diff --git a/SPMS.API/Controllers/ServiceController.cs b/SPMS.API/Controllers/ServiceController.cs
index fc968a7..ddb0ed0 100644
--- a/SPMS.API/Controllers/ServiceController.cs
+++ b/SPMS.API/Controllers/ServiceController.cs
@@ -116,7 +116,7 @@ public class ServiceController : ControllerBase
     [HttpPost("{serviceCode}")]
     [SwaggerOperation(
         Summary = "서비스 상세 조회",
-        Description = "특정 서비스의 상세 정보를 조회합니다. apnsAuthType(p8/p12)과 platforms 필드로 각 플랫폼의 자격증명 상태(credentialStatus: ok/warn/error), 만료일(expiresAt) 정보를 포함합니다.")]
+        Description = "특정 서비스의 상세 정보를 조회합니다. API Key는 마스킹(앞 8자+********)되어 반환되며, 전체 키 조회는 apikey/view 엔드포인트를 사용합니다. apnsAuthType(p8/p12)과 platforms 필드로 각 플랫폼의 자격증명 상태(credentialStatus: ok/warn/error), 만료일(expiresAt) 정보를 포함합니다.")]
     [SwaggerResponse(200, "조회 성공", typeof(ApiResponse<ServiceResponseDto>))]
     [SwaggerResponse(401, "인증되지 않은 요청")]
     [SwaggerResponse(403, "권한 없음")]
@@ -144,6 +144,20 @@ public class ServiceController : ControllerBase
         return Ok(ApiResponse<ServiceResponseDto>.Success(result));
     }
 
+    [HttpPost("{serviceCode}/apikey/view")]
+    [SwaggerOperation(
+        Summary = "API Key 전체 조회",
+        Description = "서비스의 API Key 전체 값을 조회합니다. 상세 조회 시 마스킹된 키 대신 전체 키를 확인할 때 사용합니다. 키 회전(재발급) 없이 현재 키를 반환합니다.")]
+    [SwaggerResponse(200, "조회 성공", typeof(ApiResponse<ApiKeyRefreshResponseDto>))]
+    [SwaggerResponse(401, "인증되지 않은 요청")]
+    [SwaggerResponse(403, "권한 없음")]
+    [SwaggerResponse(404, "서비스를 찾을 수 없음")]
+    public async Task<IActionResult> ViewApiKeyAsync([FromRoute] string serviceCode)
+    {
+        var result = await _serviceManagementService.ViewApiKeyAsync(serviceCode);
+        return Ok(ApiResponse<ApiKeyRefreshResponseDto>.Success(result));
+    }
+
     [HttpPost("{serviceCode}/apikey/refresh")]
     [SwaggerOperation(
         Summary = "API Key 재발급",
diff --git a/SPMS.Application/Interfaces/IServiceManagementService.cs b/SPMS.Application/Interfaces/IServiceManagementService.cs
index cee25ab..801275d 100644
--- a/SPMS.Application/Interfaces/IServiceManagementService.cs
+++ b/SPMS.Application/Interfaces/IServiceManagementService.cs
@@ -12,6 +12,7 @@ public interface IServiceManagementService
     Task<ServiceResponseDto> GetByServiceCodeAsync(string serviceCode);
     Task DeleteAsync(DeleteServiceRequestDto request);
     Task<ServiceResponseDto> ChangeStatusAsync(string serviceCode, ChangeServiceStatusRequestDto request);
+    Task<ApiKeyRefreshResponseDto> ViewApiKeyAsync(string serviceCode);
     Task<ApiKeyRefreshResponseDto> RefreshApiKeyAsync(string serviceCode);
     Task RegisterApnsCredentialsAsync(string serviceCode, ApnsCredentialsRequestDto request);
     Task RegisterFcmCredentialsAsync(string serviceCode, FcmCredentialsRequestDto request);
diff --git a/SPMS.Application/Services/ServiceManagementService.cs b/SPMS.Application/Services/ServiceManagementService.cs
index 1822be2..a2eee0b 100644
--- a/SPMS.Application/Services/ServiceManagementService.cs
+++ b/SPMS.Application/Services/ServiceManagementService.cs
@@ -314,6 +314,25 @@ public class ServiceManagementService : IServiceManagementService
         return MapToDto(service);
     }
 
+    public async Task<ApiKeyRefreshResponseDto> ViewApiKeyAsync(string serviceCode)
+    {
+        var service = await _serviceRepository.GetByServiceCodeAsync(serviceCode);
+        if (service is null)
+        {
+            throw new SpmsException(
+                ErrorCodes.NotFound,
+                "서비스를 찾을 수 없습니다.",
+                404);
+        }
+
+        return new ApiKeyRefreshResponseDto
+        {
+            ServiceCode = service.ServiceCode,
+            ApiKey = service.ApiKey,
+            ApiKeyCreatedAt = service.ApiKeyCreatedAt
+        };
+    }
+
     public async Task<ApiKeyRefreshResponseDto> RefreshApiKeyAsync(string serviceCode)
     {
         var service = await _serviceRepository.GetByServiceCodeAsync(serviceCode);
@@ -981,7 +1000,7 @@ public class ServiceManagementService : IServiceManagementService
             ServiceCode = service.ServiceCode,
             ServiceName = service.ServiceName,
             Description = service.Description,
-            ApiKey = service.ApiKey,
+            ApiKey = MaskApiKey(service.ApiKey),
             ApiKeyCreatedAt = service.ApiKeyCreatedAt,
             ApnsBundleId = service.ApnsBundleId,
             ApnsKeyId = service.ApnsKeyId,
@@ -1003,6 +1022,20 @@ public class ServiceManagementService : IServiceManagementService
         };
     }
 
+    /// <summary>
+    /// API Key를 마스킹합니다 (앞 8자 노출 + ********).
+    /// </summary>
+    private static string MaskApiKey(string apiKey)
+    {
+        if (string.IsNullOrEmpty(apiKey))
+            return string.Empty;
+
+        if (apiKey.Length <= 8)
+            return new string('*', apiKey.Length);
+
+        return apiKey[..8] + "********";
+    }
+
     /// <summary>
     /// 서비스의 플랫폼 자격증명 상태를 판정하여 PlatformSummaryDto를 반환합니다.
     /// Android: FcmCredentials 유무로 판정