CHANGELOG.md

@@ -6,6 +6,8 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) loos
 
 ## Unreleased
 
+- Infisical API error responses are now parsed to surface the server-side `message`, `error`, and `reqId` fields. The 4xx/5xx exception message includes the human-readable explanation (e.g. "The project is of type secret-manager") instead of an opaque `Infisical API returned 400 (Bad Request)`. The `InfisicalApiException` gains `ApiErrorMessage` and `ApiRequestId` properties; `InfisicalErrorDetails` carries the same fields so PowerShell error records and logger output expose them.
+
 ## 2026.06.04.1920
 
 - Build produced from commit 0f8f44afdb38.

src/PSInfisicalAPI/Errors/InfisicalApiErrorEnvelope.cs

@@ -0,0 +1,119 @@
+using System;
+using Newtonsoft.Json.Linq;
+
+namespace PSInfisicalAPI.Errors
+{
+    internal static class InfisicalApiErrorEnvelope
+    {
+        public static void Enrich(InfisicalApiException exception, string body)
+        {
+            if (exception == null || string.IsNullOrEmpty(body))
+            {
+                return;
+            }
+
+            string trimmed = body.TrimStart();
+            if (trimmed.Length == 0 || (trimmed[0] != '{' && trimmed[0] != '['))
+            {
+                return;
+            }
+
+            JObject obj;
+            try
+            {
+                JToken token = JToken.Parse(body);
+                if (token.Type != JTokenType.Object) { return; }
+                obj = (JObject)token;
+            }
+            catch (Exception)
+            {
+                return;
+            }
+
+            string message = ReadString(obj, "message");
+            string error = ReadString(obj, "error");
+            string reqId = ReadString(obj, "reqId");
+
+            if (!string.IsNullOrEmpty(message)) { exception.ApiErrorMessage = message; }
+            if (!string.IsNullOrEmpty(error) && string.IsNullOrEmpty(exception.ApiErrorCode)) { exception.ApiErrorCode = error; }
+            if (!string.IsNullOrEmpty(reqId)) { exception.ApiRequestId = reqId; }
+        }
+
+        public static string BuildExceptionMessage(int statusCode, string reasonPhrase, string body)
+        {
+            string baseMessage = string.Concat(
+                "Infisical API returned ",
+                statusCode.ToString(System.Globalization.CultureInfo.InvariantCulture),
+                " (", reasonPhrase ?? string.Empty, ").");
+
+            string apiMessage = null;
+            string apiError = null;
+            string reqId = null;
+
+            if (!string.IsNullOrEmpty(body))
+            {
+                string trimmed = body.TrimStart();
+                if (trimmed.Length > 0 && trimmed[0] == '{')
+                {
+                    try
+                    {
+                        JToken token = JToken.Parse(body);
+                        if (token.Type == JTokenType.Object)
+                        {
+                            JObject obj = (JObject)token;
+                            apiMessage = ReadString(obj, "message");
+                            apiError = ReadString(obj, "error");
+                            reqId = ReadString(obj, "reqId");
+                        }
+                    }
+                    catch (Exception)
+                    {
+                    }
+                }
+            }
+
+            if (string.IsNullOrEmpty(apiMessage) && string.IsNullOrEmpty(apiError) && string.IsNullOrEmpty(reqId))
+            {
+                return baseMessage;
+            }
+
+            System.Text.StringBuilder builder = new System.Text.StringBuilder(baseMessage);
+            if (!string.IsNullOrEmpty(apiMessage))
+            {
+                builder.Append(' ').Append(apiMessage);
+            }
+
+            if (!string.IsNullOrEmpty(apiError) || !string.IsNullOrEmpty(reqId))
+            {
+                builder.Append(" [");
+                bool needsSeparator = false;
+                if (!string.IsNullOrEmpty(apiError))
+                {
+                    builder.Append("error=").Append(apiError);
+                    needsSeparator = true;
+                }
+
+                if (!string.IsNullOrEmpty(reqId))
+                {
+                    if (needsSeparator) { builder.Append("; "); }
+                    builder.Append("reqId=").Append(reqId);
+                }
+
+                builder.Append(']');
+            }
+
+            return builder.ToString();
+        }
+
+        private static string ReadString(JObject obj, string name)
+        {
+            JToken token;
+            if (obj.TryGetValue(name, StringComparison.OrdinalIgnoreCase, out token) && token != null && token.Type == JTokenType.String)
+            {
+                return (string)token;
+            }
+
+            return null;
+        }
+    }
+}

src/PSInfisicalAPI/Errors/InfisicalErrorDetails.cs

@@ -10,6 +10,8 @@ namespace PSInfisicalAPI.Errors
         public int? StatusCode { get; set; }
         public string ReasonPhrase { get; set; }
         public string ApiErrorCode { get; set; }
+        public string ApiErrorMessage { get; set; }
+        public string ApiRequestId { get; set; }
         public string SanitizedBody { get; set; }
         public int? LineNumber { get; set; }
         public int? LinePosition { get; set; }

src/PSInfisicalAPI/Errors/InfisicalErrorHandler.cs

@@ -26,6 +26,8 @@ namespace PSInfisicalAPI.Errors
                 details.StatusCode = apiException.StatusCode;
                 details.ReasonPhrase = apiException.ReasonPhrase;
                 details.ApiErrorCode = apiException.ApiErrorCode;
+                details.ApiErrorMessage = apiException.ApiErrorMessage;
+                details.ApiRequestId = apiException.ApiRequestId;
                 details.SanitizedBody = apiException.SanitizedBody;
                 details.EndpointName = apiException.EndpointName;
                 details.RequestMethod = apiException.RequestMethod;
@@ -70,6 +72,16 @@ namespace PSInfisicalAPI.Errors
                 logger.Error(Component, string.Concat("API Error Code: ", details.ApiErrorCode));
             }
 
+            if (!string.IsNullOrEmpty(details.ApiErrorMessage))
+            {
+                logger.Error(Component, string.Concat("API Error Message: ", details.ApiErrorMessage));
+            }
+
+            if (!string.IsNullOrEmpty(details.ApiRequestId))
+            {
+                logger.Error(Component, string.Concat("API Request Id: ", details.ApiRequestId));
+            }
+
             if (details.LineNumber.HasValue)
             {
                 logger.Error(Component, string.Concat("Line: ", details.LineNumber.Value.ToString(CultureInfo.InvariantCulture)));

src/PSInfisicalAPI/Errors/InfisicalException.cs

@@ -33,6 +33,8 @@ namespace PSInfisicalAPI.Errors
         public int StatusCode { get; set; }
         public string ReasonPhrase { get; set; }
         public string ApiErrorCode { get; set; }
+        public string ApiErrorMessage { get; set; }
+        public string ApiRequestId { get; set; }
         public string SanitizedBody { get; set; }
         public string EndpointName { get; set; }
         public string RequestMethod { get; set; }

src/PSInfisicalAPI/Http/InfisicalApiInvoker.cs

@@ -135,15 +135,14 @@ namespace PSInfisicalAPI.Http
 
         private static InfisicalApiException BuildApiException(InfisicalHttpResponse response, InfisicalEndpointDefinition definition)
         {
-            InfisicalApiException exception = new InfisicalApiException(string.Concat(
-                "Infisical API returned ",
-                response.StatusCode.ToString(CultureInfo.InvariantCulture),
-                " (", response.ReasonPhrase ?? string.Empty, ")."));
+            string message = InfisicalApiErrorEnvelope.BuildExceptionMessage(response.StatusCode, response.ReasonPhrase, response.Body);
+            InfisicalApiException exception = new InfisicalApiException(message);
             exception.StatusCode = response.StatusCode;
             exception.ReasonPhrase = response.ReasonPhrase;
             exception.EndpointName = definition.Name;
             exception.RequestMethod = definition.Method;
             exception.SanitizedBody = response.Body;
+            InfisicalApiErrorEnvelope.Enrich(exception, response.Body);
             return exception;
         }
     }

src/PSInfisicalAPI/Secrets/InfisicalSecretsClient.cs

@@ -625,15 +625,14 @@ namespace PSInfisicalAPI.Secrets
 
         private static InfisicalApiException BuildApiException(InfisicalHttpResponse response, InfisicalEndpointDefinition definition)
         {
-            InfisicalApiException exception = new InfisicalApiException(string.Concat(
-                "Infisical API returned ",
-                response.StatusCode.ToString(CultureInfo.InvariantCulture),
-                " (", response.ReasonPhrase ?? string.Empty, ")."));
+            string message = InfisicalApiErrorEnvelope.BuildExceptionMessage(response.StatusCode, response.ReasonPhrase, response.Body);
+            InfisicalApiException exception = new InfisicalApiException(message);
             exception.StatusCode = response.StatusCode;
             exception.ReasonPhrase = response.ReasonPhrase;
             exception.EndpointName = definition.Name;
             exception.RequestMethod = definition.Method;
             exception.SanitizedBody = response.Body;
+            InfisicalApiErrorEnvelope.Enrich(exception, response.Body);
             return exception;
         }