diff --git a/converter/value.go b/converter/value.go
index a8ddc939a..893409845 100644
--- a/converter/value.go
+++ b/converter/value.go
@@ -57,3 +57,22 @@ func (v RawValue) MarshalJSON() ([]byte, error) {
 func (v *RawValue) UnmarshalJSON(b []byte) error {
 	return fmt.Errorf("RawValue is not JSON serializable")
 }
+
+// ValuesPayloads is an optional interface that EncodedValue and EncodedValues may implement
+// to expose the underlying commonpb.Payloads without decoding.
+type ValuesPayloads interface {
+	// Payloads gets the underlying commonpb.Payloads
+	Payloads() *commonpb.Payloads
+}
+
+// GetPayloads acts as a helper to extract the raw *commonpb.Payloads from an EncodedValue
+// or EncodedValues, if the underlying implementation supports it via the ValuesPayloads interface.
+// If the underlying implementation does not support it, this returns nil.
+//
+// Exposed as: [go.temporal.io/sdk/converter.GetPayloads]
+func GetPayloads(encoded interface{}) *commonpb.Payloads {
+	if vp, ok := encoded.(ValuesPayloads); ok {
+		return vp.Payloads()
+	}
+	return nil
+}
diff --git a/internal/error.go b/internal/error.go
index bfabb811d..b052c1151 100644
--- a/internal/error.go
+++ b/internal/error.go
@@ -566,6 +566,10 @@ func (e *temporalError) failure() *failurepb.Failure {
 	return e.originalFailure
 }
 
+func (e *temporalError) Failure() *failurepb.Failure {
+	return e.originalFailure
+}
+
 // IsCanceledError returns whether error in CanceledError.
 func IsCanceledError(err error) bool {
 	var canceledErr *CanceledError
diff --git a/internal/workflow.go b/internal/workflow.go
index e29ece31a..0256e743d 100644
--- a/internal/workflow.go
+++ b/internal/workflow.go
@@ -2132,6 +2132,11 @@ func (b EncodedValue) HasValue() bool {
 	return b.value != nil
 }
 
+// Payloads gets the underlying commonpb.Payloads
+func (b EncodedValue) Payloads() *commonpb.Payloads {
+	return b.value
+}
+
 // SideEffect executes the provided function once, records its result into the workflow history. The recorded result on
 // history will be returned without executing the provided function during replay. This guarantees the deterministic
 // requirement for workflow as the exact same result will be returned in replay.
diff --git a/internal/workflow_testsuite.go b/internal/workflow_testsuite.go
index 3d15a2c59..faeb63da8 100644
--- a/internal/workflow_testsuite.go
+++ b/internal/workflow_testsuite.go
@@ -98,11 +98,16 @@ func (b EncodedValues) Get(valuePtr ...interface{}) error {
 	return b.dataConverter.FromPayloads(b.values, valuePtr...)
 }
 
-// HasValues return whether there are values
+// HasValues return whether there are values encoded.
 func (b EncodedValues) HasValues() bool {
 	return b.values != nil
 }
 
+// Payloads gets the underlying commonpb.Payloads
+func (b EncodedValues) Payloads() *commonpb.Payloads {
+	return b.values
+}
+
 // Get extract data from encoded data to desired value type. valuePtr is pointer to the actual value type.
 func (b ErrorDetailsValues) Get(valuePtr ...interface{}) error {
 	if !b.HasValues() {
@@ -117,11 +122,16 @@ func (b ErrorDetailsValues) Get(valuePtr ...interface{}) error {
 	return nil
 }
 
-// HasValues return whether there are values.
+// HasValues return whether there are values encoded.
 func (b ErrorDetailsValues) HasValues() bool {
 	return len(b) != 0
 }
 
+// Payloads gets the underlying commonpb.Payloads
+func (b ErrorDetailsValues) Payloads() *commonpb.Payloads {
+	return nil
+}
+
 // NewTestWorkflowEnvironment creates a new instance of TestWorkflowEnvironment. Use the returned TestWorkflowEnvironment
 // to run your workflow in the test environment.
 func (s *WorkflowTestSuite) NewTestWorkflowEnvironment() *TestWorkflowEnvironment {
diff --git a/mocks/Value.go b/mocks/Value.go
index 7b3c9dd91..95e9faba7 100644
--- a/mocks/Value.go
+++ b/mocks/Value.go
@@ -4,7 +4,10 @@
 
 package mocks
 
-import "github.com/stretchr/testify/mock"
+import (
+	"github.com/stretchr/testify/mock"
+	commonpb "go.temporal.io/api/common/v1"
+)
 
 // Value is an autogenerated mock type for the Value type
 type Value struct {
@@ -47,6 +50,26 @@ func (_m *Value) HasValue() bool {
 	return r0
 }
 
+// Payloads provides a mock function with given fields:
+func (_m *Value) Payloads() *commonpb.Payloads {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for Payloads")
+	}
+
+	var r0 *commonpb.Payloads
+	if rf, ok := ret.Get(0).(func() *commonpb.Payloads); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*commonpb.Payloads)
+		}
+	}
+
+	return r0
+}
+
 // NewEncodedValue creates a new instance of Value. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
 // The first argument is typically a *testing.T value.
 func NewEncodedValue(t interface {