diff --git a/simulators/eth2/common/spoofing/beacon/beacon_verification.go b/simulators/eth2/common/spoofing/beacon/beacon_verification.go
new file mode 100644
index 0000000000..8a0522dc01
--- /dev/null
+++ b/simulators/eth2/common/spoofing/beacon/beacon_verification.go
@@ -0,0 +1,124 @@
+package beacon
+
+import (
+	"fmt"
+
+	api "github.com/ethereum/go-ethereum/core/beacon"
+	"github.com/ethereum/hive/simulators/eth2/common/spoofing/proxy"
+	spoof "github.com/rauljordan/engine-proxy/proxy"
+	"golang.org/x/exp/slices"
+)
+
+// API call names
+const (
+	EngineForkchoiceUpdatedV1 = "engine_forkchoiceUpdatedV1"
+	EngineForkchoiceUpdatedV2 = "engine_forkchoiceUpdatedV2"
+	EngineNewPayloadV1        = "engine_newPayloadV1"
+	EngineNewPayloadV2        = "engine_newPayloadV2"
+)
+
+var EngineNewPayload = []string{
+	EngineNewPayloadV1,
+	EngineNewPayloadV2,
+}
+
+var EngineForkchoiceUpdated = []string{
+	EngineForkchoiceUpdatedV1,
+	EngineForkchoiceUpdatedV2,
+}
+
+type FallibleLogger interface {
+	Fail()
+	Logf(format string, values ...interface{})
+}
+
+func GetTimestampFromNewPayload(
+	req []byte,
+) (*uint64, error) {
+	var payload api.ExecutableData
+	if err := proxy.UnmarshalFromJsonRPCRequest(req, &payload); err != nil {
+		return nil, err
+	}
+	return &payload.Timestamp, nil
+}
+
+func GetTimestampFromFcU(
+	req []byte,
+) (*uint64, error) {
+	var (
+		fcS api.ForkchoiceStateV1
+		pA  *api.PayloadAttributes
+	)
+	if err := proxy.UnmarshalFromJsonRPCRequest(req, &fcS, &pA); err != nil {
+		return nil, err
+	}
+	if pA == nil {
+		return nil, nil
+	}
+	return &pA.Timestamp, nil
+}
+
+type EngineEndpointMaxTimestampVerify struct {
+	Endpoint          string
+	ExpiringTimestamp uint64
+	GetTimestampFn    func([]byte) (*uint64, error)
+	FallibleLogger    FallibleLogger
+}
+
+func (v *EngineEndpointMaxTimestampVerify) Verify(
+	req []byte,
+) *spoof.Spoof {
+	if v.GetTimestampFn == nil {
+		panic(fmt.Errorf("timestamp parse function not specified"))
+	}
+	timestamp, err := v.GetTimestampFn(req)
+	if err != nil {
+		panic(err)
+	}
+	if timestamp != nil && *timestamp >= v.ExpiringTimestamp {
+		if v.FallibleLogger == nil {
+			panic(fmt.Errorf("test is nil"))
+		}
+		v.FallibleLogger.Logf(
+			"FAIL: received directive using expired endpoint %s: timestamp %d >= %d",
+			v.Endpoint,
+			*timestamp,
+			v.ExpiringTimestamp,
+		)
+		v.FallibleLogger.Fail()
+	}
+	return nil
+}
+
+func (v *EngineEndpointMaxTimestampVerify) AddToProxy(p *proxy.Proxy) error {
+	if p == nil {
+		return fmt.Errorf("attempted to add to nil proxy")
+	}
+	if v.Endpoint == "" {
+		return fmt.Errorf("attempted to add to proxy with empty endpoint")
+	}
+	p.AddRequestCallback(v.Endpoint, v.Verify)
+	return nil
+}
+
+func NewEngineMaxTimestampVerifier(
+	t FallibleLogger,
+	endpoint string,
+	expiringTimestamp uint64,
+) *EngineEndpointMaxTimestampVerify {
+	var getTimestampFn func([]byte) (*uint64, error)
+	if slices.Contains(EngineNewPayload, endpoint) {
+		getTimestampFn = GetTimestampFromNewPayload
+	} else if slices.Contains(EngineForkchoiceUpdated, endpoint) {
+		getTimestampFn = GetTimestampFromFcU
+	} else {
+		panic(fmt.Errorf("invalid endpoint for verification"))
+	}
+
+	return &EngineEndpointMaxTimestampVerify{
+		Endpoint:          endpoint,
+		ExpiringTimestamp: expiringTimestamp,
+		FallibleLogger:    t,
+		GetTimestampFn:    getTimestampFn,
+	}
+}
diff --git a/simulators/eth2/withdrawals/scenarios.go b/simulators/eth2/withdrawals/scenarios.go
index 2b9fb970e4..88d0929db3 100644
--- a/simulators/eth2/withdrawals/scenarios.go
+++ b/simulators/eth2/withdrawals/scenarios.go
@@ -8,6 +8,8 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/hive/hivesim"
 	"github.com/ethereum/hive/simulators/eth2/common/clients"
+
+	beacon_verification "github.com/ethereum/hive/simulators/eth2/common/spoofing/beacon"
 	tn "github.com/ethereum/hive/simulators/eth2/common/testnet"
 	"github.com/protolambda/eth2api"
 	beacon "github.com/protolambda/zrnt/eth2/beacon/common"
@@ -31,6 +33,25 @@ func (ts BaseWithdrawalsTestSpec) Execute(
 	testnet := tn.StartTestnet(ctx, t, env, config)
 	defer testnet.Stop()
 
+	// Add verification of Beacon->Execution Engine API calls to the proxies
+
+	// NewPayloadV1 expires at ShanghaiTime
+	newPayloadV1ExpireVerifier := beacon_verification.NewEngineMaxTimestampVerifier(
+		t,
+		beacon_verification.EngineNewPayloadV1,
+		testnet.ExecutionGenesis().Config.ShanghaiTime.Uint64(),
+	)
+	// ForkchoiceUpdatedV1 expires at ShanghaiTime
+	forkchoiceUpdatedV1ExpireVerifier := beacon_verification.NewEngineMaxTimestampVerifier(
+		t,
+		beacon_verification.EngineForkchoiceUpdatedV1,
+		testnet.ExecutionGenesis().Config.ShanghaiTime.Uint64(),
+	)
+	for _, e := range testnet.ExecutionClients() {
+		newPayloadV1ExpireVerifier.AddToProxy(e.Proxy())
+		forkchoiceUpdatedV1ExpireVerifier.AddToProxy(e.Proxy())
+	}
+
 	blsDomain := ComputeBLSToExecutionDomain(testnet)
 
 	// Get all validators info