diff --git a/Iceshrimp.Backend/Controllers/AdminController.cs b/Iceshrimp.Backend/Controllers/AdminController.cs
index c731e0a3..66e7deb6 100644
--- a/Iceshrimp.Backend/Controllers/AdminController.cs
+++ b/Iceshrimp.Backend/Controllers/AdminController.cs
@@ -139,9 +139,10 @@ public class AdminController(
 	[HttpGet("activities/fetch")]
 	[ProducesResponseType(StatusCodes.Status200OK, Type = typeof(ASObject))]
 	[Produces("application/activity+json", "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"")]
-	public async Task<IActionResult> FetchActivityAsync([FromQuery] string uri)
+	public async Task<IActionResult> FetchActivityAsync([FromQuery] string uri, [FromQuery] string? userId)
 	{
-		var activity = await fetchSvc.FetchActivityAsync(uri);
+		var user = userId != null ? await db.Users.FirstOrDefaultAsync(p => p.Id == userId && p.Host == null) : null;
+		var activity = await fetchSvc.FetchActivityAsync(uri, user);
 		if (!activity.Any()) throw GracefulException.UnprocessableEntity("Failed to fetch activity");
 		return Ok(LdHelpers.Compact(activity));
 	}
@@ -151,9 +152,10 @@ public class AdminController(
 	[ProducesResponseType(StatusCodes.Status200OK, Type = typeof(ASObject))]
 	[ProducesResponseType(StatusCodes.Status422UnprocessableEntity, Type = typeof(ErrorResponse))]
 	[Produces("application/activity+json", "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"")]
-	public async Task FetchRawActivityAsync([FromQuery] string uri)
+	public async Task FetchRawActivityAsync([FromQuery] string uri, [FromQuery] string? userId)
 	{
-		var activity = await fetchSvc.FetchRawActivityAsync(uri);
+		var user = userId != null ? await db.Users.FirstOrDefaultAsync(p => p.Id == userId && p.Host == null) : null;
+		var activity = await fetchSvc.FetchRawActivityAsync(uri, user);
 		if (activity == null) throw GracefulException.UnprocessableEntity("Failed to fetch activity");
 
 		Response.ContentType = Request.Headers.Accept.Any(p => p != null && p.StartsWith("application/ld+json"))
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityFetcherService.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityFetcherService.cs
index dfb70189..dcce2718 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityFetcherService.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityFetcherService.cs
@@ -36,9 +36,19 @@ public class ActivityFetcherService(
 		return await FetchActivityAsync(url, actor, keypair);
 	}
 
-	public async Task<string?> FetchRawActivityAsync(string url)
+	public async Task<IEnumerable<ASObject>> FetchActivityAsync(string url, User? actor)
 	{
-		var (actor, keypair) = await systemUserSvc.GetInstanceActorWithKeypairAsync();
+		var keypair = actor != null ? await db.UserKeypairs.FirstOrDefaultAsync(p => p.User == actor) : null;
+		if (actor == null || keypair == null)
+			(actor, keypair) = await systemUserSvc.GetInstanceActorWithKeypairAsync();
+		return await FetchActivityAsync(url, actor, keypair);
+	}
+
+	public async Task<string?> FetchRawActivityAsync(string url, User? actor)
+	{
+		var keypair = actor != null ? await db.UserKeypairs.FirstOrDefaultAsync(p => p.User == actor) : null;
+		if (actor == null || keypair == null)
+			(actor, keypair) = await systemUserSvc.GetInstanceActorWithKeypairAsync();
 		return await FetchRawActivityAsync(url, actor, keypair);
 	}
 
@@ -78,7 +88,7 @@ public class ActivityFetcherService(
 		var requestHost = new Uri(url).Host;
 		if (requestHost == config.Value.WebDomain || requestHost == config.Value.AccountDomain)
 			throw GracefulException.UnprocessableEntity("Refusing to fetch activity from local domain");
-		
+
 		if (await fedCtrlSvc.ShouldBlockAsync(requestHost))
 		{
 			logger.LogDebug("Refusing to fetch activity from blocked instance");