diff --git a/gateway-types/src/lib.rs b/gateway-types/src/lib.rs
index 6da5370..7c64ec2 100644
--- a/gateway-types/src/lib.rs
+++ b/gateway-types/src/lib.rs
@@ -53,7 +53,7 @@ pub struct KeyPackageResult {
     /// A message relating to the operation
     pub message: String,
     /// A list of key packages
-    pub key_packages: Vec<Bytes>,
+    pub installation: Vec<Bytes>,
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq)]
diff --git a/registry/src/lib.rs b/registry/src/lib.rs
index 64a0d68..4159704 100644
--- a/registry/src/lib.rs
+++ b/registry/src/lib.rs
@@ -69,7 +69,7 @@ where
         Ok(KeyPackageResult {
             status: Status::Completed,
             message: "Key packages retrieved".to_string(),
-            key_packages: properties
+            installation: properties
                 .into_iter()
                 .map(TryFrom::try_from)
                 .collect::<Result<_, _>>()?,
diff --git a/xps-gateway/src/rpc/api.rs b/xps-gateway/src/rpc/api.rs
index 2ec242d..85abf69 100644
--- a/xps-gateway/src/rpc/api.rs
+++ b/xps-gateway/src/rpc/api.rs
@@ -222,6 +222,91 @@ pub trait Xps {
         signature: Signature,
     ) -> Result<(), ErrorObjectOwned>;
 
+    /// ## JSON-RPC Endpoint Documentation
+    ///
+    /// #### Request:
+    ///
+    /// - **Method:** `POST`
+    /// - **URL:** `/rpc/v1/fetchKeyPackages`
+    /// - **Headers:**
+    ///   - `Content-Type: application/json`
+    /// - **Body:**
+    ///   - **JSON Object:**
+    ///     - `jsonrpc`: `"2.0"`
+    ///     - `method`: `"fetchKeyPackages"`
+    ///     - `params`: Array (optional parameters as required)
+    ///     - `id`: Request identifier (integer or string)
+    ///
+    /// ### Endpoint: `fetchKeyPackages`
+    ///
+    /// #### Description
+    ///
+    /// The `fetchKeyPackages` endpoint is responsible for retrieving the contact bundle for the XMTP device installations. The request must be made to a valid did with an XMTP profile.
+    ///
+    /// #### Request
+    ///
+    /// The request for this endpoint should contain a valid DID. All returned information is public.
+    ///
+    /// ##### Parameters:
+    ///
+    /// -   `DID` (string): Unique XMTP identifier for the user requesting the installation.
+    ///
+    /// ##### Example Request:
+    ///
+    /// ```json
+    /// {
+    ///     "jsonrpc": "2.0",
+    ///     "method": "fetchKeyPackages",
+    ///     "params": {
+    ///         "did": "12345"
+    ///     },
+    ///     "id": 1
+    /// }
+    /// ```
+    ///
+    /// #### Response
+    ///
+    /// The response will provide an optionally empty list of installation bundles.
+    ///
+    /// ##### Result Fields:
+    ///
+    /// -   `status` (string): The status of the request, e.g., 'success'.
+    /// -   `installation` (array): Array of installation bundles.
+    ///
+    /// ##### Example Response:
+    ///
+    /// ```json
+    /// {
+    ///     "jsonrpc": "2.0",
+    ///     "result": {
+    ///         "status": "success",
+    ///         "installation": ["bundle1...", "bundle2..."]
+    ///     },
+    ///     "id": 1
+    /// }
+    /// ```
+    ///
+    /// #### Error Handling
+    ///
+    /// In case of an error, the response will include an error object with details.
+    ///
+    /// ##### Error Object Fields:
+    ///
+    /// -   `code` (integer): Numeric code representing the error type.
+    /// -   `message` (string): Description of the error.
+    ///
+    /// ##### Example Error Response:
+    ///
+    /// ```json
+    /// {
+    ///     "jsonrpc": "2.0",
+    ///     "error": {
+    ///         "code": 403,
+    ///         "message": "User not authorized for installation."
+    ///     },
+    ///     "id": 1
+    /// }
+    /// ```
     #[method(name = "fetchKeyPackages")]
     async fn fetch_key_packages(&self, did: String) -> Result<KeyPackageResult, ErrorObjectOwned>;
 
diff --git a/xps-gateway/tests/integration_test.rs b/xps-gateway/tests/integration_test.rs
index de580e6..b73e45b 100644
--- a/xps-gateway/tests/integration_test.rs
+++ b/xps-gateway/tests/integration_test.rs
@@ -198,7 +198,7 @@ async fn test_fetch_key_packages() -> Result<(), Error> {
         assert_eq!(res.status, Status::Completed);
         assert_eq!(&res.message, "Key packages retrieved");
         assert_eq!(
-            res.key_packages,
+            res.installation,
             vec![
                 b"000000000000000000000000000000000000000000000000000000000000000000",
                 b"111111111111111111111111111111111111111111111111111111111111111111"
@@ -241,7 +241,7 @@ async fn test_fetch_key_packages_revoke() -> Result<(), Error> {
         assert_eq!(res.status, Status::Completed);
         assert_eq!(&res.message, "Key packages retrieved");
         assert_eq!(
-            res.key_packages,
+            res.installation,
             vec![hex::decode(
                 b"000000000000000000000000000000000000000000000000000000000000000000"
             )
@@ -284,7 +284,7 @@ async fn test_fetch_key_packages_client() -> Result<(), Error> {
         assert_eq!(res.status, Status::Completed);
         assert_eq!(&res.message, "Key packages retrieved");
         assert_eq!(
-            res.key_packages,
+            res.installation,
             vec![b"000000000000000000000000000000000000000000000000000000000000000000"]
         );