diff --git a/CHANGELOG.md b/CHANGELOG.md
index 624f83195c..0b4fcd9fc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## 27.1.0
 
+* `Core`:
+  * Improve support of local bot api servers files. Next call factories will try to resolve file locally before real call:
+    * [DownloadFileRequestCallFactory.kt](tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileRequestCallFactory.kt) (for [DownloadFile.kt](tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/DownloadFile.kt) as well)
+    * [DownloadFileChannelRequestCallFactory.kt](tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileChannelRequestCallFactory.kt) (for [DownloadFileStream.kt](tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/requests/DownloadFileStream.kt) as well)
+
 ## 27.0.0
 
 **THIS UPDATE MAY CONTAIN BREAKING CHANGES. IN CASE OF ANY MIGRATION PROBLEMS FEEL FREE TO ASK IN [OUR CHAT](https://t.me/ktgbotapi_chat)**
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileChannelRequestCallFactory.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileChannelRequestCallFactory.kt
index 4a1f3a5d54..548b4c800e 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileChannelRequestCallFactory.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileChannelRequestCallFactory.kt
@@ -1,6 +1,5 @@
 package dev.inmo.tgbotapi.bot.ktor.base
 
-import dev.inmo.micro_utils.coroutines.*
 import dev.inmo.tgbotapi.bot.ktor.KtorCallFactory
 import dev.inmo.tgbotapi.requests.DownloadFileStream
 import dev.inmo.tgbotapi.requests.abstracts.Request
@@ -22,7 +21,17 @@ object DownloadFileChannelRequestCallFactory : KtorCallFactory {
         request: Request<T>,
         jsonFormatter: Json
     ): T? = (request as? DownloadFileStream) ?.let {
-        val fullUrl = urlsKeeper.createFileLinkUrl(it.filePath)
+        val bodyChannelAllocator: suspend () -> ByteReadChannel = resolveFile(it.filePath) ?.let {
+            {
+                byteReadChannel(it)
+            }
+        } ?: let { _ ->
+            val fullUrl = urlsKeeper.createFileLinkUrl(it.filePath)
+            return@let {
+                val response = client.get(fullUrl)
+                response.bodyAsChannel()
+            }
+        }
 
         @Suppress("UNCHECKED_CAST")
         ByteReadChannelAllocator {
@@ -30,8 +39,7 @@ object DownloadFileChannelRequestCallFactory : KtorCallFactory {
             val outChannel = ByteChannel()
             scope.launch {
                 runCatching {
-                    val response = client.get(fullUrl)
-                    val channel: ByteReadChannel = response.bodyAsChannel()
+                    val channel: ByteReadChannel = bodyChannelAllocator()
                     channel.copyAndClose(outChannel)
                 }
                 scope.cancel()
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileRequestCallFactory.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileRequestCallFactory.kt
index 1b77b10a71..4fc2172b8f 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileRequestCallFactory.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DownloadFileRequestCallFactory.kt
@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.bot.ktor.base
 
+import dev.inmo.micro_utils.common.bytes
 import dev.inmo.micro_utils.coroutines.safely
 import dev.inmo.tgbotapi.bot.ktor.KtorCallFactory
 import dev.inmo.tgbotapi.requests.DownloadFile
@@ -19,6 +20,10 @@ object DownloadFileRequestCallFactory : KtorCallFactory {
         request: Request<T>,
         jsonFormatter: Json,
     ): T? = (request as? DownloadFile)?.let {
+        resolveFile(it.filePath) ?.let {
+            return@makeCall it.bytes() as T // Always ByteArray
+        }
+
         val fullUrl = urlsKeeper.createFileLinkUrl(it.filePath)
 
         @Suppress("UNCHECKED_CAST")
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FilesWorkaround.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FilesWorkaround.kt
new file mode 100644
index 0000000000..6df0a80545
--- /dev/null
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FilesWorkaround.kt
@@ -0,0 +1,10 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+import dev.inmo.micro_utils.ktor.common.input
+import io.ktor.utils.io.ByteReadChannel
+
+internal fun byteReadChannel(file: MPPFile): ByteReadChannel {
+    return ByteReadChannel(file.input())
+}
+internal expect fun resolveFile(filename: String): MPPFile?
\ No newline at end of file
diff --git a/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.js.kt b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.js.kt
new file mode 100644
index 0000000000..f3ea23e4cf
--- /dev/null
+++ b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.js.kt
@@ -0,0 +1,5 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+
+internal actual fun resolveFile(filename: String): MPPFile? = null // on JS in common case there is no opportunity to take file based on its name
\ No newline at end of file
diff --git a/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.jvm.kt b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.jvm.kt
new file mode 100644
index 0000000000..de6d101859
--- /dev/null
+++ b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.jvm.kt
@@ -0,0 +1,7 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+
+internal actual fun resolveFile(filename: String): MPPFile? = runCatching {
+    MPPFile(filename).takeIf { it.exists() && it.isFile }
+}.getOrElse { null }
diff --git a/tgbotapi.core/src/linuxArm64Main/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linuxArm64.kt b/tgbotapi.core/src/linuxArm64Main/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linuxArm64.kt
new file mode 100644
index 0000000000..cc3da73f5c
--- /dev/null
+++ b/tgbotapi.core/src/linuxArm64Main/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linuxArm64.kt
@@ -0,0 +1,11 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+import okio.FileSystem
+import okio.Path
+
+internal actual fun resolveFile(filename: String): MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file
diff --git a/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linux.kt b/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linux.kt
new file mode 100644
index 0000000000..ddc3bf8dd5
--- /dev/null
+++ b/tgbotapi.core/src/linuxMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.linux.kt
@@ -0,0 +1,10 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import okio.FileSystem
+import okio.Path
+
+internal actual fun resolveFile(filename: String): dev.inmo.micro_utils.common.MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file
diff --git a/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/FileResolver.linuxX64.kt b/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/FileResolver.linuxX64.kt
new file mode 100644
index 0000000000..cc3da73f5c
--- /dev/null
+++ b/tgbotapi.core/src/linuxX64Main/kotlin/bot/ktor/base/FileResolver.linuxX64.kt
@@ -0,0 +1,11 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+import okio.FileSystem
+import okio.Path
+
+internal actual fun resolveFile(filename: String): MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file
diff --git a/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.mingw.kt b/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.mingw.kt
new file mode 100644
index 0000000000..e4a1de5fd7
--- /dev/null
+++ b/tgbotapi.core/src/mingwMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.mingw.kt
@@ -0,0 +1,11 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import okio.FileSystem
+import okio.Path
+import okio.Path.Companion.toPath
+
+internal actual fun resolveFile(filename: String): dev.inmo.micro_utils.common.MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file
diff --git a/tgbotapi.core/src/mingwX64Main/kotlin/dev/inmo/tgbotapi/bot/ktor/base/ActualPlatformClientCopy.kt b/tgbotapi.core/src/mingwX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
similarity index 100%
rename from tgbotapi.core/src/mingwX64Main/kotlin/dev/inmo/tgbotapi/bot/ktor/base/ActualPlatformClientCopy.kt
rename to tgbotapi.core/src/mingwX64Main/kotlin/bot/ktor/base/ActualPlatformClientCopy.kt
diff --git a/tgbotapi.core/src/mingwX64Main/kotlin/bot/ktor/base/FileResolver.mingwX64.kt b/tgbotapi.core/src/mingwX64Main/kotlin/bot/ktor/base/FileResolver.mingwX64.kt
new file mode 100644
index 0000000000..1d08540d3a
--- /dev/null
+++ b/tgbotapi.core/src/mingwX64Main/kotlin/bot/ktor/base/FileResolver.mingwX64.kt
@@ -0,0 +1,12 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import dev.inmo.micro_utils.common.MPPFile
+import okio.FileSystem
+import okio.Path
+import okio.Path.Companion.toPath
+
+internal actual fun resolveFile(filename: String): MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file
diff --git a/tgbotapi.core/src/nativeMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.native.kt b/tgbotapi.core/src/nativeMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.native.kt
new file mode 100644
index 0000000000..e4a1de5fd7
--- /dev/null
+++ b/tgbotapi.core/src/nativeMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/FileResolver.native.kt
@@ -0,0 +1,11 @@
+package dev.inmo.tgbotapi.bot.ktor.base
+
+import okio.FileSystem
+import okio.Path
+import okio.Path.Companion.toPath
+
+internal actual fun resolveFile(filename: String): dev.inmo.micro_utils.common.MPPFile? = runCatching {
+    with(Path) { filename.toPath() }.takeIf {
+        FileSystem.SYSTEM.exists(it) && FileSystem.SYSTEM.metadata(it).isRegularFile
+    }
+}.getOrElse { null }
\ No newline at end of file