diff --git a/beacon-chain/rpc/endpoints.go b/beacon-chain/rpc/endpoints.go
index 7c3615cac..7ab147bf5 100644
--- a/beacon-chain/rpc/endpoints.go
+++ b/beacon-chain/rpc/endpoints.go
@@ -1148,7 +1148,7 @@ func (s *Service) overEndpoints(stater lookup.Stater) []endpoint {
 			template: "/chronos/validator/estimated_activation/{validator_id}",
 			name:     namespace + ".EstimatedActivation",
 			handler:  server.EstimatedActivation,
-			methods:  []string{http.MethodGet},
+			methods:  []string{http.MethodGet, http.MethodPost},
 		},
 		{
 			template: "/chronos/states/epoch_reward/{epoch}",
diff --git a/beacon-chain/rpc/endpoints_test.go b/beacon-chain/rpc/endpoints_test.go
index d21667ba5..5a7be2cc6 100644
--- a/beacon-chain/rpc/endpoints_test.go
+++ b/beacon-chain/rpc/endpoints_test.go
@@ -132,7 +132,7 @@ func Test_endpoints(t *testing.T) {
 	}
 
 	overRoutes := map[string][]string{
-		"/chronos/validator/estimated_activation/{validator_id}": {http.MethodGet},
+		"/chronos/validator/estimated_activation/{validator_id}": {http.MethodGet, http.MethodPost},
 		"/chronos/states/epoch_reward/{epoch}":                   {http.MethodGet},
 		"/over/v1/beacon/states/{state_id}/reserves":             {http.MethodGet},
 	}