diff --git a/services/blob/src/config.rs b/services/blob/src/config.rs
--- a/services/blob/src/config.rs
+++ b/services/blob/src/config.rs
@@ -4,15 +4,15 @@
 use tracing::info;
 
 use crate::constants::{
-  AWS_REGION, GRPC_SERVER_DEFAULT_PORT, LOCALSTACK_URL, SANDBOX_ENV_VAR,
+  AWS_REGION, DEFAULT_LISTEN_PORT, LOCALSTACK_URL, SANDBOX_ENV_VAR,
 };
 
 #[derive(Parser)]
 #[command(version, about, long_about = None)]
 pub struct AppConfig {
-  /// gRPC server listening port
-  #[arg(long = "port", default_value_t = GRPC_SERVER_DEFAULT_PORT)]
-  pub grpc_port: u64,
+  /// HTTP/gRPC server listening port
+  #[arg(long = "port", default_value_t = DEFAULT_LISTEN_PORT)]
+  pub listen_port: u16,
   /// Run the service in sandbox
   #[arg(long = "sandbox", default_value_t = false)]
   // support the env var for compatibility reasons
diff --git a/services/blob/src/constants.rs b/services/blob/src/constants.rs
--- a/services/blob/src/constants.rs
+++ b/services/blob/src/constants.rs
@@ -1,6 +1,6 @@
 // Assorted constants
 
-pub const GRPC_SERVER_DEFAULT_PORT: u64 = 50051;
+pub const DEFAULT_LISTEN_PORT: u16 = 50051;
 pub const AWS_REGION: &str = "us-east-2";
 pub const LOCALSTACK_URL: &str = "http://localstack:4566";
 pub const MPSC_CHANNEL_BUFFER_CAPACITY: usize = 1;
diff --git a/services/blob/src/grpc.rs b/services/blob/src/grpc.rs
--- a/services/blob/src/grpc.rs
+++ b/services/blob/src/grpc.rs
@@ -28,10 +28,10 @@
   db_client: DatabaseClient,
   s3_client: S3Client,
 ) -> Result<()> {
-  let addr: SocketAddr = format!("[::]:{}", CONFIG.grpc_port).parse()?;
+  let addr: SocketAddr = format!("[::]:{}", CONFIG.listen_port).parse()?;
   let blob_service = MyBlobService::new(db_client, s3_client);
 
-  info!("Starting gRPC server listening at {}", CONFIG.grpc_port);
+  info!("Starting gRPC server listening at {}", CONFIG.listen_port);
   Server::builder()
     .add_service(BlobServiceServer::new(blob_service))
     .serve(addr)