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Handling API Proxy Status Codes

In Mule 4, WSDL, RAML, HTTP, and HTTPS proxies handle errors and requests as described in the following tables. Mule 4 returns different error codes, depending on the proxy type, or no error code in response to problematic requests. This table shows whether or not Mule returns a 504, 400, or 404 error code when your WSDL, RAML, HTTP, and HTTPS proxy receives a problematic request.

Error Code WSDL RAML OAS HTTP HTTPS

504: request timeout

yes

yes

yes

yes

yes

400: bad request (validation result)

yes

no

yes

no

no

404: resource not found

no

yes

yes

no

no

405: method not allowed in API spec

no

no

yes

no

no