this post was submitted on 22 Mar 2025
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This is basically the difference between HTTP 4xx and 5xx error codes. 4xx means the client did something wrong (invalid request, tried to load something that doesn't exist, doesn't have access), whereas 5xx means the request was OK but something broke on the server.
https://http.cat/
Yeah, I know how http status codes work. I just followed the existing pattern at my current place with gRPC and this post made me realize I don't know most gRPC error codes and best practices.
The way you phrased it made it sound like you definitely don't
gRPC does not use HTTP status codes. I meant that I might be making a similar mistake with gRPC status codes though, after checking just now, not so much (there are only 17 total codes, not all of which apply to my APIs).