In recent times, 400 meaning http has become increasingly relevant in various contexts. 400 BAD request HTTP error code meaning? A 400 means that the request was malformed. In other words, the data stream sent by the client to the server didn't follow the rules.
In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service. By that logic, both the scenarios you provided should be 400s ... Additionally, javascript - WebSocket connection failed: Error during WebSocket ....
In relation to this, webSocket connection failed: Error during WebSocket handshake: Unexpected response code: 400 Asked 8 years, 10 months ago Modified 1 month ago Viewed 528k times java - How to respond with an HTTP 400 error in a Spring MVC .... I'm using Spring MVC for a simple JSON API, with a @ResponseBody based approach like the following. (I already have a service layer producing JSON directly.) @RequestMapping(value = "/matches/{ How to solve HTTP Error 400: Bad Request in PyTube?.

Asked 1 year, 8 months ago Modified 1 year, 1 month ago Viewed 45k times 400 vs 422 response to POST of data - Stack Overflow. Situations of 400 over 422: Remember, the response code 422 is an extended HTTP (WebDAV) status code. There are still some HTTP clients / front-end libraries that aren't prepared to handle 422. Building on this, for them, its as simple as "HTTP 422 is wrong, because it's not HTTP".
Additionally, from the service perspective, 400 isn't quite specific. How do I fix; openai.BadRequestError: Error code: 400?. Usually 400 comes with an additional message, because Bad Request is a pretty generic HTTP status code. In my case, trying to reproduce the example led to the following error:

How do I fix a 400 Bad Request error in .Net Core POST operation?. You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation and how do I get it?
Instead, you can save this post to reference later. java - Server returned HTTP response code: 400 - Stack Overflow. spring rest Handling empty request body (400 Bad Request). Azure OpenAI error Error code: 400 - {'statusCode': 400, 'message ....

Apart from the obvious additions, the only thing I had to do to prevent code 400 errors was to include the word JSON somewhere within messages. This is necessary when you force a json_object response_format.

📝 Summary
Through our discussion, we've examined the different dimensions of 400 meaning http. This information don't just inform, while they enable you to make better decisions.
