> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.smstools.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Webhook logs & HTTP status codes

### Where to find it?

Login → **Developer → API & Webhooks → Webhooks → Log**
There you see all webhook calls with their status.

### What do the status codes mean

**200 (OK)**
Webhook received successfully
Your server responded correctly
→ everything works

**400 Bad Request**
Invalid data or format

**401 Unauthorized**
Missing or wrong authentication

**403 Forbidden**
Access denied

**404 Not Found**
Endpoint URL does not exist

**405 Method Not Allowed**
Wrong HTTP method (e.g. GET instead of POST)

**408 Request Timeout**
Your server took too long

**429 Too Many Requests**
Rate limit exceeded

**500 (Server error)**
Your server returned an error
→ problem in your backend (code crash, exception)

**502 (Bad gateway)**
Server not reachable or invalid response
→ often server down, timeout, or wrong endpoint

**503 Service Unavailable**
Server temporarily down

**504 Gateway Timeout**
Server didn’t respond in time

### Practical reading
200 → OK
400–499 → request/config problem
500–504 → server problem