diff --git a/.changelog/19031.txt b/.changelog/19031.txt
new file mode 100644
index 0000000000..a00e116c74
--- /dev/null
+++ b/.changelog/19031.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+api: add custom marshal/unmarshal for ServiceResolverConfigEntry.RequestTimeout so config entries that set this field can be read using the API.
+```
diff --git a/agent/structs/config_entry_discoverychain.go b/agent/structs/config_entry_discoverychain.go
index 6dc0a05d82..ed81726830 100644
--- a/agent/structs/config_entry_discoverychain.go
+++ b/agent/structs/config_entry_discoverychain.go
@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"github.com/hashicorp/go-bexpr"
+	"github.com/hashicorp/go-multierror"
 	"github.com/mitchellh/copystructure"
 	"github.com/mitchellh/hashstructure"
 
@@ -929,21 +930,22 @@ func (e *ServiceResolverConfigEntry) UnmarshalJSON(data []byte) error {
 	}{
 		Alias: (*Alias)(e),
 	}
-	if err := lib.UnmarshalJSON(data, &aux); err != nil {
+	var err error
+	if err = lib.UnmarshalJSON(data, &aux); err != nil {
 		return err
 	}
-	var err error
+	var merr *multierror.Error
 	if aux.ConnectTimeout != "" {
 		if e.ConnectTimeout, err = time.ParseDuration(aux.ConnectTimeout); err != nil {
-			return err
+			merr = multierror.Append(merr, err)
 		}
 	}
 	if aux.RequestTimeout != "" {
 		if e.RequestTimeout, err = time.ParseDuration(aux.RequestTimeout); err != nil {
-			return err
+			merr = multierror.Append(merr, err)
 		}
 	}
-	return nil
+	return merr.ErrorOrNil()
 }
 
 func (e *ServiceResolverConfigEntry) SubsetExists(name string) bool {
diff --git a/agent/structs/config_entry_discoverychain_test.go b/agent/structs/config_entry_discoverychain_test.go
index 5961446d1f..b2547a7ace 100644
--- a/agent/structs/config_entry_discoverychain_test.go
+++ b/agent/structs/config_entry_discoverychain_test.go
@@ -1571,6 +1571,15 @@ func TestServiceResolverConfigEntry(t *testing.T) {
 			},
 			validateErr: "Bad ConnectTimeout",
 		},
+		{
+			name: "bad request timeout",
+			entry: &ServiceResolverConfigEntry{
+				Kind:           ServiceResolver,
+				Name:           "test",
+				RequestTimeout: -1 * time.Second,
+			},
+			validateErr: "Bad RequestTimeout",
+		},
 	}
 
 	// Bulk add a bunch of similar validation cases.
diff --git a/api/config_entry_discoverychain.go b/api/config_entry_discoverychain.go
index 3696f7be55..eeb3a1074c 100644
--- a/api/config_entry_discoverychain.go
+++ b/api/config_entry_discoverychain.go
@@ -6,6 +6,8 @@ package api
 import (
 	"encoding/json"
 	"time"
+
+	"github.com/hashicorp/go-multierror"
 )
 
 type ServiceRouterConfigEntry struct {
@@ -189,14 +191,19 @@ func (e *ServiceResolverConfigEntry) MarshalJSON() ([]byte, error) {
 	type Alias ServiceResolverConfigEntry
 	exported := &struct {
 		ConnectTimeout string `json:",omitempty"`
+		RequestTimeout string `json:",omitempty"`
 		*Alias
 	}{
 		ConnectTimeout: e.ConnectTimeout.String(),
+		RequestTimeout: e.RequestTimeout.String(),
 		Alias:          (*Alias)(e),
 	}
 	if e.ConnectTimeout == 0 {
 		exported.ConnectTimeout = ""
 	}
+	if e.RequestTimeout == 0 {
+		exported.RequestTimeout = ""
+	}
 
 	return json.Marshal(exported)
 }
@@ -205,20 +212,27 @@ func (e *ServiceResolverConfigEntry) UnmarshalJSON(data []byte) error {
 	type Alias ServiceResolverConfigEntry
 	aux := &struct {
 		ConnectTimeout string
+		RequestTimeout string
 		*Alias
 	}{
 		Alias: (*Alias)(e),
 	}
-	if err := json.Unmarshal(data, &aux); err != nil {
+	var err error
+	if err = json.Unmarshal(data, &aux); err != nil {
 		return err
 	}
-	var err error
+	var merr *multierror.Error
 	if aux.ConnectTimeout != "" {
 		if e.ConnectTimeout, err = time.ParseDuration(aux.ConnectTimeout); err != nil {
-			return err
+			merr = multierror.Append(merr, err)
 		}
 	}
-	return nil
+	if aux.RequestTimeout != "" {
+		if e.RequestTimeout, err = time.ParseDuration(aux.RequestTimeout); err != nil {
+			merr = multierror.Append(merr, err)
+		}
+	}
+	return merr.ErrorOrNil()
 }
 
 func (e *ServiceResolverConfigEntry) GetKind() string            { return e.Kind }
diff --git a/api/config_entry_discoverychain_test.go b/api/config_entry_discoverychain_test.go
index e1f35e1bc3..6b4a63e97e 100644
--- a/api/config_entry_discoverychain_test.go
+++ b/api/config_entry_discoverychain_test.go
@@ -173,6 +173,7 @@ func TestAPI_ConfigEntry_DiscoveryChain(t *testing.T) {
 					},
 				},
 				ConnectTimeout: 5 * time.Second,
+				RequestTimeout: 10 * time.Second,
 				Meta: map[string]string{
 					"foo": "bar",
 					"gir": "zim",