diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/UpstreamRpcMethodsDetector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/UpstreamRpcMethodsDetector.kt
index fbde8ad2..5b6c3981 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/UpstreamRpcMethodsDetector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/UpstreamRpcMethodsDetector.kt
@@ -34,13 +34,17 @@ abstract class UpstreamRpcMethodsDetector(
                             .getIngressReader()
                             .read(ChainRequest(method, param))
                             .flatMap(ChainResponse::requireResult)
-                            .map { method to true }
+                            .map {
+                                method to true
+                            }
                             .onErrorResume { err ->
                                 val notAvailableError =
                                     notAvailableRegexps.any { s -> s.containsMatchIn(err.message ?: "") }
                                 if (notAvailableError) {
+                                    log.error("$method failed with ${err.message}, detect as false")
                                     Mono.just(method to false)
                                 } else {
+                                    log.error("$method failed with ${err.message}, do not detect")
                                     Mono.empty()
                                 }
                             }
@@ -50,7 +54,7 @@ abstract class UpstreamRpcMethodsDetector(
             it
                 .map { p -> p as Pair<String, Boolean> }
                 .associate { (method, enabled) -> method to enabled }
-        }
+        }.switchIfEmpty(Mono.just(emptyMap()))
 
     protected abstract fun detectByMagicMethod(): Mono<Map<String, Boolean>>
 
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetector.kt
index a2b03e4a..acc3a525 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetector.kt
@@ -33,6 +33,7 @@ class BasicEthUpstreamRpcMethodsDetector(
     override fun rpcMethods(): Set<Pair<String, CallParams>> =
         setOf(
             "eth_getBlockReceipts" to ListParams("latest"),
+            "trace_callMany" to ListParams(listOf(listOf<Any>())),
         )
 
     private fun parseRpcModules(data: ByteArray): Map<String, Boolean> {
diff --git a/src/test/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetectorTest.kt b/src/test/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetectorTest.kt
index d760e8b4..3951ceca 100644
--- a/src/test/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetectorTest.kt
+++ b/src/test/kotlin/io/emeraldpay/dshackle/upstream/ethereum/BasicEthUpstreamRpcMethodsDetectorTest.kt
@@ -39,6 +39,15 @@ class BasicEthUpstreamRpcMethodsDetectorTest {
                             null,
                         ),
                     )
+                on {
+                    read(ChainRequest("trace_callMany", ListParams(listOf(listOf<Any>()))))
+                } doReturn
+                    Mono.just(
+                        ChainResponse(
+                            "[]".toByteArray(),
+                            null,
+                        ),
+                    )
             }
 
         val upstream =
@@ -79,6 +88,15 @@ class BasicEthUpstreamRpcMethodsDetectorTest {
                             null,
                         ),
                     )
+                on {
+                    read(ChainRequest("trace_callMany", ListParams(listOf(listOf<Any>()))))
+                } doReturn
+                    Mono.just(
+                        ChainResponse(
+                            "[]".toByteArray(),
+                            null,
+                        ),
+                    )
             }
 
         val upstream =
@@ -90,8 +108,9 @@ class BasicEthUpstreamRpcMethodsDetectorTest {
         val detector = BasicEthUpstreamRpcMethodsDetector(upstream, config)
         Assertions.assertThat(detector.detectRpcMethods().block()).apply {
             isNotNull()
-            hasSize(1)
+            hasSize(2)
             containsEntry("eth_getBlockReceipts", true)
+            containsEntry("trace_callMany", true)
         }
     }
 
@@ -119,6 +138,15 @@ class BasicEthUpstreamRpcMethodsDetectorTest {
                             null,
                         ),
                     )
+                on {
+                    read(ChainRequest("trace_callMany", ListParams(listOf(listOf<Any>()))))
+                } doReturn
+                    Mono.just(
+                        ChainResponse(
+                            "[]".toByteArray(),
+                            null,
+                        ),
+                    )
             }
 
         val upstream =
diff --git a/src/test/kotlin/io/emeraldpay/dshackle/upstream/polkadot/BasicPolkadotUpstreamRpcMethodsDetectorTest.kt b/src/test/kotlin/io/emeraldpay/dshackle/upstream/polkadot/BasicPolkadotUpstreamRpcMethodsDetectorTest.kt
index 187990dd..8f2e715a 100644
--- a/src/test/kotlin/io/emeraldpay/dshackle/upstream/polkadot/BasicPolkadotUpstreamRpcMethodsDetectorTest.kt
+++ b/src/test/kotlin/io/emeraldpay/dshackle/upstream/polkadot/BasicPolkadotUpstreamRpcMethodsDetectorTest.kt
@@ -64,6 +64,6 @@ class BasicPolkadotUpstreamRpcMethodsDetectorTest {
                 on { getChain() } doReturn Chain.POLKADOT__MAINNET
             }
         val detector = BasicPolkadotUpstreamRpcMethodsDetector(upstream)
-        Assertions.assertThat(detector.detectRpcMethods().block()).isNull()
+        Assertions.assertThat(detector.detectRpcMethods().block()).isEqualTo(emptyMap<String, Boolean>())
     }
 }