diff --git a/build.gradle.kts b/build.gradle.kts
index f88635b8..4b91b4f7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -60,6 +60,8 @@ tasks.create<GenerateTask>("openApiGenerateMastodonCompatibleApi", GenerateTask:
     configOptions.put("interfaceOnly", "true")
     configOptions.put("useSpringBoot3", "true")
     additionalProperties.put("useTags", "true")
+    importMappings.put("org.springframework.core.io.Resource", "org.springframework.web.multipart.MultipartFile")
+    typeMappings.put("org.springframework.core.io.Resource", "org.springframework.web.multipart.MultipartFile")
 }
 
 repositories {
diff --git a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
new file mode 100644
index 00000000..e1951898
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
@@ -0,0 +1,19 @@
+package dev.usbharu.hideout.controller.mastodon
+
+import dev.usbharu.hideout.controller.mastodon.generated.MediaApi
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import org.springframework.http.ResponseEntity
+import org.springframework.stereotype.Controller
+import org.springframework.web.multipart.MultipartFile
+
+@Controller
+class MastodonMediaApiController : MediaApi {
+    override fun apiV1MediaPost(
+        file: MultipartFile,
+        thumbnail: MultipartFile?,
+        description: String?,
+        focus: String?
+    ): ResponseEntity<MediaAttachment> {
+
+    }
+}
diff --git a/src/main/resources/openapi/mastodon.yaml b/src/main/resources/openapi/mastodon.yaml
index 5464a28a..6f93fa36 100644
--- a/src/main/resources/openapi/mastodon.yaml
+++ b/src/main/resources/openapi/mastodon.yaml
@@ -17,6 +17,8 @@ tags:
     description: instance
   - name: timeline
     description: timeline
+  - name: media
+    description: media
 
 paths:
   /api/v2/instance:
@@ -291,9 +293,48 @@ paths:
                 type: array
                 items:
                   $ref: "#/components/schemas/Status"
+  /api/v1/media:
+    post:
+      tags:
+        - media
+      security:
+        - OAuth2:
+            - "write:media"
+      requestBody:
+        required: true
+        content:
+          multipart/form-data:
+            schema:
+              $ref: "#/components/schemas/V1MediaRequest"
+            encoding:
+              file:
+                contentType: image/jpeg, image/png
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MediaAttachment"
 
 components:
   schemas:
+    V1MediaRequest:
+      type: object
+      properties:
+        file:
+          type: string
+          format: binary
+        thumbnail:
+          type: string
+          format: binary
+        description:
+          type: string
+        focus:
+          type: string
+      required:
+        - file
+
     AccountsCreateRequest:
       type: object
       properties: