diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 553510d2b..3703d295c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -95,7 +95,7 @@ jobs:
         run: |
           cargo build --locked --profile test --bins
           cargo build --manifest-path ./sequencer-sqlite/Cargo.toml --target-dir ./target
-        timeout-minutes: 30
+        timeout-minutes: 45
 
       - name: Upload archive to workflow
         uses: actions/upload-artifact@v4
diff --git a/Cargo.lock b/Cargo.lock
index 315c0f751..342ee106e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4212,7 +4212,7 @@ dependencies = [
 [[package]]
 name = "hotshot-query-service"
 version = "0.1.75"
-source = "git+https://github.com/EspressoSystems/hotshot-query-service?tag=v0.1.75#dffefa160f441a663723a67bc54efedb11a88b02"
+source = "git+https://github.com/EspressoSystems/hotshot-query-service?tag=v0.1.75-explorer-fixes#d36941606c1a7a9a488963f05e96515fa9cbc1c7"
 dependencies = [
  "anyhow",
  "ark-serialize",
@@ -4237,6 +4237,7 @@ dependencies = [
  "itertools 0.12.1",
  "jf-merkle-tree",
  "jf-vid",
+ "lazy_static",
  "log",
  "portpicker",
  "prometheus",
diff --git a/Cargo.toml b/Cargo.toml
index 630d32d08..b648a093d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -72,7 +72,7 @@ marketplace-builder-core = { git = "https://github.com/EspressoSystems/marketpla
 marketplace-builder-shared = { git = "https://github.com/EspressoSystems/marketplace-builder-core", tag = "0.1.57" }
 hotshot-events-service = { git = "https://github.com/EspressoSystems/hotshot-events-service.git", tag = "0.1.56" }
 hotshot-orchestrator = { git = "https://github.com/EspressoSystems/hotshot", tag = "0.5.82" }
-hotshot-query-service = { git = "https://github.com/EspressoSystems/hotshot-query-service", tag = "v0.1.75" }
+hotshot-query-service = { git = "https://github.com/EspressoSystems/hotshot-query-service", tag = "v0.1.75-explorer-fixes" }
 hotshot-stake-table = { git = "https://github.com/EspressoSystems/hotshot", tag = "0.5.82" }
 hotshot-state-prover = { version = "0.1.0", path = "hotshot-state-prover" }
 hotshot-task = { git = "https://github.com/EspressoSystems/hotshot", tag = "0.5.82" }
diff --git a/justfile b/justfile
index 000051aa1..0287f563e 100644
--- a/justfile
+++ b/justfile
@@ -70,7 +70,10 @@ test-all:
 
 test-integration:
 	@echo 'NOTE that demo-native must be running for this test to succeed.'
-	cargo nextest run --all-features --nocapture --profile integration
+	INTEGRATION_TEST_SEQUENCER_VERSION=2 cargo nextest run --all-features --nocapture --profile integration smoke
+test-integration-mp:
+    @echo 'NOTE that demo-native-mp must be running for this test to succeed.'
+    INTEGRATION_TEST_SEQUENCER_VERSION=99 cargo nextest run --all-features --nocapture --profile integration
 
 clippy:
     @echo 'features: "embedded-db"'
diff --git a/sequencer-sqlite/Cargo.lock b/sequencer-sqlite/Cargo.lock
index 663dd21b5..95cf3cc22 100644
--- a/sequencer-sqlite/Cargo.lock
+++ b/sequencer-sqlite/Cargo.lock
@@ -4090,7 +4090,7 @@ dependencies = [
 [[package]]
 name = "hotshot-query-service"
 version = "0.1.75"
-source = "git+https://github.com/EspressoSystems/hotshot-query-service?tag=v0.1.75#dffefa160f441a663723a67bc54efedb11a88b02"
+source = "git+https://github.com/EspressoSystems/hotshot-query-service?tag=v0.1.75-explorer-fixes#d36941606c1a7a9a488963f05e96515fa9cbc1c7"
 dependencies = [
  "anyhow",
  "ark-serialize",
@@ -4113,6 +4113,7 @@ dependencies = [
  "itertools 0.12.1",
  "jf-merkle-tree",
  "jf-vid",
+ "lazy_static",
  "log",
  "prometheus",
  "refinery",
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index 52afd6496..22b206cfb 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -1,11 +1,12 @@
 use anyhow::{anyhow, Result};
 use client::SequencerClient;
-use espresso_types::FeeAmount;
+use espresso_types::{FeeAmount, FeeVersion, MarketplaceVersion};
 use ethers::prelude::*;
 use futures::future::join_all;
 use std::{fmt, str::FromStr, time::Duration};
 use surf_disco::Url;
 use tokio::time::{sleep, timeout};
+use vbs::version::StaticVersionType;
 
 const L1_PROVIDER_RETRY_INTERVAL: Duration = Duration::from_secs(1);
 // TODO add to .env
@@ -81,10 +82,10 @@ impl TestConfig {
         // which is the initial mainnet version without any upgrades.
         let sequencer_version: u8 = dotenvy::var("INTEGRATION_TEST_SEQUENCER_VERSION")
             .map(|v| v.parse().unwrap())
-            .unwrap_or(2);
+            .unwrap_or(FeeVersion::version().minor as u8);
 
         // Varies between v0 and v3.
-        let load_generator_url = if sequencer_version >= 3 {
+        let load_generator_url = if sequencer_version >= MarketplaceVersion::version().minor as u8 {
             url_from_port(dotenvy::var(
                 "ESPRESSO_SUBMIT_TRANSACTIONS_PRIVATE_RESERVE_PORT",
             )?)?
@@ -93,17 +94,18 @@ impl TestConfig {
         };
 
         // TODO test both builders (probably requires some refactoring).
-        let builder_url = if sequencer_version >= 3 {
+        let builder_url = if sequencer_version as u16 >= MarketplaceVersion::version().minor {
             let url = url_from_port(dotenvy::var("ESPRESSO_RESERVE_BUILDER_SERVER_PORT")?)?;
+            let url = Url::from_str(&url)?;
+            wait_for_service(url.clone(), 1000, 200).await.unwrap();
 
-            Url::from_str(&url)?
-                .join("bundle_info/builderaddress")
-                .unwrap()
+            url.join("bundle_info/builderaddress").unwrap()
         } else {
             let url = url_from_port(dotenvy::var("ESPRESSO_BUILDER_SERVER_PORT")?)?;
-            Url::from_str(&url)?
-                .join("block_info/builderaddress")
-                .unwrap()
+            let url = Url::from_str(&url)?;
+            wait_for_service(url.clone(), 1000, 200).await.unwrap();
+
+            url.join("block_info/builderaddress").unwrap()
         };
 
         let builder_address = get_builder_address(builder_url).await;
@@ -222,9 +224,8 @@ impl TestConfig {
     }
 }
 
-/// Get Address from builder after waiting for builder to become ready.
+/// Get Address from builder
 pub async fn get_builder_address(url: Url) -> Address {
-    let _ = wait_for_service(url.clone(), 1000, 200).await;
     for _ in 0..5 {
         // Try to get builder address somehow
         if let Ok(body) = reqwest::get(url.clone()).await {
@@ -236,20 +237,41 @@ pub async fn get_builder_address(url: Url) -> Address {
     panic!("Error: Failed to retrieve address from builder!");
 }
 
+/// [wait_for_service] will check to see if a service, identified by the given
+/// Url, is available, by checking it's health check endpoint.  If the health
+/// check does not any time before the timeout, then the service will return
+/// an [Err] with the relevant error.
+///
+/// > Note: This function only waits for a single health check pass before
+/// > returning an [Ok] result.
 async fn wait_for_service(url: Url, interval: u64, timeout_duration: u64) -> Result<String> {
+    // utilize the correct path for the health check
+    let Ok(url) = url.join("/healthcheck") else {
+        return Err(anyhow!("Wait for service, could not join url: {}", url));
+    };
+
     timeout(Duration::from_secs(timeout_duration), async {
         loop {
-            if let Ok(body) = reqwest::get(format!("{url}/healthcheck")).await {
-                return body.text().await.map_err(|e| {
-                    anyhow!(
-                        "Wait for service, could not decode response: ({}) {}",
-                        url,
-                        e
-                    )
-                });
-            } else {
+            // Ensure that we get a response from the server
+            let Ok(response) = reqwest::get(url.clone()).await else {
                 sleep(Duration::from_millis(interval)).await;
+                continue;
+            };
+
+            // Check the status code of the response
+            if !response.status().is_success() {
+                // The server did not return a success
+                sleep(Duration::from_millis(interval)).await;
+                continue;
             }
+
+            return response.text().await.map_err(|e| {
+                anyhow!(
+                    "Wait for service, could not decode response: ({}) {}",
+                    url,
+                    e
+                )
+            });
         }
     })
     .await
diff --git a/tests/upgrades.rs b/tests/upgrades.rs
index 5d6893844..e680d904b 100644
--- a/tests/upgrades.rs
+++ b/tests/upgrades.rs
@@ -12,7 +12,7 @@ async fn test_upgrade() -> Result<()> {
 
     let testing = TestConfig::new().await.unwrap();
 
-    let versions = if testing.sequencer_version >= 3 {
+    let versions = if testing.sequencer_version as u16 >= MarketplaceVersion::version().minor {
         (FeeVersion::version(), MarketplaceVersion::version())
     } else {
         panic!("Invalid sequencer version provided for upgrade test.");
diff --git a/types/src/v0/impls/transaction.rs b/types/src/v0/impls/transaction.rs
index 663c0365c..cd473d039 100644
--- a/types/src/v0/impls/transaction.rs
+++ b/types/src/v0/impls/transaction.rs
@@ -119,4 +119,8 @@ impl ExplorerTransaction for Transaction {
     fn namespace_id(&self) -> Self::NamespaceId {
         self.namespace
     }
+
+    fn payload_size(&self) -> u64 {
+        self.payload.len() as u64
+    }
 }