QABattle

API Testing / Quiz

Testing the Callbacks You Do Not Control

Tunnels, event replay, delivery vs processing, and dead letters, how to actually test a webhook receiver end to end.

Difficulty
Medium
Format
Quiz
Points
150
Estimate
9 min

// MISSION BRIEF

Your Mission

Webhooks arrive from someone else's server, on their schedule, over a hostile network. This quiz is about the testing workflow: exposing local endpoints, replaying captured events, proving your receiver survives retries, and knowing that "delivered" is not "processed".

// FIRST CONTACT

Battle teaser

To test a webhook receiver running on localhost against a real provider, the standard approach is:

  1. AExpose the local endpoint via a tunnel (ngrok/cloudflared) or the provider's CLI event forwarder, and register that URL
  2. BPoll the provider's API instead of receiving webhooks
  3. CDisable signature verification so any request works
  4. DDeploy every change to production to test it
Answers, scoring, hints, and the full battle stay sealed.

// SKILL TAGS

apiwebhooksintegration-testingobservability