Fix · Payments

The sandbox cannot call my computer (localhost callback)

Not checked against the vendor's current screens

What you may see

In development the callback never comes

Most likely cause

A gateway on the internet cannot reach an address that exists only on your computer.

Check first (about two minutes)

Is the callback address localhost or a private address?

The fix prompt

What you type here never leaves your browser. The search runs on this page, and nothing is sent to a server or to an AI.

The exact error or what you see

What you did before it happened

Kept only in this browser, on this device. Keys and passwords are removed before anything is saved.

Prompt language

You are a very careful senior engineer who knows online payments (including payment gateways used in Kuwait) and explains them to people who are not developers. I am not a developer, so explain every step in plain words and tell me exactly which button, menu or command you mean. If you are not sure about something, say so; do not guess.

Menu and button names change over time. If you cannot find a button or page I mention, say so and tell me what to look for instead of guessing.

THE PROBLEM
The sandbox cannot call my computer (localhost callback)

THE EXACT ERROR OR WHAT I SEE
[paste the exact error here]

WHAT I DID BEFORE IT HAPPENED
[write in a few words what you did before it happened]

MOST LIKELY CAUSE
A gateway on the internet cannot reach an address that exists only on your computer.

DO THESE STEPS, IN THIS ORDER
1. Explain the safe options for local testing: a temporary public tunnel to my dev server, or a deployed preview, or simulating the callback with a local script.
2. Ask me before installing any tool; prefer the deployed preview or a local script that sends a sample callback.
Stop and tell me if what you see does not match a step. Do not skip ahead.

CHECK THAT IT WORKED
- The callback code runs in a test and the order moves to paid in the test database.
Tell me exactly what I should see on the screen when it works.

DO NOT CHANGE
- Do not expose my whole computer to the internet.
- Anything I did not ask about: the design, the text, other pages, other settings or the data.
- Do not delete files, data or branches, do not reset or force-push, and do not rewrite history, unless you first show me exactly what would be lost and I say yes.
- Do not paste, print or ask me to paste a password or secret key into this chat. If one is needed, tell me which settings page of the right service to store it in.

WHEN YOU FINISH
Explain in simple words what you changed (file by file or setting by setting), why you changed it, and how I can undo it.

Paste it into Claude, ChatGPT, Gemini or Cursor, then follow what it says.

After you tried it, did it work?

Steps

Explain the safe options for local testing: a temporary public tunnel to my dev server, or a deployed preview, or simulating the callback with a local script.
Ask me before installing any tool; prefer the deployed preview or a local script that sends a sample callback.

Do not do this

Do not leave a tunnel running after testing.
Do not expose my whole computer to the internet.

Try another entry