diff --git a/Cargo.lock b/Cargo.lock
index 66dd6b8c..a462ed03 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -75,6 +75,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
+[[package]]
+name = "bytes"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"
+
 [[package]]
 name = "cc"
 version = "1.0.83"
@@ -122,6 +128,35 @@ version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
 
+[[package]]
+name = "cxx"
+version = "1.0.110"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7129e341034ecb940c9072817cd9007974ea696844fc4dd582dc1653a7fbe2e8"
+dependencies = [
+ "cc",
+ "cxxbridge-flags",
+ "cxxbridge-macro",
+ "link-cplusplus",
+]
+
+[[package]]
+name = "cxxbridge-flags"
+version = "1.0.110"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06fdd177fc61050d63f67f5bd6351fac6ab5526694ea8e359cd9cd3b75857f44"
+
+[[package]]
+name = "cxxbridge-macro"
+version = "1.0.110"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "587663dd5fb3d10932c8aecfe7c844db1bcf0aee93eeab08fac13dc1212c2e7f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.39",
+]
+
 [[package]]
 name = "data-encoding"
 version = "2.5.0"
@@ -213,6 +248,12 @@ dependencies = [
  "cgmath",
 ]
 
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
 [[package]]
 name = "form_urlencoded"
 version = "1.2.1"
@@ -228,6 +269,17 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
+[[package]]
+name = "http"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8947b1a6fad4393052c7ba1f4cd97bed3e953a95c79c92ad9b051a04611d9fbb"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
 [[package]]
 name = "iana-time-zone"
 version = "0.1.58"
@@ -287,12 +339,14 @@ name = "kittycad-modeling-cmds"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "cxx",
  "data-encoding",
  "diesel",
  "diesel_derives",
  "enum-iterator",
  "enum-iterator-derive",
  "euler",
+ "http",
  "kittycad-unit-conversion-derive",
  "measurements",
  "parse-display",
@@ -326,6 +380,15 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ec2a862134d2a7d32d7983ddcdd1c4923530833c9f2ea1a44fc5fa473989058"
 
+[[package]]
+name = "link-cplusplus"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d240c6f7e1ba3a28b0249f774e6a9dd0175054b52dfbb61b16eb8505c3785c9"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "lock_api"
 version = "0.4.11"
diff --git a/modeling-cmds/Cargo.toml b/modeling-cmds/Cargo.toml
index a99eb50c..2661d32b 100644
--- a/modeling-cmds/Cargo.toml
+++ b/modeling-cmds/Cargo.toml
@@ -12,12 +12,14 @@ license = "MIT"
 
 [dependencies]
 chrono = "0.4.31"
+cxx = "1.0"
 data-encoding = "2.5.0"
 diesel = { version = "2.1.1", features = ["serde_json", "mysql", "chrono", "r2d2", "uuid", "numeric"] }
 diesel_derives = "2.1.2"
 enum-iterator = "1.4.1"
 enum-iterator-derive = "1.2.1"
 euler = "0.4.1"
+http = "0.2.9"
 kittycad-unit-conversion-derive = { path = "../unit-conversion-derive" }
 measurements = "0.11.0"
 parse-display = "0.8.2"
diff --git a/modeling-cmds/src/impl_extern_type.rs b/modeling-cmds/src/impl_extern_type.rs
new file mode 100644
index 00000000..05ea6885
--- /dev/null
+++ b/modeling-cmds/src/impl_extern_type.rs
@@ -0,0 +1,18 @@
+//! A little macro for easy implementation of cxx::ExternType
+
+/// This tells the c++ interop what the native c++ names are
+/// from https://docs.rs/cxx/latest/src/cxx/extern_type.rs.html
+#[macro_export]
+macro_rules! impl_extern_type {
+    ($([$kind:ident] $($(#[$($attr:tt)*])* $ty:path = $cxxpath:literal)*)*) => {
+        $($(
+            $(#[$($attr)*])*
+            unsafe impl cxx::ExternType for $ty {
+                #[allow(unused_attributes)] // incorrect lint; this doc(hidden) attr *is* respected by rustdoc
+                #[doc(hidden)]
+                type Id = cxx::type_id!($cxxpath);
+                type Kind = cxx::kind::$kind;
+            }
+        )*)*
+    };
+}
diff --git a/modeling-cmds/src/lib.rs b/modeling-cmds/src/lib.rs
index 6e299894..52ae0736 100644
--- a/modeling-cmds/src/lib.rs
+++ b/modeling-cmds/src/lib.rs
@@ -12,6 +12,7 @@ pub mod format;
 /// Modeling command IDs, used to associated requests and responses.
 /// Also used to construct commands which refer to previous commands.
 pub mod id;
+pub mod impl_extern_type;
 mod impl_traits;
 /// When a modeling command is successful, these responses could be returned.
 pub mod ok_response;
diff --git a/modeling-cmds/src/shared.rs b/modeling-cmds/src/shared.rs
index ea4b4f6a..09004d9f 100644
--- a/modeling-cmds/src/shared.rs
+++ b/modeling-cmds/src/shared.rs
@@ -7,7 +7,7 @@ use parse_display_derive::{Display, FromStr};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 
-use crate::units::UnitAngle;
+use crate::{impl_extern_type, units::UnitAngle};
 
 // A helper macro for allowing enums of only strings to be saved to the database.
 macro_rules! impl_string_enum_sql {
@@ -700,4 +700,53 @@ pub enum FileImportFormat {
     Stl,
 }
 
+/// The type of error sent by the KittyCAD graphics engine.
+/// A subset of [`ErrorCode`].
+#[derive(Display, FromStr, Copy, Eq, PartialEq, Debug, JsonSchema, Deserialize, Serialize, Clone, Ord, PartialOrd)]
+#[serde(rename_all = "snake_case")]
+pub enum EngineErrorCode {
+    /// User requested something geometrically or graphically impossible.
+    /// Don't retry this request, as it's inherently impossible. Instead, read the error message
+    /// and change your request.
+    BadRequest = 1,
+    /// Graphics engine failed to complete request, consider retrying
+    InternalEngine,
+}
+
+impl From<EngineErrorCode> for http::StatusCode {
+    fn from(e: EngineErrorCode) -> Self {
+        match e {
+            EngineErrorCode::BadRequest => Self::BAD_REQUEST,
+            EngineErrorCode::InternalEngine => Self::INTERNAL_SERVER_ERROR,
+        }
+    }
+}
+
 impl_string_enum_sql! {FileImportFormat}
+
+// Enum: Connect Rust Enums to Cpp
+// add our native c++ names for our cxx::ExternType implementation
+impl_extern_type! {
+    [Trivial]
+    // File
+    FileImportFormat = "Enums::_FileImportFormat"
+    FileExportFormat = "Enums::_FileExportFormat"
+    // Camera
+    CameraDragInteractionType = "Enums::_CameraDragInteractionType"
+    // Scene
+    SceneSelectionType = "Enums::_SceneSelectionType"
+    SceneToolType = "Enums::_SceneToolType"
+    EntityType = "Enums::_EntityType"
+    AnnotationType = "Enums::_AnnotationType"
+    AnnotationTextAlignmentX = "Enums::_AnnotationTextAlignmentX"
+    AnnotationTextAlignmentY = "Enums::_AnnotationTextAlignmentY"
+    AnnotationLineEnd = "Enums::_AnnotationLineEnd"
+
+    CurveType = "Enums::_CurveType"
+    PathCommand = "Enums::_PathCommand"
+    PathComponentConstraintBound = "Enums::_PathComponentConstraintBound"
+    PathComponentConstraintType = "Enums::_PathComponentConstraintType"
+
+    // Utils
+    EngineErrorCode = "Enums::_ErrorCode"
+}