feat(rust-sdk): improve API key handling for cloud vs self-hosted services in FirecrawlApp

SELF_HOST.md

@@ -116,6 +116,10 @@ If you’d like to test the crawl endpoint, you can run this:
 
 This section provides solutions to common issues you might encounter while setting up or running your self-hosted instance of Firecrawl.
 
+### API Keys for SDK Usage
+
+**Note:** When using Firecrawl SDKs with a self-hosted instance, API keys are optional. API keys are only required when connecting to the cloud service (api.firecrawl.dev).
+
 ### Supabase client is not configured
 
 **Symptom:**

apps/rust-sdk/src/error.rs

@@ -9,7 +9,7 @@ use crate::crawl::CrawlStatus;
 #[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct FirecrawlAPIError {
     /// Always false.
-    success: bool,
+    pub success: bool,
 
     /// Error message
     pub error: String,

apps/rust-sdk/src/lib.rs

@@ -9,6 +9,7 @@ pub mod map;
 pub mod scrape;
 
 pub use error::FirecrawlError;
+use error::FirecrawlAPIError;
 
 #[derive(Clone, Debug)]
 pub struct FirecrawlApp {
@@ -18,16 +19,30 @@ pub struct FirecrawlApp {
 }
 
 pub(crate) const API_VERSION: &str = "/v1";
+const CLOUD_API_URL: &str = "https://api.firecrawl.dev";
 
 impl FirecrawlApp {
     pub fn new(api_key: impl AsRef<str>) -> Result<Self, FirecrawlError> {
-        FirecrawlApp::new_selfhosted("https://api.firecrawl.dev", Some(api_key))
+        FirecrawlApp::new_selfhosted(CLOUD_API_URL, Some(api_key))
     }
 
     pub fn new_selfhosted(api_url: impl AsRef<str>, api_key: Option<impl AsRef<str>>) -> Result<Self, FirecrawlError> {
+        let url = api_url.as_ref().to_string();
+        
+        if url == CLOUD_API_URL && api_key.is_none() {
+            return Err(FirecrawlError::APIError(
+                "Configuration".to_string(),
+                FirecrawlAPIError {
+                    success: false,
+                    error: "API key is required for cloud service".to_string(),
+                    details: None,
+                }
+            ));
+        }
+
         Ok(FirecrawlApp {
             api_key: api_key.map(|x| x.as_ref().to_string()),
-            api_url: api_url.as_ref().to_string(),
+            api_url: url,
             client: Client::new(),
         })
     }

apps/rust-sdk/tests/e2e_with_auth.rs

@@ -1,7 +1,7 @@
 use assert_matches::assert_matches;
 use dotenvy::dotenv;
 use firecrawl::scrape::{ExtractOptions, ScrapeFormats, ScrapeOptions};
-use firecrawl::FirecrawlApp;
+use firecrawl::{FirecrawlApp, FirecrawlError};
 use serde_json::json;
 use std::env;
 
@@ -154,3 +154,29 @@ async fn test_llm_extraction() {
     assert!(llm_extraction["supports_sso"].is_boolean());
     assert!(llm_extraction["is_open_source"].is_boolean());
 }
+
+#[test]
+fn test_api_key_requirements() {
+    dotenv().ok();
+    
+    let api_url = env::var("API_URL").unwrap_or("http://localhost:3002".to_string());
+    let api_key = env::var("TEST_API_KEY").ok();
+
+    match (api_url.contains("api.firecrawl.dev"), api_key) {
+        (false, _) => {
+            let result = FirecrawlApp::new_selfhosted(&api_url, None::<String>);
+            assert!(result.is_ok(), "Local setup failed: {:?}", result.err().unwrap());
+        }
+        (true, None) => {
+            let result = FirecrawlApp::new_selfhosted(&api_url, None::<String>);
+            assert!(matches!(
+                result,
+                Err(FirecrawlError::APIError(msg, _)) if msg == "Configuration"
+            ));
+        }
+        (true, Some(key)) => {
+            let result = FirecrawlApp::new_selfhosted(&api_url, Some(&key));
+            assert!(result.is_ok());
+        }
+    }
+}