diff --git a/crates/challenge-sdk-wasm/src/error.rs b/crates/challenge-sdk-wasm/src/error.rs
new file mode 100644
index 00000000..54f22a11
--- /dev/null
+++ b/crates/challenge-sdk-wasm/src/error.rs
@@ -0,0 +1,35 @@
+use alloc::boxed::Box;
+use alloc::format;
+use alloc::string::String;
+use core::fmt;
+
+#[derive(Debug)]
+pub enum ChallengeError {
+    Evaluation(String),
+    Validation(String),
+    Network(String),
+    Timeout(String),
+    Serialization(String),
+    Storage(String),
+    Internal(String),
+}
+
+impl fmt::Display for ChallengeError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            ChallengeError::Evaluation(msg) => write!(f, "Evaluation error: {}", msg),
+            ChallengeError::Validation(msg) => write!(f, "Validation error: {}", msg),
+            ChallengeError::Network(msg) => write!(f, "Network error: {}", msg),
+            ChallengeError::Timeout(msg) => write!(f, "Timeout: {}", msg),
+            ChallengeError::Serialization(msg) => write!(f, "Serialization error: {}", msg),
+            ChallengeError::Storage(msg) => write!(f, "Storage error: {}", msg),
+            ChallengeError::Internal(msg) => write!(f, "Internal error: {}", msg),
+        }
+    }
+}
+
+impl From<Box<bincode::ErrorKind>> for ChallengeError {
+    fn from(err: Box<bincode::ErrorKind>) -> Self {
+        ChallengeError::Serialization(format!("{}", err))
+    }
+}
diff --git a/crates/challenge-sdk-wasm/src/host_functions.rs b/crates/challenge-sdk-wasm/src/host_functions.rs
index 03f67414..73ebcbca 100644
--- a/crates/challenge-sdk-wasm/src/host_functions.rs
+++ b/crates/challenge-sdk-wasm/src/host_functions.rs
@@ -1,11 +1,16 @@
+use alloc::format;
 use alloc::vec;
 use alloc::vec::Vec;
 
+use crate::error::ChallengeError;
+use crate::types::{HttpRequest, HttpResponse};
+
 #[link(wasm_import_module = "platform_network")]
 extern "C" {
     fn http_get(req_ptr: i32, req_len: i32, resp_ptr: i32, resp_len: i32) -> i32;
     fn http_post(req_ptr: i32, req_len: i32, resp_ptr: i32, resp_len: i32, extra: i32) -> i32;
     fn dns_resolve(req_ptr: i32, req_len: i32, resp_ptr: i32) -> i32;
+    fn log_message(level: i32, msg_ptr: i32, msg_len: i32);
 }
 
 #[link(wasm_import_module = "platform_storage")]
@@ -14,6 +19,11 @@ extern "C" {
     fn storage_set(key_ptr: i32, key_len: i32, value_ptr: i32, value_len: i32) -> i32;
 }
 
+#[link(wasm_import_module = "platform_time")]
+extern "C" {
+    fn get_timestamp() -> i64;
+}
+
 #[link(wasm_import_module = "platform_terminal")]
 extern "C" {
     fn terminal_exec(cmd_ptr: i32, cmd_len: i32, result_ptr: i32, result_len: i32) -> i32;
@@ -106,6 +116,31 @@ pub fn host_storage_set(key: &[u8], value: &[u8]) -> Result<(), i32> {
     Ok(())
 }
 
+pub fn host_log(level: u8, message: &str) {
+    unsafe {
+        log_message(level as i32, message.as_ptr() as i32, message.len() as i32);
+    }
+}
+
+pub fn host_get_timestamp() -> i64 {
+    unsafe { get_timestamp() }
+}
+
+pub fn typed_http_get(request: &HttpRequest) -> Result<HttpResponse, ChallengeError> {
+    let encoded = bincode::serialize(request).map_err(ChallengeError::from)?;
+    let raw = host_http_get(&encoded)
+        .map_err(|code| ChallengeError::Network(format!("http_get failed with code {}", code)))?;
+    bincode::deserialize(&raw).map_err(ChallengeError::from)
+}
+
+pub fn typed_http_post(request: &HttpRequest) -> Result<HttpResponse, ChallengeError> {
+    let encoded = bincode::serialize(request).map_err(ChallengeError::from)?;
+    let body = &request.body;
+    let raw = host_http_post(&encoded, body)
+        .map_err(|code| ChallengeError::Network(format!("http_post failed with code {}", code)))?;
+    bincode::deserialize(&raw).map_err(ChallengeError::from)
+}
+
 pub fn host_terminal_exec(request: &[u8]) -> Result<Vec<u8>, i32> {
     let mut result_buf = vec![0u8; 262144];
     let status = unsafe {
diff --git a/crates/challenge-sdk-wasm/src/lib.rs b/crates/challenge-sdk-wasm/src/lib.rs
index 82e16686..c3a943fe 100644
--- a/crates/challenge-sdk-wasm/src/lib.rs
+++ b/crates/challenge-sdk-wasm/src/lib.rs
@@ -3,12 +3,16 @@
 extern crate alloc;
 
 pub mod alloc_impl;
+pub mod error;
 pub mod host_functions;
 pub mod term_types;
 pub mod types;
 
+pub use error::ChallengeError;
 pub use term_types::*;
-pub use types::{EvaluationInput, EvaluationOutput};
+pub use types::{
+    DetailedScore, EvaluationInput, EvaluationOutput, HttpRequest, HttpResponse, TaskResult,
+};
 
 pub trait Challenge {
     fn name(&self) -> &'static str;
diff --git a/crates/challenge-sdk-wasm/src/types.rs b/crates/challenge-sdk-wasm/src/types.rs
index 7036a615..9338cddd 100644
--- a/crates/challenge-sdk-wasm/src/types.rs
+++ b/crates/challenge-sdk-wasm/src/types.rs
@@ -7,6 +7,11 @@ pub struct EvaluationInput {
     pub agent_data: Vec<u8>,
     pub challenge_id: String,
     pub params: Vec<u8>,
+    pub submission_id: Option<String>,
+    pub participant_id: Option<String>,
+    pub epoch: Option<u64>,
+    pub metadata: Vec<u8>,
+    pub task_definitions: Vec<u8>,
     pub task_definition: Option<Vec<u8>>,
     pub environment_config: Option<Vec<u8>>,
 }
@@ -43,3 +48,33 @@ impl EvaluationOutput {
         self
     }
 }
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct HttpRequest {
+    pub url: String,
+    pub method: String,
+    pub headers: Vec<(String, String)>,
+    pub body: Vec<u8>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct HttpResponse {
+    pub status_code: u16,
+    pub headers: Vec<(String, String)>,
+    pub body: Vec<u8>,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct TaskResult {
+    pub passed: bool,
+    pub name: String,
+    pub message: String,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct DetailedScore {
+    pub score: f64,
+    pub tasks_passed: u32,
+    pub tasks_total: u32,
+    pub task_results: Vec<TaskResult>,
+}
diff --git a/crates/wasm-runtime-interface/src/bridge.rs b/crates/wasm-runtime-interface/src/bridge.rs
index d7cc69d0..6c1708ed 100644
--- a/crates/wasm-runtime-interface/src/bridge.rs
+++ b/crates/wasm-runtime-interface/src/bridge.rs
@@ -76,6 +76,11 @@ pub fn request_to_input(
         agent_data,
         challenge_id: challenge_id.to_string(),
         params,
+        submission_id: None,
+        participant_id: None,
+        epoch: None,
+        metadata: Vec::new(),
+        task_definitions: Vec::new(),
         task_definition: None,
         environment_config: None,
     })
@@ -162,6 +167,11 @@ mod tests {
             agent_data: vec![1, 2, 3],
             challenge_id: "test".into(),
             params: vec![4, 5, 6],
+            submission_id: None,
+            participant_id: None,
+            epoch: None,
+            metadata: Vec::new(),
+            task_definitions: Vec::new(),
             task_definition: None,
             environment_config: None,
         };