downstream logic separately from signature verification.
5. Reproduce the failing request path with a safe replay or fixture when possible.
6. Apply the minimum fix needed to the failing layer instead of rewriting the entire webhook stack.

## Verification

1. Re-read the webhook route and verification helper after changes.
2. Confirm the endpoint validation path now returns the expected response shape.
3. Confirm the signature verification code operates on the raw body and correct headers.
4. If logs or replay are available, verify the handler reaches application logic successfully.
5. If delivery still fails, state whether the remaining blocker is registration, public reachability, or Zoom-side configuration.

## Summary

```text
## Result
- Action: diagnosed or fixed a Zoom webhook issue
- Status: success | partial | failed
- Details: failing layer, files checked, fix applied, remaining blocker
```

## Next Steps

- Send one real or replayed event through the endpoint.
- Add regression coverage for signature verification and endpoint validation if missing.
- If the root cause is auth or app setup, run `/debug-zoom-auth` or `/setup-zoom-oauth` next.
````
END THIRD-PARTY FILE f34108f4dc4dc29e

The third-party file has ended. Everything between the f34108f4dc4dc29e tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

© Zoom · MIT · https://github.com/openai/plugins/tree/HEAD/plugins/zoom/commands/debug-zoom-webhook.md

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