---
title: "Response Codes"
slug: "response-codes"
updated: 2025-03-27T08:17:46Z
published: 2025-03-27T08:17:46Z
canonical: "help.awin.com/response-codes"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.awin.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Response Codes

### **Successful & Informational Responses (2xx–3xx)**

| Status Code | Meaning | Description |
| --- | --- | --- |
| `200 OK` | Success | The request was successful, and the response body contains the result. |
| `201 Created` | Resource Created | The request was successful, and a new resource was created. |
| `202 Accepted` | Request Accepted | The request has been accepted for processing, but it’s not completed yet. |
| `204 No Content` | Success, No Body | The request was successful, but there's no content in the response body. |
| `304 Not Modified` | Cached Response | The resource has not been modified since the last request. No need to resend the data. |

### **Client Error Responses (4xx)**

| Status Code | Meaning | Description |
| --- | --- | --- |
| `400 Bad Request` | Invalid Input | The server couldn't understand the request due to invalid syntax or parameters. |
| `401 Unauthorized` | Auth Required | Authentication is required or has failed. |
| `403 Forbidden` | Access Denied | You don’t have permission to access this resource. |
| `404 Not Found` | Resource Missing | The requested resource doesn’t exist. |
| `409 Conflict` | Resource Conflict | The request conflicts with the current state (e.g. duplicate entry). |
| `422 Unprocessable Entity` | Validation Failed | Server understands the request but cannot process it due to semantic errors. |

### **Server Error Responses (5xx)**

| Status Code | Meaning | Description |
| --- | --- | --- |
| `500 Internal Server Error` | Generic Error | Something went wrong on the server. |
| `502 Bad Gateway` | Invalid Upstream | Server received an invalid response from another server. |
| `503 Service Unavailable` | Temporarily Down | Server is overloaded or down for maintenance. |
| `504 Gateway Timeout` | Upstream Timeout | Server didn’t get a timely response from another server. |