diff --git a/crates/common/src/retry.rs b/crates/common/src/retry.rs
index 7f649c7ed35a..59ba2055f8a3 100644
--- a/crates/common/src/retry.rs
+++ b/crates/common/src/retry.rs
@@ -83,6 +83,6 @@ impl Retry {
 
     fn handle_err(&mut self, err: Error) {
         self.retries -= 1;
-        warn!("erroneous attempt ({} tries remaining): {}", self.retries, err.root_cause());
+        let _ = sh_warn!("{} ({} tries remaining)", err.root_cause(), self.retries);
     }
 }
diff --git a/crates/verify/src/bytecode.rs b/crates/verify/src/bytecode.rs
index a8fc1ace7066..0c3f9e5b0a91 100644
--- a/crates/verify/src/bytecode.rs
+++ b/crates/verify/src/bytecode.rs
@@ -96,6 +96,11 @@ impl figment::Provider for VerifyBytecodeArgs {
         &self,
     ) -> Result<figment::value::Map<figment::Profile, figment::value::Dict>, figment::Error> {
         let mut dict = self.etherscan.dict();
+
+        if let Some(api_key) = &self.verifier.verifier_api_key {
+            dict.insert("etherscan_api_key".into(), api_key.as_str().into());
+        }
+
         if let Some(block) = &self.block {
             dict.insert("block".into(), figment::value::Value::serialize(block)?);
         }
diff --git a/crates/verify/src/provider.rs b/crates/verify/src/provider.rs
index 6e5b29d5e34c..bc01bd9e304d 100644
--- a/crates/verify/src/provider.rs
+++ b/crates/verify/src/provider.rs
@@ -124,6 +124,7 @@ impl FromStr for VerificationProviderType {
             "s" | "sourcify" => Ok(Self::Sourcify),
             "b" | "blockscout" => Ok(Self::Blockscout),
             "o" | "oklink" => Ok(Self::Oklink),
+            "c" | "custom" => Ok(Self::Custom),
             _ => Err(format!("Unknown provider: {s}")),
         }
     }
@@ -144,6 +145,9 @@ impl fmt::Display for VerificationProviderType {
             Self::Oklink => {
                 write!(f, "oklink")?;
             }
+            Self::Custom => {
+                write!(f, "custom")?;
+            }
         };
         Ok(())
     }
@@ -156,6 +160,8 @@ pub enum VerificationProviderType {
     Sourcify,
     Blockscout,
     Oklink,
+    /// Custom verification provider, requires compatibility with the Etherscan API.
+    Custom,
 }
 
 impl VerificationProviderType {
@@ -171,6 +177,7 @@ impl VerificationProviderType {
             Self::Sourcify => Ok(Box::<SourcifyVerificationProvider>::default()),
             Self::Blockscout => Ok(Box::<EtherscanVerificationProvider>::default()),
             Self::Oklink => Ok(Box::<EtherscanVerificationProvider>::default()),
+            Self::Custom => Ok(Box::<EtherscanVerificationProvider>::default()),
         }
     }
 }
diff --git a/crates/verify/src/verify.rs b/crates/verify/src/verify.rs
index 5f3e55329d88..89cfd99aa676 100644
--- a/crates/verify/src/verify.rs
+++ b/crates/verify/src/verify.rs
@@ -31,14 +31,22 @@ pub struct VerifierArgs {
     #[arg(long, help_heading = "Verifier options", default_value = "etherscan", value_enum)]
     pub verifier: VerificationProviderType,
 
-    /// The verifier URL, if using a custom provider
+    /// The verifier API KEY, if using a custom provider.
+    #[arg(long, help_heading = "Verifier options", env = "VERIFIER_API_KEY")]
+    pub verifier_api_key: Option<String>,
+
+    /// The verifier URL, if using a custom provider.
     #[arg(long, help_heading = "Verifier options", env = "VERIFIER_URL")]
     pub verifier_url: Option<String>,
 }
 
 impl Default for VerifierArgs {
     fn default() -> Self {
-        Self { verifier: VerificationProviderType::Etherscan, verifier_url: None }
+        Self {
+            verifier: VerificationProviderType::Etherscan,
+            verifier_api_key: None,
+            verifier_url: None,
+        }
     }
 }
 
@@ -162,6 +170,11 @@ impl figment::Provider for VerifyArgs {
         if self.via_ir {
             dict.insert("via_ir".to_string(), figment::value::Value::serialize(self.via_ir)?);
         }
+
+        if let Some(api_key) = &self.verifier.verifier_api_key {
+            dict.insert("etherscan_api_key".into(), api_key.as_str().into());
+        }
+
         Ok(figment::value::Map::from([(Config::selected_profile(), dict)]))
     }
 }