diff --git a/nx/include/switch.h b/nx/include/switch.h
index 8b7e87dc..69550034 100644
--- a/nx/include/switch.h
+++ b/nx/include/switch.h
@@ -51,6 +51,7 @@ extern "C" {
 #include "switch/services/acc.h"
 #include "switch/services/apm.h"
 #include "switch/services/applet.h"
+#include "switch/services/async.h"
 #include "switch/services/audin.h"
 #include "switch/services/audout.h"
 #include "switch/services/audren.h"
diff --git a/nx/include/switch/services/async.h b/nx/include/switch/services/async.h
new file mode 100644
index 00000000..72f9beb9
--- /dev/null
+++ b/nx/include/switch/services/async.h
@@ -0,0 +1,112 @@
+/**
+ * @file async.h
+ * @brief NS/NIM IAsync* IPC wrapper.
+ * @author yellows8
+ * @copyright libnx Authors
+ */
+#pragma once
+#include "../types.h"
+#include "../applets/error.h"
+#include "../kernel/event.h"
+
+/// AsyncValue
+typedef struct {
+    Service s;      ///< IAsyncValue
+    Event event;    ///< Event with autoclear=false.
+} AsyncValue;
+
+/// AsyncResult
+typedef struct {
+    Service s;      ///< IAsyncResult
+    Event event;    ///< Event with autoclear=false.
+} AsyncResult;
+
+///@name IAsyncValue
+///@{
+
+/**
+ * @brief Close a \ref AsyncValue.
+ * @note When the object is initialized, this uses \ref asyncValueCancel then \ref asyncValueWait with timeout=U64_MAX.
+ * @param a \ref AsyncValue
+ */
+void asyncValueClose(AsyncValue *a);
+
+/**
+ * @brief Waits for the async operation to finish using the specified timeout.
+ * @param a \ref AsyncValue
+ * @param[in] timeout Timeout in nanoseconds. U64_MAX for no timeout.
+ */
+Result asyncValueWait(AsyncValue *a, u64 timeout);
+
+/**
+ * @brief Gets the value size.
+ * @param a \ref AsyncValue
+ * @param[out] size Output size.
+ */
+Result asyncValueGetSize(AsyncValue *a, u64 *size);
+
+/**
+ * @brief Gets the value.
+ * @note Prior to using the cmd, this uses \ref asyncResultWait with timeout=U64_MAX.
+ * @param a \ref AsyncValue
+ * @param[out] buffer Output buffer.
+ * @param[in] size Output buffer size.
+ */
+Result asyncValueGet(AsyncValue *a, void* buffer, size_t size);
+
+/**
+ * @brief Cancels the async operation.
+ * @note Used automatically by \ref asyncValueClose.
+ * @param a \ref AsyncValue
+ */
+Result asyncValueCancel(AsyncValue *a);
+
+/**
+ * @brief Gets the \ref ErrorContext.
+ * @param a \ref AsyncValue
+ * @param[out] context \ref ErrorContext
+ */
+Result asyncValueGetErrorContext(AsyncValue *a, ErrorContext *context);
+
+///@}
+
+///@name IAsyncResult
+///@{
+
+/**
+ * @brief Close a \ref AsyncResult.
+ * @note When the object is initialized, this uses \ref asyncResultCancel then \ref asyncResultWait with timeout=U64_MAX.
+ * @param a \ref AsyncResult
+ */
+void asyncResultClose(AsyncResult *a);
+
+/**
+ * @brief Waits for the async operation to finish using the specified timeout.
+ * @param a \ref AsyncResult
+ * @param[in] timeout Timeout in nanoseconds. U64_MAX for no timeout.
+ */
+Result asyncResultWait(AsyncResult *a, u64 timeout);
+
+/**
+ * @brief Gets the Result.
+ * @note Prior to using the cmd, this uses \ref asyncResultWait with timeout=U64_MAX.
+ * @param a \ref AsyncResult
+ */
+Result asyncResultGet(AsyncResult *a);
+
+/**
+ * @brief Cancels the async operation.
+ * @note Used automatically by \ref asyncResultClose.
+ * @param a \ref AsyncResult
+ */
+Result asyncResultCancel(AsyncResult *a);
+
+/**
+ * @brief Gets the \ref ErrorContext.
+ * @param a \ref AsyncResult
+ * @param[out] context \ref ErrorContext
+ */
+Result asyncResultGetErrorContext(AsyncResult *a, ErrorContext *context);
+
+///@}
+
diff --git a/nx/source/services/async.c b/nx/source/services/async.c
new file mode 100644
index 00000000..b9c19987
--- /dev/null
+++ b/nx/source/services/async.c
@@ -0,0 +1,115 @@
+#include "sf/service.h"
+#include "runtime/hosversion.h"
+#include "services/async.h"
+#include "applets/error.h"
+
+static Result _asyncCmdNoIO(Service* srv, u32 cmd_id) {
+    return serviceDispatch(srv, cmd_id);
+}
+
+static Result _asyncCmdNoInOutU64(Service* srv, u64 *out, u32 cmd_id) {
+    return serviceDispatchOut(srv, cmd_id, *out);
+}
+
+static Result _asyncCmdNoInOutBuf(Service* srv, void* buffer, size_t size, u32 cmd_id) {
+    return serviceDispatch(srv, cmd_id,
+        .buffer_attrs = { SfBufferAttr_HipcMapAlias | SfBufferAttr_Out },
+        .buffers = { { buffer, size } },
+    );
+}
+
+// IAsyncValue
+
+void asyncValueClose(AsyncValue *a) {
+    if (serviceIsActive(&a->s)) {
+        asyncValueCancel(a); // Official sw ignores rc from this prior to waiting on the event.
+        asyncValueWait(a, U64_MAX);
+    }
+
+    serviceClose(&a->s);
+    eventClose(&a->event);
+}
+
+Result asyncValueWait(AsyncValue *a, u64 timeout) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return eventWait(&a->event, timeout);
+}
+
+Result asyncValueGetSize(AsyncValue *a, u64 *size) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return _asyncCmdNoInOutU64(&a->s, size, 0);
+}
+
+Result asyncValueGet(AsyncValue *a, void* buffer, size_t size) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    Result rc = asyncValueWait(a, U64_MAX);
+    if (R_SUCCEEDED(rc)) rc = _asyncCmdNoInOutBuf(&a->s, buffer, size, 1);
+    return rc;
+}
+
+Result asyncValueCancel(AsyncValue *a) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return _asyncCmdNoIO(&a->s, 2);
+}
+
+Result asyncValueGetErrorContext(AsyncValue *a, ErrorContext *context) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+    if (hosversionBefore(4,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    return _asyncCmdNoInOutBuf(&a->s, context, sizeof(*context), 3);
+}
+
+// AsyncResult
+
+void asyncResultClose(AsyncResult *a) {
+    if (serviceIsActive(&a->s)) {
+        asyncResultCancel(a); // Official sw ignores rc from this prior to waiting on the event.
+        asyncResultWait(a, U64_MAX);
+    }
+
+    serviceClose(&a->s);
+    eventClose(&a->event);
+}
+
+Result asyncResultWait(AsyncResult *a, u64 timeout) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return eventWait(&a->event, timeout);
+}
+
+Result asyncResultGet(AsyncResult *a) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    Result rc = asyncResultWait(a, U64_MAX);
+    if (R_SUCCEEDED(rc)) rc = _asyncCmdNoIO(&a->s, 0);
+    return rc;
+}
+
+Result asyncResultCancel(AsyncResult *a) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+
+    return _asyncCmdNoIO(&a->s, 1);
+}
+
+Result asyncResultGetErrorContext(AsyncResult *a, ErrorContext *context) {
+    if (!serviceIsActive(&a->s))
+        return MAKERESULT(Module_Libnx, LibnxError_NotInitialized);
+    if (hosversionBefore(4,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    return _asyncCmdNoInOutBuf(&a->s, context, sizeof(*context), 2);
+}
+