diff --git a/Makefile b/Makefile
index be0afeff0..23f10831a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,6 @@
 android_project_root := ./native/android
 android_generated_source_path := $(android_project_root)/lib/build/generated/source
 jni_libs_root := $(android_project_root)/lib/src/main/jniLibs
-udl_path := wp_api/src/wp_api.udl
 
 # The directory where the git repo is mounted in the docker container
 docker_container_repo_dir=/app
@@ -35,7 +34,7 @@ bindings:
 
 	#wp_api
 	cargo run --release --bin uniffi_bindgen generate --library ./target/release/libwp_api.dylib --out-dir $(android_generated_source_path) --language kotlin
-	cargo run --release --bin uniffi_bindgen generate wp_api/src/wp_api.udl --out-dir ./target/swift-bindings --language swift
+	cargo run --release --bin uniffi_bindgen generate --library ./target/release/libwp_api.dylib --out-dir ./target/swift-bindings --language swift
 	cp target/swift-bindings/wp_api.swift native/swift/Sources/wordpress-api-wrapper/wp_api.swift
 	sed -i '' 's/wp_apiFFI/libwordpressFFI/g' native/swift/Sources/wordpress-api-wrapper/wp_api.swift
 
diff --git a/native/android/wp_api/src/androidTest/kotlin/rs/wordpress/wp_api/LibraryTest.kt b/native/android/wp_api/src/androidTest/kotlin/rs/wordpress/wp_api/LibraryTest.kt
index 7bac8a6cb..bfa1f4658 100644
--- a/native/android/wp_api/src/androidTest/kotlin/rs/wordpress/wp_api/LibraryTest.kt
+++ b/native/android/wp_api/src/androidTest/kotlin/rs/wordpress/wp_api/LibraryTest.kt
@@ -24,7 +24,7 @@ class LibraryTest {
     fun testBasicPostListRequest() {
         val request = library.postListRequest()
         assert(request.method == RequestMethod.GET)
-        assert(request.url == "$siteUrl/wp-json/wp/v2/posts?context=edit")
+        assert(request.url == "$siteUrl/wp-json/wp/v2/posts?context=edit&page=1&per_page=10")
     }
 
     @Test
diff --git a/native/android/wp_api/src/main/kotlin/rs/wordpress/wp_api/Library.kt b/native/android/wp_api/src/main/kotlin/rs/wordpress/wp_api/Library.kt
index 34080e37c..d41780132 100644
--- a/native/android/wp_api/src/main/kotlin/rs/wordpress/wp_api/Library.kt
+++ b/native/android/wp_api/src/main/kotlin/rs/wordpress/wp_api/Library.kt
@@ -17,7 +17,8 @@ class Library(siteUrl: String, authentication: WpAuthentication) {
     private val wpApiHelper = WpApiHelper(siteUrl, authentication)
     private val client = OkHttpClient()
 
-    fun postListRequest(): WpNetworkRequest = wpApiHelper.postListRequest(PostListParams())
+    fun postListRequest(): WpNetworkRequest =
+        wpApiHelper.postListRequest(PostListParams())
 
     fun makePostListRequest(): PostListResponse {
         val wpNetworkRequest = postListRequest()
@@ -32,7 +33,11 @@ class Library(siteUrl: String, authentication: WpAuthentication) {
         }
 
         client.newCall(requestBuilder.build()).execute().use { response ->
-            return WpNetworkResponse(response.body!!.bytes(), response.code.toUShort(), null)
+            return WpNetworkResponse(
+                body = response.body!!.bytes(),
+                statusCode = response.code.toUShort(),
+                headerMap = null
+            )
         }
     }
 }
diff --git a/native/swift/Sources/wordpress-api/WordPressAPI.swift b/native/swift/Sources/wordpress-api/WordPressAPI.swift
index befa53caa..63d0361ab 100644
--- a/native/swift/Sources/wordpress-api/WordPressAPI.swift
+++ b/native/swift/Sources/wordpress-api/WordPressAPI.swift
@@ -12,7 +12,7 @@ public struct WordPressAPI {
 
     public init(urlSession: URLSession, baseUrl: URL, authenticationStategy: WpAuthentication) {
         self.urlSession = urlSession
-        self.helper = WpApiHelper(url: baseUrl.absoluteString, authentication: authenticationStategy)
+        self.helper = WpApiHelper(siteUrl: baseUrl.absoluteString, authentication: authenticationStategy)
     }
 
     package func perform(request: WpNetworkRequest) async throws -> WpNetworkResponse {
diff --git a/wp_api/build.rs b/wp_api/build.rs
deleted file mode 100644
index 8dc1a561a..000000000
--- a/wp_api/build.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    uniffi::generate_scaffolding("src/wp_api.udl").unwrap();
-}
diff --git a/wp_api/src/api_error.rs b/wp_api/src/api_error.rs
index a398caab0..b2eaa0ad6 100644
--- a/wp_api/src/api_error.rs
+++ b/wp_api/src/api_error.rs
@@ -1,6 +1,6 @@
 use http::StatusCode;
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, uniffi::Error)]
 pub enum WPApiError {
     #[error(
         "Client error with type '{:?}' and status_code '{}'",
@@ -19,7 +19,7 @@ pub enum WPApiError {
     UnknownError,
 }
 
-#[derive(Debug)]
+#[derive(Debug, uniffi::Enum)]
 pub enum ClientErrorType {
     BadRequest,
     Unauthorized,
diff --git a/wp_api/src/lib.rs b/wp_api/src/lib.rs
index 0b158d30a..b4f4f8389 100644
--- a/wp_api/src/lib.rs
+++ b/wp_api/src/lib.rs
@@ -11,12 +11,15 @@ pub mod api_error;
 pub mod pages;
 pub mod posts;
 
+#[derive(uniffi::Object)]
 pub struct WPApiHelper {
     site_url: Url,
     authentication: WPAuthentication,
 }
 
+#[uniffi::export]
 impl WPApiHelper {
+    #[uniffi::constructor]
     pub fn new(site_url: String, authentication: WPAuthentication) -> Self {
         let url = Url::parse(site_url.as_str()).unwrap();
 
@@ -53,15 +56,10 @@ impl WPApiHelper {
             format!("Basic {}", self.authentication.auth_token),
         );
 
-        if let Some(page) = params.page {
-            url.query_pairs_mut()
-                .append_pair("page", page.to_string().as_str());
-        }
-
-        if let Some(per_page) = params.per_page {
-            url.query_pairs_mut()
-                .append_pair("per_page", per_page.to_string().as_str());
-        }
+        url.query_pairs_mut()
+            .append_pair("page", params.page.to_string().as_str());
+        url.query_pairs_mut()
+            .append_pair("per_page", params.per_page.to_string().as_str());
 
         WPNetworkRequest {
             method: RequestMethod::GET,
@@ -71,12 +69,13 @@ impl WPApiHelper {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, uniffi::Record)]
 // TODO: This will probably become an `enum` where we support multiple authentication types.
 pub struct WPAuthentication {
     pub auth_token: String,
 }
 
+#[derive(uniffi::Enum)]
 pub enum RequestMethod {
     GET,
     POST,
@@ -84,6 +83,7 @@ pub enum RequestMethod {
     DELETE,
 }
 
+#[derive(uniffi::Record)]
 pub struct WPNetworkRequest {
     pub method: RequestMethod,
     pub url: String,
@@ -95,9 +95,10 @@ pub struct WPNetworkRequest {
     pub header_map: Option<HashMap<String, String>>,
 }
 
+#[derive(uniffi::Record)]
 pub struct WPNetworkResponse {
-    pub status_code: u16,
     pub body: Vec<u8>,
+    pub status_code: u16,
     // TODO: We probably want to implement a specific type for these headers instead of using a
     // regular HashMap.
     //
@@ -106,6 +107,7 @@ pub struct WPNetworkResponse {
     pub header_map: Option<HashMap<String, String>>,
 }
 
+#[uniffi::export]
 pub fn parse_post_list_response(
     response: WPNetworkResponse,
 ) -> Result<PostListResponse, WPApiError> {
@@ -156,4 +158,4 @@ pub fn extract_link_header(response: &WPNetworkResponse) -> Option<String> {
     None
 }
 
-uniffi::include_scaffolding!("wp_api");
+uniffi::setup_scaffolding!("wp_api");
diff --git a/wp_api/src/pages.rs b/wp_api/src/pages.rs
index 834a13fa5..802c7af81 100644
--- a/wp_api/src/pages.rs
+++ b/wp_api/src/pages.rs
@@ -1,16 +1,15 @@
-pub struct PageRequestBuilder {}
-
+#[derive(uniffi::Record)]
 pub struct PageListParams {
     pub page: Option<u32>,
     pub per_page: Option<u32>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, uniffi::Record)]
 pub struct PageListResponse {
     pub page_list: Option<Vec<PageObject>>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, uniffi::Record)]
 pub struct PageObject {
     pub id: Option<u32>,
     pub title: Option<String>,
diff --git a/wp_api/src/posts.rs b/wp_api/src/posts.rs
index 23db6e618..e26ff66ca 100644
--- a/wp_api/src/posts.rs
+++ b/wp_api/src/posts.rs
@@ -2,70 +2,81 @@ use serde::{Deserialize, Serialize};
 
 pub trait PostNetworkingInterface: Send + Sync {}
 
-#[derive(Default)] // The default has `None` for all
+#[derive(Default, uniffi::Record)]
 pub struct PostListParams {
-    pub page: Option<u32>,
-    pub per_page: Option<u32>,
+    #[uniffi(default = 1)]
+    pub page: u32,
+    #[uniffi(default = 10)]
+    pub per_page: u32,
 }
 
+#[derive(uniffi::Record)]
 pub struct PostCreateParams {
     pub title: Option<String>,
     pub content: Option<String>,
 }
 
+#[derive(uniffi::Record)]
 pub struct PostRetrieveParams {
     pub password: Option<String>,
 }
 
+#[derive(uniffi::Record)]
 pub struct PostUpdateParams {
     pub title: Option<String>,
     pub content: Option<String>,
 }
 
+#[derive(uniffi::Record)]
 pub struct PostDeleteParams {
     pub force: Option<bool>,
 }
 
+#[derive(uniffi::Record)]
 pub struct PostListRequest {
     pub params: Option<String>,
 }
+#[derive(uniffi::Record)]
 pub struct PostCreateRequest {
     pub params: Option<String>,
 }
+#[derive(uniffi::Record)]
 pub struct PostRetrieveRequest {
     pub params: Option<String>,
 }
+#[derive(uniffi::Record)]
 pub struct PostUpdateRequest {
     pub params: Option<String>,
 }
+#[derive(uniffi::Record)]
 pub struct PostDeleteRequest {
     pub params: Option<String>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostListResponse {
     pub post_list: Option<Vec<PostObject>>,
     pub next_page: Option<String>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostCreateResponse {
     pub post: Option<PostObject>,
 }
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostRetrieveResponse {
     pub post: Option<PostObject>,
 }
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostUpdateResponse {
     pub post: Option<PostObject>,
 }
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostDeleteResponse {
     pub post: Option<PostObject>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostObject {
     pub id: Option<u32>,
     pub date: Option<String>,
@@ -92,19 +103,19 @@ pub struct PostObject {
     pub tags: Option<Vec<u32>>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostGuid {
     pub raw: Option<String>,
     pub rendered: Option<String>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostTitle {
     pub raw: Option<String>,
     pub rendered: Option<String>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostContent {
     pub raw: Option<String>,
     pub rendered: Option<String>,
@@ -112,14 +123,14 @@ pub struct PostContent {
     pub block_version: Option<u32>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostExcerpt {
     pub raw: Option<String>,
     pub rendered: Option<String>,
     pub protected: Option<bool>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, uniffi::Record)]
 pub struct PostMeta {
     pub footnotes: Option<String>,
 }
diff --git a/wp_api/src/wp_api.udl b/wp_api/src/wp_api.udl
deleted file mode 100644
index c13c70e3e..000000000
--- a/wp_api/src/wp_api.udl
+++ /dev/null
@@ -1,159 +0,0 @@
-namespace wp_api {
-  [Throws=WPApiError]
-  PostListResponse parse_post_list_response(WPNetworkResponse response);
-};
-
-enum ClientErrorType {
-    "BadRequest",
-    "Unauthorized",
-    "TooManyRequests",
-    "Other",
-};
-
-[Error]
-interface WPApiError {
-    ClientError(ClientErrorType error_type, u16 status_code);
-    ServerError(u16 status_code);
-    ParsingError(string reason, string response);
-    UnknownError();
-};
-
-dictionary WPAuthentication {
-  string auth_token;
-};
-
-enum RequestMethod {
-  "GET",
-  "POST",
-  "PUT",
-  "DELETE"
-};
-
-interface WPApiHelper {
-  constructor(string url, WPAuthentication authentication);
-  WPNetworkRequest post_list_request(PostListParams params);
-  WPNetworkRequest raw_request(string url);
-};
-
-dictionary WPNetworkRequest {
-  RequestMethod method;
-  string url;
-  record<string, string>? header_map;
-};
-
-dictionary WPNetworkResponse {
-  bytes body;
-  u16 status_code;
-  record<string, string>? header_map;
-};
-
-dictionary PostListResponse {
-  sequence<PostObject>? post_list;
-  string? next_page;
-};
-dictionary PostCreateResponse {
-  PostObject? post;
-};
-dictionary PostRetrieveResponse {
-  PostObject? post;
-};
-dictionary PostUpdateResponse {
-  PostObject? post;
-};
-dictionary PostDeleteResponse {
-  PostObject? post;
-};
-
-dictionary PostObject {
-  u32? id;
-  string? date;
-  string? date_gmt;
-  PostGuid? guid;
-  string? modified;
-  string? modified_gmt;
-  string? password;
-  string? slug;
-  string? status;
-  string? link;
-  PostTitle? title;
-  PostContent? content;
-  PostExcerpt? excerpt;
-  u32? author;
-  u32? featured_media;
-  string? comment_status;
-  string? ping_status;
-  boolean? sticky;
-  string? template;
-  string? format;
-  PostMeta? meta;
-  sequence<u32>? categories;
-  sequence<u32>? tags;
-};
-
-dictionary PostGuid {
-  string? raw;
-  string? rendered;
-};
-
-dictionary PostTitle {
-  string? raw;
-  string? rendered;
-};
-
-dictionary PostContent {
-  string? raw;
-  string? rendered;
-  boolean? protected;
-  u32? block_version;
-};
-
-dictionary PostExcerpt {
-  string? raw;
-  string? rendered;
-  boolean? protected;
-};
-
-dictionary PostMeta {
-  string? footnotes;
-};
-
-// We should check if it's possible to use the same params for update & create
-dictionary PostCreateParams {
-  string? title;
-  string? content;
-};
-
-dictionary PostListParams {
-  u32? page  = null;
-  u32? per_page = null;
-};
-
-dictionary PostRetrieveParams {
-  string? password;
-};
-
-dictionary PostUpdateParams {
-  string? title;
-  string? content;
-};
-
-dictionary PostDeleteParams {
-  boolean? force;
-};
-
-// ---------------------------------------------------------------------------
-
-dictionary PageListParams {
-  u32? page;
-  u32? per_page;
-};
-
-dictionary PageListResponse {
-  sequence<PageObject>? page_list;
-};
-
-dictionary PageObject {
-  u32? id;
-  string? title;
-  string? content;
-};