diff --git a/lazer/Cargo.lock b/lazer/Cargo.lock
index cedf88bec3..286144e885 100644
--- a/lazer/Cargo.lock
+++ b/lazer/Cargo.lock
@@ -3190,7 +3190,7 @@ dependencies = [
 
 [[package]]
 name = "pyth-lazer-protocol"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "anyhow",
  "bincode",
diff --git a/lazer/sdk/rust/protocol/Cargo.toml b/lazer/sdk/rust/protocol/Cargo.toml
index 39ba1ab369..9162df803e 100644
--- a/lazer/sdk/rust/protocol/Cargo.toml
+++ b/lazer/sdk/rust/protocol/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "pyth-lazer-protocol"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 description = "Pyth Lazer SDK - protocol types."
 license = "Apache-2.0"
diff --git a/lazer/sdk/rust/protocol/src/api.rs b/lazer/sdk/rust/protocol/src/api.rs
new file mode 100644
index 0000000000..e29ad29fad
--- /dev/null
+++ b/lazer/sdk/rust/protocol/src/api.rs
@@ -0,0 +1,22 @@
+use serde::{Deserialize, Serialize};
+
+use crate::{payload::AggregatedPriceFeedData, router::PriceFeedId};
+
+/// A request sent from the client to the server.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type")]
+#[serde(rename_all = "camelCase")]
+pub enum ApiRequest {
+    LatestPrice(LatestPriceRequest),
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LatestPriceRequest {
+    pub price_feed_ids: Vec<PriceFeedId>,
+}
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct LatestPriceResponse {
+    pub price_feed_ids: Vec<AggregatedPriceFeedData>,
+}
diff --git a/lazer/sdk/rust/protocol/src/lib.rs b/lazer/sdk/rust/protocol/src/lib.rs
index 2f2f1e9f19..356fe00a43 100644
--- a/lazer/sdk/rust/protocol/src/lib.rs
+++ b/lazer/sdk/rust/protocol/src/lib.rs
@@ -1,5 +1,6 @@
 //! Protocol types.
 
+pub mod api;
 pub mod message;
 pub mod payload;
 pub mod publisher;
diff --git a/lazer/sdk/rust/protocol/src/payload.rs b/lazer/sdk/rust/protocol/src/payload.rs
index 7e08cf465d..1e56bfede4 100644
--- a/lazer/sdk/rust/protocol/src/payload.rs
+++ b/lazer/sdk/rust/protocol/src/payload.rs
@@ -5,6 +5,7 @@ use {
     crate::router::{ChannelId, Price},
     anyhow::bail,
     byteorder::{ByteOrder, ReadBytesExt, WriteBytesExt, BE, LE},
+    serde::{Deserialize, Serialize},
     std::{
         io::{Cursor, Read, Write},
         num::NonZeroI64,
@@ -35,7 +36,7 @@ pub enum PayloadPropertyValue {
     PublisherCount(Option<u16>),
 }
 
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct AggregatedPriceFeedData {
     pub price: Option<Price>,
     pub best_bid_price: Option<Price>,