diff --git a/src/agent.rs b/src/agent.rs
index 923a36e..955a005 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -61,7 +61,7 @@ pub async fn run(cli: &Cli) -> Result<()> {
 
     // Init clients
     let swym = SwymClient::new(&cli.swym_url)?;
-    let claude = ClaudeClient::new(&cli.anthropic_key, &cli.model);
+    let claude = ClaudeClient::new(&cli.anthropic_key, &cli.anthropic_url, &cli.model);
 
     // Check candle coverage for all instruments
     info!(
diff --git a/src/claude.rs b/src/claude.rs
index eb37414..cef64a9 100644
--- a/src/claude.rs
+++ b/src/claude.rs
@@ -6,6 +6,7 @@ use serde_json::Value;
 pub struct ClaudeClient {
     client: Client,
     api_key: String,
+    api_url: String,
     model: String,
 }
 
@@ -41,7 +42,7 @@ pub struct Usage {
 }
 
 impl ClaudeClient {
-    pub fn new(api_key: &str, model: &str) -> Self {
+    pub fn new(api_key: &str, api_url: &str, model: &str) -> Self {
         let client = Client::builder()
             .timeout(std::time::Duration::from_secs(120))
             .build()
@@ -49,6 +50,7 @@ impl ClaudeClient {
         Self {
             client,
             api_key: api_key.to_string(),
+            api_url: api_url.to_string(),
             model: model.to_string(),
         }
     }
@@ -66,9 +68,10 @@ impl ClaudeClient {
             messages: messages.to_vec(),
         };
 
+        let url = format!("{}/v1/messages", self.api_url.trim_end_matches('/'));
         let resp = self
             .client
-            .post("https://api.anthropic.com/v1/messages")
+            .post(&url)
             .header("x-api-key", &self.api_key)
             .header("anthropic-version", "2023-06-01")
             .header("content-type", "application/json")
diff --git a/src/config.rs b/src/config.rs
index d14c854..b314bdb 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -17,6 +17,10 @@ pub struct Cli {
     #[arg(long)]
     pub anthropic_key: String,
 
+    /// Anthropic API base URL.
+    #[arg(long, default_value = "https://api.anthropic.com")]
+    pub anthropic_url: String,
+
     /// Claude model to use for strategy generation.
     #[arg(long, default_value = "claude-sonnet-4-20250514")]
     pub model: String,
diff --git a/src/main.rs b/src/main.rs
index 065c1f3..fed38e4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -20,6 +20,7 @@ async fn main() -> anyhow::Result<()> {
 
     tracing::info!("scout starting");
     tracing::info!("  swym API:    {}", cli.swym_url);
+    tracing::info!("  claude API:  {}", cli.anthropic_url);
     tracing::info!("  model:       {}", cli.model);
     tracing::info!("  iterations:  {}", cli.max_iterations);
     tracing::info!("  instruments: {:?}", cli.instruments);