diff --git a/web3_proxy/src/app/ws.rs b/web3_proxy/src/app/ws.rs
index 78d44f49..5b7d112d 100644
--- a/web3_proxy/src/app/ws.rs
+++ b/web3_proxy/src/app/ws.rs
@@ -335,7 +335,9 @@ impl Web3ProxyApp {
                 );
             });
         } else {
-            return Err(Web3ProxyError::NotImplemented);
+            return Err(Web3ProxyError::NotImplemented(
+                subscribe_to.to_owned().into(),
+            ));
         }
 
         // TODO: do something with subscription_join_handle?
diff --git a/web3_proxy/src/block_number.rs b/web3_proxy/src/block_number.rs
index 5905d5f5..bebedc36 100644
--- a/web3_proxy/src/block_number.rs
+++ b/web3_proxy/src/block_number.rs
@@ -11,7 +11,7 @@ use ethers::{
 };
 use serde_json::json;
 use std::sync::Arc;
-use tracing::{trace, warn};
+use tracing::{trace, warn, error};
 
 use crate::{frontend::authorization::Authorization, rpcs::many::Web3Rpcs};
 
diff --git a/web3_proxy/src/errors.rs b/web3_proxy/src/errors.rs
index 2365f052..066da18a 100644
--- a/web3_proxy/src/errors.rs
+++ b/web3_proxy/src/errors.rs
@@ -116,7 +116,8 @@ pub enum Web3ProxyError {
         needed: u32,
     },
     NotFound,
-    NotImplemented,
+    #[error(ignore)]
+    NotImplemented(Cow<'static, str>),
     NoVolatileRedisDatabase,
     OriginRequired,
     #[error(ignore)]
@@ -723,12 +724,16 @@ impl Web3ProxyError {
                     },
                 )
             }
-            Self::NotImplemented => {
-                error!("NotImplemented");
+            Self::NotImplemented(msg) => {
+                warn!("NotImplemented: {}", msg);
                 (
                     StatusCode::NOT_IMPLEMENTED,
                     JsonRpcErrorData {
-                        message: "work in progress".into(),
+                        message: format!(
+                            "{} is not yet implemented. contact us if you need this",
+                            msg
+                        )
+                        .into(),
                         code: StatusCode::NOT_IMPLEMENTED.as_u16().into(),
                         data: None,
                     },
diff --git a/web3_proxy/src/frontend/users/rpc_keys.rs b/web3_proxy/src/frontend/users/rpc_keys.rs
index 0ec84c70..85800bb2 100644
--- a/web3_proxy/src/frontend/users/rpc_keys.rs
+++ b/web3_proxy/src/frontend/users/rpc_keys.rs
@@ -128,7 +128,7 @@ pub async fn rpc_keys_delete(
     let (_user, _semaphore) = app.bearer_is_authorized(bearer).await?;
 
     // TODO: think about how cascading deletes and billing should work
-    Err(Web3ProxyError::NotImplemented)
+    Err(Web3ProxyError::NotImplemented("rpc_keys_delete".into()))
 }
 
 /// the JSON input to the `rpc_keys_management` handler.