diff --git a/web3_proxy/Cargo.toml b/web3_proxy/Cargo.toml
index 46fef651..03f15b35 100644
--- a/web3_proxy/Cargo.toml
+++ b/web3_proxy/Cargo.toml
@@ -56,7 +56,7 @@ pagerduty-rs = { version = "0.1.6", default-features = false, features = ["async
 parking_lot = { version = "0.12.1", features = ["arc_lock"] }
 prettytable = "*"
 proctitle = "0.1.1"
-rdkafka = { version = "0.29.0", optional = true }
+rdkafka = { version = "0.29.0" }
 regex = "1.7.1"
 reqwest = { version = "0.11.14", default-features = false, features = ["json", "tokio-rustls"] }
 rmp-serde = "1.1.1"
diff --git a/web3_proxy/src/app/mod.rs b/web3_proxy/src/app/mod.rs
index 0e08ad32..9e88eff2 100644
--- a/web3_proxy/src/app/mod.rs
+++ b/web3_proxy/src/app/mod.rs
@@ -37,9 +37,7 @@ use migration::sea_orm::{
 use migration::sea_query::table::ColumnDef;
 use migration::{Alias, DbErr, Migrator, MigratorTrait, Table};
 use moka::future::Cache;
-#[cfg(rdkafka)]
 use rdkafka::message::{Header, OwnedHeaders};
-#[cfg(rdkafka)]
 use rdkafka::producer::FutureRecord;
 use redis_rate_limiter::redis::AsyncCommands;
 use redis_rate_limiter::{redis, DeadpoolRuntime, RedisConfig, RedisPool, RedisRateLimiter};
@@ -230,11 +228,7 @@ pub struct Web3ProxyApp {
     pub bearer_token_semaphores:
         Cache<UserBearerToken, Arc<Semaphore>, hashbrown::hash_map::DefaultHashBuilder>,
     pub stat_sender: Option<flume::Sender<Web3ProxyStat>>,
-
-    #[cfg(rdkafka)]
     pub kafka_producer: Option<rdkafka::producer::FutureProducer>,
-    #[cfg(not(rdkafka))]
-    pub kafka_producer: Option<()>,
 }
 
 /// flatten a JoinError into an anyhow error
@@ -469,12 +463,7 @@ impl Web3ProxyApp {
 
         // connect to kafka for logging requests from the /debug/ urls
 
-        #[cfg(rdkafka)]
         let mut kafka_producer: Option<rdkafka::producer::FutureProducer> = None;
-        #[cfg(not(rdkafka))]
-        let kafka_producer: Option<()> = None;
-
-        #[cfg(rdkafka)]
         if let Some(kafka_brokers) = top_config.app.kafka_urls.clone() {
             match rdkafka::ClientConfig::new()
                 .set("bootstrap.servers", kafka_brokers)
@@ -1095,10 +1084,7 @@ impl Web3ProxyApp {
 
         let request_metadata = Arc::new(RequestMetadata::new(REQUEST_PERIOD, request.num_bytes())?);
 
-        #[cfg(rdkafka)]
         let mut kafka_stuff = None;
-
-        #[cfg(rdkafka)]
         if let Some(kafka_producer) = self.kafka_producer.clone() {
             let request_bytes = rmp_serde::to_vec(&request)?;
 
@@ -1114,8 +1100,10 @@ impl Web3ProxyApp {
 
             let request_hash = Some(keccak256(&request_bytes));
 
-            // the third item is added with the response
-            let kafka_headers = OwnedHeaders::new_with_capacity(3)
+            let chain_id = self.config.chain_id;
+
+            // another item is added with the response
+            let kafka_headers = OwnedHeaders::new_with_capacity(4)
                 .insert(Header {
                     key: "request_hash",
                     value: request_hash.as_ref(),
@@ -1123,6 +1111,10 @@ impl Web3ProxyApp {
                 .insert(Header {
                     key: "head_block_num",
                     value: head_block_num.map(|x| x.to_string()).as_ref(),
+                })
+                .insert(Header {
+                    key: "chain_id",
+                    value: Some(&chain_id.to_le_bytes()),
                 });
 
             // save the key and headers for when we log the response
@@ -1752,7 +1744,6 @@ impl Web3ProxyApp {
                 .context("stat_sender sending response stat")?;
         }
 
-        #[cfg(rdkafka)]
         if let Some((kafka_key, kafka_headers)) = kafka_stuff {
             let kafka_producer = self
                 .kafka_producer
diff --git a/web3_proxy/src/bin/web3_proxy_cli/main.rs b/web3_proxy/src/bin/web3_proxy_cli/main.rs
index 31ed40fb..9a40e763 100644
--- a/web3_proxy/src/bin/web3_proxy_cli/main.rs
+++ b/web3_proxy/src/bin/web3_proxy_cli/main.rs
@@ -376,7 +376,7 @@ fn main() -> anyhow::Result<()> {
                 x.main(pagerduty_async, top_config).await
             }
             SubCommand::PopularityContest(x) => x.main().await,
-            SubCommand::SearchKafka(x) => x.main().await,
+            SubCommand::SearchKafka(x) => x.main(top_config.unwrap()).await,
             SubCommand::Sentryd(x) => {
                 if cli_config.sentry_url.is_none() {
                     warn!("sentry_url is not set! Logs will only show in this console");