diff --git a/mev-rs/src/blinded_block_relayer/api/client.rs b/mev-rs/src/blinded_block_relayer/api/client.rs
index e868c1e9..64e76b8d 100644
--- a/mev-rs/src/blinded_block_relayer/api/client.rs
+++ b/mev-rs/src/blinded_block_relayer/api/client.rs
@@ -27,6 +27,7 @@ impl BlindedBlockRelayer for Client {
     async fn submit_bid(
         &self,
         signed_submission: &SignedBidSubmission,
+        with_cancellations: bool,
     ) -> Result<SignedBidReceipt, Error> {
         let response = self.api.http_post("/relay/v1/builder/blocks", signed_submission).await?;
         let receipt: ApiResult<SignedBidReceipt> = response.json().await.map_err(ApiError::from)?;
diff --git a/mev-rs/src/blinded_block_relayer/api/server.rs b/mev-rs/src/blinded_block_relayer/api/server.rs
index a0153cab..f90c101f 100644
--- a/mev-rs/src/blinded_block_relayer/api/server.rs
+++ b/mev-rs/src/blinded_block_relayer/api/server.rs
@@ -4,7 +4,7 @@ use crate::{
     types::{ProposerSchedule, SignedBidReceipt, SignedBidSubmission},
 };
 use axum::{
-    extract::{Json, State},
+    extract::{Json, Query, State},
     routing::{get, post, IntoMakeService},
     Router,
 };
@@ -24,10 +24,11 @@ async fn handle_get_proposal_schedule<R: BlindedBlockRelayer>(
 
 async fn handle_submit_bid<R: BlindedBlockRelayer>(
     State(relayer): State<R>,
+    Query(with_cancellations): Query<bool>,
     Json(signed_bid_submission): Json<SignedBidSubmission>,
 ) -> Result<Json<SignedBidReceipt>, Error> {
     tracing::info!("handling bid submission");
-    Ok(Json(relayer.submit_bid(&signed_bid_submission).await?))
+    Ok(Json(relayer.submit_bid(&signed_bid_submission, with_cancellations).await?))
 }
 
 pub struct Server<R: BlindedBlockRelayer> {
diff --git a/mev-rs/src/blinded_block_relayer/mod.rs b/mev-rs/src/blinded_block_relayer/mod.rs
index e85271b1..e5d1db46 100644
--- a/mev-rs/src/blinded_block_relayer/mod.rs
+++ b/mev-rs/src/blinded_block_relayer/mod.rs
@@ -18,5 +18,6 @@ pub trait BlindedBlockRelayer {
     async fn submit_bid(
         &self,
         signed_submission: &SignedBidSubmission,
+        with_cancellations: bool,
     ) -> Result<SignedBidReceipt, Error>;
 }