HTTP Code: 400 (Bad Request)
HTTP Status Code Reference
Status Category
4xx — Client Error
Meaning & Definition
The server cannot process the request due to something that is perceived to be a client error (e.g., malformed request syntax).
Common Causes
- Malformed JSON or XML body syntax
- Invalid query parameter types
- Missing required payload attributes
How to resolve HTTP code errors
1. Inspect Logs: Check server logs (e.g. error.log) to locate runtime exceptions or database disconnects.
2. Test Endpoint: Use our Uptime Checker or redirects prober to verify response headers and payload size.
3. Configure Rules: Implement custom redirect rules or error fallback paths below in Nginx/Apache config.
Nginx Configuration Setup
# Limits request buffer sizes to prevent 400 errors client_body_buffer_size 128k; client_header_buffer_size 1k;
Apache Configuration Setup
# Restrict malformed request limits LimitRequestFields 100