Without wrappers

Arc’s participating controller actions normally return CommandResult or QueryResult envelopes. For an endpoint whose external contract must remain a native ASP.NET result, use [AspNetResult] on the controller or action.

Opt out on an action

This complete controller fragment assumes an ASP.NET Core Arc host with MVC registration and controller mapping:

using Cratis.Arc;
using Microsoft.AspNetCore.Mvc;

[ApiController]
[Route("api/status")]
public class StatusController : ControllerBase
{
    [HttpGet]
    [AspNetResult]
    public IActionResult Get() => Ok(new { State = "Running" });
}

The action’s result remains native ASP.NET output rather than an Arc envelope. Move [AspNetResult] above StatusController to apply it to every action on that controller.

Validation still applies

Opting out of response wrapping does not disable Arc’s model-state validation checks. Invalid model state can still prevent action execution. Likewise, do not treat the attribute as a way to bypass authentication or endpoint authorization. Test error responses as well as successful payloads when defining an external API contract.

Proxy generator

The proxy generator skips a controller action that carries [AspNetResult] itself; no Arc TypeScript proxy is generated for it. It checks the action only, not the controller: with [AspNetResult] on the controller class, its [HttpGet] and [HttpPost] actions still get proxies that expect Arc’s envelope and cannot read the native response. Put the attribute on each action when no proxy should exist, and supply a client appropriate to your unwrapped contract instead.

See also

• Controller commands
• Controller queries
• OpenAPI