diff --git a/Cargo.toml b/Cargo.toml
index ea1daba..883f820 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,10 +4,11 @@ version = "0.0.1"
 edition = "2021"
 
 [features]
-default = ["http"]
+default = ["http", "anyhow"]
 http = ["hyper", "http-body-util", "hyper-util", "tokio/net", "tokio/signal", "restate-sdk-shared-core/http"]
 
 [dependencies]
+anyhow = {version = "1.0", optional = true}
 bytes = "1.6.1"
 futures = "0.3"
 http-body-util = { version = "0.1", optional = true }
diff --git a/src/errors.rs b/src/errors.rs
index 73017dd..0bf4f96 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -32,6 +32,13 @@ impl StdError for HandlerErrorInner {
 #[derive(Debug)]
 pub struct HandlerError(pub(crate) HandlerErrorInner);
 
+impl HandlerError {
+    #[cfg(feature = "anyhow")]
+    pub fn from_anyhow(err: anyhow::Error) -> Self {
+        Self(HandlerErrorInner::Retryable(err.into()))
+    }
+}
+
 impl<E: StdError + Send + Sync + 'static> From<E> for HandlerError {
     fn from(value: E) -> Self {
         Self(HandlerErrorInner::Retryable(Box::new(value)))
@@ -44,6 +51,7 @@ impl From<TerminalError> for HandlerError {
     }
 }
 
+// Took from anyhow
 impl AsRef<dyn StdError + Send + Sync> for HandlerError {
     fn as_ref(&self) -> &(dyn StdError + Send + Sync + 'static) {
         &self.0
diff --git a/src/serde.rs b/src/serde.rs
index e5f521b..bae9065 100644
--- a/src/serde.rs
+++ b/src/serde.rs
@@ -139,7 +139,7 @@ impl_serde_primitives!(f64);
 
 // --- Json responses
 
-pub struct Json<T>(T);
+pub struct Json<T>(pub T);
 
 impl<T> Json<T> {
     pub fn into_inner(self) -> T {
diff --git a/test-services/Cargo.toml b/test-services/Cargo.toml
index d558786..0b2a469 100644
--- a/test-services/Cargo.toml
+++ b/test-services/Cargo.toml
@@ -5,8 +5,10 @@ edition = "2021"
 publish = false
 
 [dependencies]
+anyhow = "1.0"
 tokio = { version = "1", features = ["full"] }
 tracing-subscriber = "0.3"
+futures = "0.3"
 restate-sdk = { path = ".." }
 serde = { version = "1", features = ["derive"] }
 tracing = "0.1.40"
\ No newline at end of file
diff --git a/test-services/exclusions.yaml b/test-services/exclusions.yaml
index efad6cd..c9b30bd 100644
--- a/test-services/exclusions.yaml
+++ b/test-services/exclusions.yaml
@@ -1,49 +1,39 @@
 exclusions:
   "alwaysSuspending":
-  - "dev.restate.sdktesting.tests.AwaitTimeout"
-  - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
-  - "dev.restate.sdktesting.tests.SideEffect"
-  - "dev.restate.sdktesting.tests.Sleep"
-  - "dev.restate.sdktesting.tests.SleepWithFailures"
-  - "dev.restate.sdktesting.tests.State"
-  - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
-  - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
-  - "dev.restate.sdktesting.tests.UserErrors"
-  - "dev.restate.sdktesting.tests.WorkflowAPI"
+    - "dev.restate.sdktesting.tests.AwaitTimeout"
+    - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
+    - "dev.restate.sdktesting.tests.SideEffect"
+    - "dev.restate.sdktesting.tests.Sleep"
+    - "dev.restate.sdktesting.tests.SleepWithFailures"
+    - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
+    - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
+    - "dev.restate.sdktesting.tests.UserErrors"
+    - "dev.restate.sdktesting.tests.WorkflowAPI"
   "default":
-  - "dev.restate.sdktesting.tests.AwaitTimeout"
-  - "dev.restate.sdktesting.tests.CallOrdering"
-  - "dev.restate.sdktesting.tests.CancelInvocation"
-  - "dev.restate.sdktesting.tests.Ingress"
-  - "dev.restate.sdktesting.tests.KafkaIngress"
-  - "dev.restate.sdktesting.tests.KillInvocation"
-  - "dev.restate.sdktesting.tests.PrivateService"
-  - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
-  - "dev.restate.sdktesting.tests.Sleep"
-  - "dev.restate.sdktesting.tests.SleepWithFailures"
-  - "dev.restate.sdktesting.tests.State"
-  - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
-  - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
-  - "dev.restate.sdktesting.tests.UserErrors"
-  - "dev.restate.sdktesting.tests.WorkflowAPI"
-  "lazyState":
-  - "dev.restate.sdktesting.tests.State"
+    - "dev.restate.sdktesting.tests.AwaitTimeout"
+    - "dev.restate.sdktesting.tests.CallOrdering"
+    - "dev.restate.sdktesting.tests.CancelInvocation"
+    - "dev.restate.sdktesting.tests.Ingress"
+    - "dev.restate.sdktesting.tests.KillInvocation"
+    - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
+    - "dev.restate.sdktesting.tests.Sleep"
+    - "dev.restate.sdktesting.tests.SleepWithFailures"
+    - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
+    - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
+    - "dev.restate.sdktesting.tests.UserErrors"
+    - "dev.restate.sdktesting.tests.WorkflowAPI"
   "persistedTimers":
-  - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
-  - "dev.restate.sdktesting.tests.Sleep"
+    - "dev.restate.sdktesting.tests.Sleep"
   "singleThreadSinglePartition":
-  - "dev.restate.sdktesting.tests.AwaitTimeout"
-  - "dev.restate.sdktesting.tests.CallOrdering"
-  - "dev.restate.sdktesting.tests.CancelInvocation"
-  - "dev.restate.sdktesting.tests.Ingress"
-  - "dev.restate.sdktesting.tests.KafkaIngress"
-  - "dev.restate.sdktesting.tests.KillInvocation"
-  - "dev.restate.sdktesting.tests.PrivateService"
-  - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
-  - "dev.restate.sdktesting.tests.Sleep"
-  - "dev.restate.sdktesting.tests.SleepWithFailures"
-  - "dev.restate.sdktesting.tests.State"
-  - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
-  - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
-  - "dev.restate.sdktesting.tests.UserErrors"
-  - "dev.restate.sdktesting.tests.WorkflowAPI"
+    - "dev.restate.sdktesting.tests.AwaitTimeout"
+    - "dev.restate.sdktesting.tests.CallOrdering"
+    - "dev.restate.sdktesting.tests.CancelInvocation"
+    - "dev.restate.sdktesting.tests.Ingress"
+    - "dev.restate.sdktesting.tests.KillInvocation"
+    - "dev.restate.sdktesting.tests.ServiceToServiceCommunication"
+    - "dev.restate.sdktesting.tests.Sleep"
+    - "dev.restate.sdktesting.tests.SleepWithFailures"
+    - "dev.restate.sdktesting.tests.UpgradeWithInFlightInvocation"
+    - "dev.restate.sdktesting.tests.UpgradeWithNewInvocation"
+    - "dev.restate.sdktesting.tests.UserErrors"
+    - "dev.restate.sdktesting.tests.WorkflowAPI"
diff --git a/test-services/src/main.rs b/test-services/src/main.rs
index 3c69d9e..96ff8cb 100644
--- a/test-services/src/main.rs
+++ b/test-services/src/main.rs
@@ -1,4 +1,6 @@
 mod counter;
+mod map_object;
+mod proxy;
 
 use restate_sdk::prelude::{Endpoint, HyperServer};
 use std::env;
@@ -14,6 +16,12 @@ async fn main() {
     if services == "*" || services.contains("Counter") {
         builder = builder.with_service(counter::Counter::serve(counter::CounterImpl))
     }
+    if services == "*" || services.contains("Proxy") {
+        builder = builder.with_service(proxy::Proxy::serve(proxy::ProxyImpl))
+    }
+    if services == "*" || services.contains("MapObject") {
+        builder = builder.with_service(map_object::MapObject::serve(map_object::MapObjectImpl))
+    }
 
     HyperServer::new(builder.build())
         .listen_and_serve(format!("0.0.0.0:{port}").parse().unwrap())
diff --git a/test-services/src/map_object.rs b/test-services/src/map_object.rs
new file mode 100644
index 0000000..4bc4320
--- /dev/null
+++ b/test-services/src/map_object.rs
@@ -0,0 +1,55 @@
+use anyhow::anyhow;
+use restate_sdk::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub(crate) struct Entry {
+    key: String,
+    value: String,
+}
+
+#[restate_sdk::object]
+#[name = "MapObject"]
+pub(crate) trait MapObject {
+    #[name = "set"]
+    async fn set(entry: Json<Entry>) -> HandlerResult<()>;
+    #[name = "get"]
+    async fn get(key: String) -> HandlerResult<String>;
+    #[name = "clearAll"]
+    async fn clear_all() -> HandlerResult<Json<Vec<Entry>>>;
+}
+
+pub(crate) struct MapObjectImpl;
+
+impl MapObject for MapObjectImpl {
+    async fn set(
+        &self,
+        ctx: ObjectContext<'_>,
+        Json(Entry { key, value }): Json<Entry>,
+    ) -> HandlerResult<()> {
+        ctx.set(&key, value);
+        Ok(())
+    }
+
+    async fn get(&self, ctx: ObjectContext<'_>, key: String) -> HandlerResult<String> {
+        Ok(ctx.get(&key).await?.unwrap_or_default())
+    }
+
+    async fn clear_all(&self, ctx: ObjectContext<'_>) -> HandlerResult<Json<Vec<Entry>>> {
+        let keys = ctx.get_keys().await?;
+
+        let mut entries = vec![];
+        for k in keys {
+            let value = ctx
+                .get(&k)
+                .await?
+                .ok_or_else(|| HandlerError::from_anyhow(anyhow!("Missing key {k}")))?;
+            entries.push(Entry { key: k, value })
+        }
+
+        ctx.clear_all();
+
+        Ok(entries.into())
+    }
+}
diff --git a/test-services/src/proxy.rs b/test-services/src/proxy.rs
new file mode 100644
index 0000000..2fbe234
--- /dev/null
+++ b/test-services/src/proxy.rs
@@ -0,0 +1,107 @@
+use futures::future::BoxFuture;
+use futures::FutureExt;
+use restate_sdk::context::RequestTarget;
+use restate_sdk::prelude::*;
+use serde::{Deserialize, Serialize};
+use std::time::Duration;
+
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub(crate) struct ProxyRequest {
+    service_name: String,
+    virtual_object_key: Option<String>,
+    handler_name: String,
+    message: Vec<u8>,
+    delay_millis: Option<u64>,
+}
+
+impl ProxyRequest {
+    fn to_target(&self) -> RequestTarget {
+        if let Some(key) = &self.virtual_object_key {
+            RequestTarget::Object {
+                name: self.service_name.clone(),
+                key: key.clone(),
+                handler: self.handler_name.clone(),
+            }
+        } else {
+            RequestTarget::Service {
+                name: self.service_name.clone(),
+                handler: self.handler_name.clone(),
+            }
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub(crate) struct ManyCallRequest {
+    proxy_request: ProxyRequest,
+    one_way_call: bool,
+    await_at_the_end: bool,
+}
+
+#[restate_sdk::service]
+#[name = "Proxy"]
+pub(crate) trait Proxy {
+    #[name = "call"]
+    async fn call(req: Json<ProxyRequest>) -> HandlerResult<Json<Vec<u8>>>;
+    #[name = "oneWayCall"]
+    async fn one_way_call(req: Json<ProxyRequest>) -> HandlerResult<()>;
+    #[name = "manyCalls"]
+    async fn many_calls(req: Json<Vec<ManyCallRequest>>) -> HandlerResult<()>;
+}
+
+pub(crate) struct ProxyImpl;
+
+impl Proxy for ProxyImpl {
+    async fn call(
+        &self,
+        ctx: Context<'_>,
+        Json(req): Json<ProxyRequest>,
+    ) -> HandlerResult<Json<Vec<u8>>> {
+        Ok(ctx.call(req.to_target(), req.message).await?)
+    }
+
+    async fn one_way_call(
+        &self,
+        ctx: Context<'_>,
+        Json(req): Json<ProxyRequest>,
+    ) -> HandlerResult<()> {
+        ctx.send(
+            req.to_target(),
+            req.message,
+            req.delay_millis.map(Duration::from_millis),
+        );
+        Ok(())
+    }
+
+    async fn many_calls(
+        &self,
+        ctx: Context<'_>,
+        Json(requests): Json<Vec<ManyCallRequest>>,
+    ) -> HandlerResult<()> {
+        let mut futures: Vec<BoxFuture<'_, Result<Vec<u8>, TerminalError>>> = vec![];
+
+        for req in requests {
+            if req.one_way_call {
+                ctx.send(
+                    req.proxy_request.to_target(),
+                    req.proxy_request.message,
+                    req.proxy_request.delay_millis.map(Duration::from_millis),
+                );
+            } else {
+                let fut = ctx
+                    .call::<_, Vec<u8>>(req.proxy_request.to_target(), req.proxy_request.message);
+                if req.await_at_the_end {
+                    futures.push(fut.boxed())
+                }
+            }
+        }
+
+        for fut in futures {
+            fut.await?;
+        }
+
+        Ok(())
+    }
+}