# Inference API call returning “HTTP/1.1 400 Bad Request”

## post by alokob on Feb 6, 2025

Hi ,

We are using lambdalabs for inference. For some requests I am getting “HTTP/1.1 400 Bad Request” in response from [https://api.lambdalabs.com/v1/chat/completions](https://api.lambdalabs.com/v1/chat/completions).

As response does not have any specific indicator of what's wrong in the request, so it's difficult to find out where it's failing to serve the inference. Please can anyone guide on this. Thanks

## post by cody_b on Feb 6, 2025

Can you try the [Using the Lambda Inference API > Creating chat completions](https://docs.lambdalabs.com/public-cloud/lambda-inference-api/#curl) cURL example and post the results?