diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/PostCreateDto.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/PostCreateDto.kt
index d863489a..9d699fb7 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/PostCreateDto.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/dto/PostCreateDto.kt
@@ -1,3 +1,3 @@
 package dev.usbharu.hideout.domain.model.hideout.dto
 
-data class PostCreateDto(val text: String, val username: String)
+data class PostCreateDto(val text: String, val userId: Long)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Post.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Post.kt
index 7e654ab2..bc768d32 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Post.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Post.kt
@@ -1,3 +1,11 @@
 package dev.usbharu.hideout.domain.model.hideout.form
 
-data class Post(val text: String)
+import dev.usbharu.hideout.domain.model.hideout.entity.Visibility
+
+data class Post(
+    val text: String,
+    val overview: String? = null,
+    val visibility: Visibility = Visibility.PUBLIC,
+    val repostId: Long? = null,
+    val replyId: Long? = null
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Posts.kt b/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Posts.kt
index ab5fb85b..7477cf6c 100644
--- a/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Posts.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Posts.kt
@@ -5,10 +5,12 @@ import dev.usbharu.hideout.domain.model.hideout.form.Post
 import dev.usbharu.hideout.plugins.TOKEN_AUTH
 import dev.usbharu.hideout.service.IPostService
 import dev.usbharu.hideout.util.InstantParseUtil
+import io.ktor.http.*
 import io.ktor.server.application.*
 import io.ktor.server.auth.*
 import io.ktor.server.auth.jwt.*
 import io.ktor.server.request.*
+import io.ktor.server.response.*
 import io.ktor.server.routing.*
 
 fun Route.posts(postService: IPostService) {
@@ -16,11 +18,13 @@ fun Route.posts(postService: IPostService) {
         authenticate(TOKEN_AUTH) {
             post {
                 val principal = call.principal<JWTPrincipal>() ?: throw RuntimeException("no principal")
-                val username = principal.payload.getClaim("uid").asString()
+                val userId = principal.payload.getClaim("uid").asLong()
 
                 val receive = call.receive<Post>()
-                val postCreateDto = PostCreateDto(receive.text, username)
-                postService.create(postCreateDto)
+                val postCreateDto = PostCreateDto(receive.text, userId)
+                val create = postService.create(postCreateDto)
+                call.response.header("Location", create.url)
+                call.respond(HttpStatusCode.OK)
             }
         }
         authenticate(TOKEN_AUTH, optional = true) {
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/IPostService.kt b/src/main/kotlin/dev/usbharu/hideout/service/IPostService.kt
index bf64ac10..0b4b4d59 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/IPostService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/IPostService.kt
@@ -5,8 +5,8 @@ import dev.usbharu.hideout.domain.model.hideout.entity.Post
 import java.time.Instant
 
 interface IPostService {
-    suspend fun create(post: Post)
-    suspend fun create(post: PostCreateDto)
+    suspend fun create(post: Post): Post
+    suspend fun create(post: PostCreateDto): Post
     suspend fun findAll(
         since: Instant? = null,
         until: Instant? = null,
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/impl/PostService.kt b/src/main/kotlin/dev/usbharu/hideout/service/impl/PostService.kt
index d8ec4f5f..137075b1 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/impl/PostService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/impl/PostService.kt
@@ -25,21 +25,23 @@ class PostService(
 
     private val logger = LoggerFactory.getLogger(this::class.java)
 
-    override suspend fun create(post: Post) {
+    override suspend fun create(post: Post): Post {
         logger.debug("create post={}", post)
         val postEntity = postRepository.save(post)
         activityPubNoteService.createNote(postEntity)
+        return post
     }
 
-    override suspend fun create(post: PostCreateDto) {
+    override suspend fun create(post: PostCreateDto): Post {
         logger.debug("create post={}", post)
-        val user = userService.findByNameLocalUser(post.username)
+        val user = userService.findById(post.userId)
         val id = postRepository.generateId()
         val postEntity = Post(
             id, user.id, null, post.text,
             Instant.now().toEpochMilli(), Visibility.PUBLIC, "${user.url}/posts/$id", null, null
         )
         postRepository.save(postEntity)
+        return postEntity
     }
 
     override suspend fun findAll(
diff --git a/src/test/kotlin/dev/usbharu/hideout/routing/api/internal/v1/PostsKtTest.kt b/src/test/kotlin/dev/usbharu/hideout/routing/api/internal/v1/PostsKtTest.kt
new file mode 100644
index 00000000..de9e768a
--- /dev/null
+++ b/src/test/kotlin/dev/usbharu/hideout/routing/api/internal/v1/PostsKtTest.kt
@@ -0,0 +1,84 @@
+package dev.usbharu.hideout.routing.api.internal.v1
+
+import com.auth0.jwt.interfaces.Claim
+import com.auth0.jwt.interfaces.Payload
+import dev.usbharu.hideout.config.Config
+import dev.usbharu.hideout.domain.model.hideout.dto.PostCreateDto
+import dev.usbharu.hideout.domain.model.hideout.entity.Visibility
+import dev.usbharu.hideout.domain.model.hideout.form.Post
+import dev.usbharu.hideout.plugins.TOKEN_AUTH
+import dev.usbharu.hideout.plugins.configureSerialization
+import dev.usbharu.hideout.service.IPostService
+import io.ktor.client.request.*
+import io.ktor.http.*
+import io.ktor.server.auth.*
+import io.ktor.server.auth.jwt.*
+import io.ktor.server.config.*
+import io.ktor.server.routing.*
+import io.ktor.server.testing.*
+import org.junit.jupiter.api.Test
+import org.mockito.kotlin.*
+import java.time.Instant
+import kotlin.test.assertEquals
+
+class PostsKtTest {
+
+
+    @Test
+    fun `posts-post postsにpostしたら投稿できる`() = testApplication {
+        environment {
+            config = ApplicationConfig("empty.conf")
+        }
+        val claim = mock<Claim> {
+            on { asLong() } doReturn 1234
+        }
+        val payload = mock<Payload> {
+            on { getClaim(eq("uid")) } doReturn claim
+        }
+        val postService = mock<IPostService> {
+            onBlocking { create(any<PostCreateDto>()) } doAnswer {
+                val argument = it.getArgument<PostCreateDto>(0)
+                dev.usbharu.hideout.domain.model.hideout.entity.Post(
+                    123L,
+                    argument.userId,
+                    null,
+                    argument.text,
+                    Instant.now().toEpochMilli(),
+                    Visibility.PUBLIC,
+                    "https://example.com"
+                )
+            }
+        }
+        application {
+            authentication {
+
+                bearer(TOKEN_AUTH) {
+                    authenticate {
+                        println("aaaaaaaaaaaa")
+                        JWTPrincipal(payload)
+                    }
+                }
+            }
+            routing {
+                route("/api/internal/v1") {
+                    posts(postService)
+                }
+            }
+            configureSerialization()
+        }
+
+        val post = Post("test")
+        client.post("/api/internal/v1/posts") {
+            header("Authorization", "Bearer asdkaf")
+            contentType(ContentType.Application.Json)
+            setBody(Config.configData.objectMapper.writeValueAsString(post))
+        }.apply {
+            assertEquals(HttpStatusCode.OK, status)
+            assertEquals("https://example.com", headers["Location"])
+        }
+        argumentCaptor<PostCreateDto> {
+            verify(postService).create(capture())
+            assertEquals(PostCreateDto("test", 1234), firstValue)
+        }
+    }
+}