diff --git a/proxy/src/auth/backend/jwt.rs b/proxy/src/auth/backend/jwt.rs
index b62a11ccb2..fce503a190 100644
--- a/proxy/src/auth/backend/jwt.rs
+++ b/proxy/src/auth/backend/jwt.rs
@@ -147,14 +147,14 @@ impl JwkCacheEntryLock {
                 Err(e) => tracing::warn!(url=?rule.jwks_url, error=?e, "could not fetch JWKs"),
                 Ok(r) => {
                     let resp: http::Response<reqwest::Body> = r.into();
-                    match parse_json_body_with_limit::<jose_jwk::JwkSet>(
+                    match parse_json_body_with_limit::<jose_jwk::JwkSet, _>(
                         resp.into_body(),
                         MAX_JWK_BODY_SIZE,
                     )
                     .await
                     {
                         Err(e) => {
-                            tracing::warn!(url=?rule.jwks_url, error=?e, "could not decode JWKs");
+                            tracing::warn!(url=?rule.jwks_url, error=%e, "could not decode JWKs");
                         }
                         Ok(jwks) => {
                             key_sets.insert(
diff --git a/proxy/src/http.rs b/proxy/src/http.rs
index 14720b5c6b..0a38c70ad6 100644
--- a/proxy/src/http.rs
+++ b/proxy/src/http.rs
@@ -6,7 +6,6 @@ pub mod health_server;
 
 use std::time::Duration;
 
-use anyhow::bail;
 use bytes::Bytes;
 use http_body_util::BodyExt;
 use hyper1::body::Body;
@@ -113,10 +112,20 @@ impl Endpoint {
     }
 }
 
-pub(crate) async fn parse_json_body_with_limit<D: DeserializeOwned>(
-    mut b: impl Body<Data = Bytes, Error = reqwest::Error> + Unpin,
+#[derive(Debug, thiserror::Error)]
+pub(crate) enum ReadPayloadError<E> {
+    #[error("could not read the HTTP body: {0}")]
+    Read(E),
+    #[error("could not parse the HTTP body: {0}")]
+    Parse(#[from] serde_json::Error),
+    #[error("could not parse the HTTP body: content length exceeds limit of {0} bytes")]
+    LengthExceeded(usize),
+}
+
+pub(crate) async fn parse_json_body_with_limit<D: DeserializeOwned, E>(
+    mut b: impl Body<Data = Bytes, Error = E> + Unpin,
     limit: usize,
-) -> anyhow::Result<D> {
+) -> Result<D, ReadPayloadError<E>> {
     // We could use `b.limited().collect().await.to_bytes()` here
     // but this ends up being slightly more efficient as far as I can tell.
 
@@ -124,14 +133,19 @@ pub(crate) async fn parse_json_body_with_limit<D: DeserializeOwned>(
     // in reqwest, this value is influenced by the Content-Length header.
     let lower_bound = match usize::try_from(b.size_hint().lower()) {
         Ok(bound) if bound <= limit => bound,
-        _ => bail!("Content length exceeds limit of {limit} bytes"),
+        _ => return Err(ReadPayloadError::LengthExceeded(limit)),
     };
     let mut bytes = Vec::with_capacity(lower_bound);
 
-    while let Some(frame) = b.frame().await.transpose()? {
+    while let Some(frame) = b
+        .frame()
+        .await
+        .transpose()
+        .map_err(ReadPayloadError::Read)?
+    {
         if let Ok(data) = frame.into_data() {
             if bytes.len() + data.len() > limit {
-                bail!("Content length exceeds limit of {limit} bytes")
+                return Err(ReadPayloadError::LengthExceeded(limit));
             }
             bytes.extend_from_slice(&data);
         }
diff --git a/proxy/src/serverless/sql_over_http.rs b/proxy/src/serverless/sql_over_http.rs
index 15f4ee5639..dd017a0da8 100644
--- a/proxy/src/serverless/sql_over_http.rs
+++ b/proxy/src/serverless/sql_over_http.rs
@@ -50,6 +50,7 @@ use crate::context::RequestMonitoring;
 use crate::error::ErrorKind;
 use crate::error::ReportableError;
 use crate::error::UserFacingError;
+use crate::http::parse_json_body_with_limit;
 use crate::metrics::HttpDirection;
 use crate::metrics::Metrics;
 use crate::proxy::run_until_cancelled;
@@ -363,7 +364,7 @@ pub(crate) async fn handle(
 #[derive(Debug, thiserror::Error)]
 pub(crate) enum SqlOverHttpError {
     #[error("{0}")]
-    ReadPayload(#[from] ReadPayloadError),
+    ReadPayload(ReadPayloadError),
     #[error("{0}")]
     ConnectCompute(#[from] HttpConnError),
     #[error("{0}")]
@@ -417,9 +418,9 @@ impl UserFacingError for SqlOverHttpError {
 #[derive(Debug, thiserror::Error)]
 pub(crate) enum ReadPayloadError {
     #[error("could not read the HTTP request body: {0}")]
-    Read(#[from] hyper1::Error),
+    Read(hyper1::Error),
     #[error("could not parse the HTTP request body: {0}")]
-    Parse(#[from] serde_json::Error),
+    Parse(serde_json::Error),
 }
 
 impl ReportableError for ReadPayloadError {
@@ -431,6 +432,18 @@ impl ReportableError for ReadPayloadError {
     }
 }
 
+impl From<crate::http::ReadPayloadError<hyper1::Error>> for SqlOverHttpError {
+    fn from(value: crate::http::ReadPayloadError<hyper1::Error>) -> Self {
+        match value {
+            crate::http::ReadPayloadError::Read(e) => Self::ReadPayload(ReadPayloadError::Read(e)),
+            crate::http::ReadPayloadError::Parse(e) => {
+                Self::ReadPayload(ReadPayloadError::Parse(e))
+            }
+            crate::http::ReadPayloadError::LengthExceeded(x) => Self::RequestTooLarge(x as u64),
+        }
+    }
+}
+
 #[derive(Debug, thiserror::Error)]
 pub(crate) enum SqlOverHttpCancel {
     #[error("query was cancelled")]
@@ -590,15 +603,14 @@ async fn handle_db_inner(
         ));
     }
 
-    let fetch_and_process_request = Box::pin(
-        async {
-            let body = request.into_body().collect().await?.to_bytes();
-            info!(length = body.len(), "request payload read");
-            let payload: Payload = serde_json::from_slice(&body)?;
-            Ok::<Payload, ReadPayloadError>(payload) // Adjust error type accordingly
-        }
-        .map_err(SqlOverHttpError::from),
-    );
+    let fetch_and_process_request = Box::pin(async {
+        let payload = parse_json_body_with_limit(
+            request.into_body(),
+            config.http_config.max_request_size_bytes as usize,
+        )
+        .await?;
+        Ok::<Payload, SqlOverHttpError>(payload) // Adjust error type accordingly
+    });
 
     let authenticate_and_connect = Box::pin(
         async {