diff --git a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonApiController.kt b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonApiController.kt
index 8d3677c5..e04e803e 100644
--- a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonApiController.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonApiController.kt
@@ -1,15 +1,30 @@
 package dev.usbharu.hideout.controller.mastodon
 
 import dev.usbharu.hideout.controller.mastodon.generated.DefaultApi
+import dev.usbharu.hideout.domain.mastodon.model.generated.Status
+import dev.usbharu.hideout.domain.mastodon.model.generated.StatusesRequest
 import dev.usbharu.hideout.domain.mastodon.model.generated.V1Instance
+import dev.usbharu.hideout.domain.model.UserDetailsImpl
 import dev.usbharu.hideout.service.api.mastodon.InstanceApiService
+import dev.usbharu.hideout.service.api.mastodon.StatusesApiService
 import org.springframework.http.HttpStatus
 import org.springframework.http.ResponseEntity
+import org.springframework.security.core.context.SecurityContextHolder
 import org.springframework.stereotype.Controller
 
+
 @Controller
-class MastodonApiController(private val instanceApiService: InstanceApiService) : DefaultApi {
+class MastodonApiController(
+    private val instanceApiService: InstanceApiService,
+    private val statusesApiService: StatusesApiService
+) : DefaultApi {
     override suspend fun apiV1InstanceGet(): ResponseEntity<V1Instance> {
         return ResponseEntity(instanceApiService.v1Instance(), HttpStatus.OK)
     }
+
+    override suspend fun apiV1StatusesPost(statusesRequest: StatusesRequest): ResponseEntity<Status> {
+        val principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal()
+        require(principal is UserDetailsImpl)
+        return ResponseEntity(statusesApiService.postStatus(statusesRequest, principal), HttpStatus.OK)
+    }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/UserDetailsImpl.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/UserDetailsImpl.kt
new file mode 100644
index 00000000..dff04cdc
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/UserDetailsImpl.kt
@@ -0,0 +1,21 @@
+package dev.usbharu.hideout.domain.model
+
+import org.springframework.security.core.GrantedAuthority
+import org.springframework.security.core.userdetails.User
+import java.io.Serial
+
+class UserDetailsImpl(
+    val id: Long,
+    username: String?,
+    password: String?,
+    enabled: Boolean,
+    accountNonExpired: Boolean,
+    credentialsNonExpired: Boolean,
+    accountNonLocked: Boolean,
+    authorities: MutableCollection<out GrantedAuthority>?
+) : User(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, authorities) {
+    companion object {
+        @Serial
+        private const val serialVersionUID: Long = -899168205656607781L
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/StatusesApiService.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/StatusesApiService.kt
new file mode 100644
index 00000000..17c8c794
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/StatusesApiService.kt
@@ -0,0 +1,105 @@
+package dev.usbharu.hideout.service.api.mastodon
+
+import dev.usbharu.hideout.domain.mastodon.model.generated.Status
+import dev.usbharu.hideout.domain.mastodon.model.generated.StatusesRequest
+import dev.usbharu.hideout.domain.model.UserDetailsImpl
+import dev.usbharu.hideout.domain.model.hideout.dto.PostCreateDto
+import dev.usbharu.hideout.domain.model.hideout.entity.Visibility
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
+import dev.usbharu.hideout.query.PostQueryService
+import dev.usbharu.hideout.query.UserQueryService
+import dev.usbharu.hideout.service.mastodon.AccountService
+import dev.usbharu.hideout.service.post.PostService
+import org.springframework.stereotype.Service
+import java.time.Instant
+
+@Service
+interface StatusesApiService {
+    suspend fun postStatus(statusesRequest: StatusesRequest, user: UserDetailsImpl): Status
+}
+
+
+@Service
+class StatsesApiServiceImpl(
+    private val postService: PostService,
+    private val accountService: AccountService,
+    private val postQueryService: PostQueryService,
+    private val userQueryService: UserQueryService
+) :
+    StatusesApiService {
+    override suspend fun postStatus(statusesRequest: StatusesRequest, user: UserDetailsImpl): Status {
+
+        val visibility = when (statusesRequest.visibility) {
+            StatusesRequest.Visibility.public -> Visibility.PUBLIC
+            StatusesRequest.Visibility.unlisted -> Visibility.UNLISTED
+            StatusesRequest.Visibility.private -> Visibility.FOLLOWERS
+            StatusesRequest.Visibility.direct -> Visibility.DIRECT
+            null -> Visibility.PUBLIC
+        }
+
+        val post = postService.createLocal(
+            PostCreateDto(
+                statusesRequest.status.orEmpty(),
+                statusesRequest.spoilerText,
+                visibility,
+                null,
+                statusesRequest.inReplyToId?.toLongOrNull(),
+                user.id
+            )
+        )
+        val account = accountService.findById(user.id)
+
+        val postVisibility = when (statusesRequest.visibility) {
+            StatusesRequest.Visibility.public -> Status.Visibility.public
+            StatusesRequest.Visibility.unlisted -> Status.Visibility.unlisted
+            StatusesRequest.Visibility.private -> Status.Visibility.private
+            StatusesRequest.Visibility.direct -> Status.Visibility.direct
+            null -> Status.Visibility.public
+        }
+
+        val replyUser = if (post.replyId != null) {
+            try {
+                userQueryService.findById(postQueryService.findById(post.replyId).userId).id
+            } catch (e: FailedToGetResourcesException) {
+                null
+            }
+        } else {
+            null
+        }
+
+
+        return Status(
+            id = post.id.toString(),
+            uri = post.apId,
+            createdAt = Instant.ofEpochMilli(post.createdAt).toString(),
+            account = account,
+            content = post.text,
+            visibility = postVisibility,
+            sensitive = post.sensitive,
+            spoilerText = post.overview.orEmpty(),
+            mediaAttachments = emptyList(),
+            mentions = emptyList(),
+            tags = emptyList(),
+            emojis = emptyList(),
+            reblogsCount = 0,
+            favouritesCount = 0,
+            repliesCount = 0,
+            url = post.url,
+            post.replyId?.toString(),
+            inReplyToAccountId = replyUser?.toString(),
+            reblog = null,
+            language = null,
+            text = post.text,
+            editedAt = null,
+            application = null,
+            poll = null,
+            card = null,
+            favourited = null,
+            reblogged = null,
+            muted = null,
+            bookmarked = null,
+            pinned = null,
+            filtered = null
+        )
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/mastodon/AccountService.kt b/src/main/kotlin/dev/usbharu/hideout/service/mastodon/AccountService.kt
index 4486857c..d3347aca 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/mastodon/AccountService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/mastodon/AccountService.kt
@@ -1,8 +1,39 @@
 package dev.usbharu.hideout.service.mastodon
 
+import dev.usbharu.hideout.domain.mastodon.model.generated.Account
+import dev.usbharu.hideout.query.UserQueryService
 import org.springframework.stereotype.Service
 
 @Service
 interface AccountService {
-    suspend fun findById()
+    suspend fun findById(id: Long): Account
+}
+
+@Service
+class AccountServiceImpl(private val userQueryService: UserQueryService) : AccountService {
+    override suspend fun findById(id: Long): Account {
+        val findById = userQueryService.findById(id)
+        return Account(
+            id = findById.id.toString(),
+            username = findById.name,
+            acct = "${findById.name}@${findById.domain}",
+            url = findById.url,
+            displayName = findById.screenName,
+            note = findById.description,
+            avatar = findById.url + "/icon.jpg",
+            avatarStatic = findById.url + "/icon.jpg",
+            header = findById.url + "/header.jpg",
+            headerStatic = findById.url + "/header.jpg",
+            locked = false,
+            emptyList(),
+            emptyList(),
+            false,
+            false,
+            false,
+            findById.createdAt.toString(),
+            findById.createdAt.toString(),
+            0,
+            0,
+        )
+    }
 }
diff --git a/src/main/resources/openapi/mastodon.yaml b/src/main/resources/openapi/mastodon.yaml
index aa18edf3..4c9755ad 100644
--- a/src/main/resources/openapi/mastodon.yaml
+++ b/src/main/resources/openapi/mastodon.yaml
@@ -97,6 +97,27 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/V1Instance"
+
+  /api/v1/statuses:
+    post:
+      security:
+        - OAuth2:
+            - "write:statuses"
+      requestBody:
+        description: 投稿する内容
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/StatusesRequest"
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Status"
+
 components:
   schemas:
     Account:
@@ -250,7 +271,7 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/StatusMention"
-        tag:
+        tags:
           type: array
           items:
             $ref: "#/components/schemas/StatusTag"
@@ -277,7 +298,7 @@ components:
           $ref: "#/components/schemas/Status"
         poll:
           $ref: "#/components/schemas/Poll"
-        PreviewCard:
+        card:
           $ref: "#/components/schemas/PreviewCard"
         language:
           type: string
@@ -302,7 +323,28 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/FilterResult"
-
+      required:
+        - id
+        - uri
+        - created_at
+        - account
+        - content
+        - visibility
+        - sensitive
+        - spoiler_text
+        - media_attachments
+        - mentions
+        - tags
+        - emojis
+        - reblogs_count
+        - favourites_count
+        - replies_count
+        - url
+        - in_reply_to_id
+        - in_reply_to_account_id
+        - language
+        - text
+        - edited_at
 
     MediaAttachment:
       type: object
@@ -844,3 +886,95 @@ components:
           type: string
         content:
           type: string
+
+    StatusesRequest:
+      type: object
+      properties:
+        status:
+          type: string
+          nullable: true
+        media_ids:
+          type: array
+          items:
+            type: string
+        poll:
+          $ref: "#/components/schemas/StatusesRequestPoll"
+        in_reply_to_id:
+          type: string
+        sensitive:
+          type: boolean
+        spoiler_text:
+          type: string
+        visibility:
+          type: string
+          enum:
+            - public
+            - unlisted
+            - private
+            - direct
+        language:
+          type: string
+        scheduled_at:
+          type: string
+
+    StatusesRequestPoll:
+      type: object
+      properties:
+        options:
+          type: array
+          items:
+            type: string
+        expires_in:
+          type: integer
+        multiple:
+          type: boolean
+        hide_totals:
+          type: boolean
+
+  securitySchemes:
+    OAuth2:
+      type: oauth2
+      description: Mastodon Oauth
+      flows:
+        authorizationCode:
+          authorizationUrl: /oauth/authorize
+          tokenUrl: /oauth/token
+          scopes:
+            read:accounts: ""
+            read:blocks: ""
+            read:bookmarks: ""
+            read:favourites: ""
+            read:filters: ""
+            read:follows: ""
+            read:lists: ""
+            read:mutes: ""
+            read:notifications: ""
+            read:search: ""
+            read:statuses: ""
+            write:accounts: ""
+            write:blocks: ""
+            write:bookmarks: ""
+            write:conversations: ""
+            write:favourites: ""
+            write:filters: ""
+            write:follows: ""
+            write:lists: ""
+            write:media: ""
+            write:mutes: ""
+            write:notifications: ""
+            write:reports: ""
+            write:statuses: ""
+            admin:read:accounts: ""
+            admin:read:reports: ""
+            admin:read:domain_allows: ""
+            admin:read:domain_blocks: ""
+            admin:read:ip_blocks: ""
+            admin:read:email_domain_blocks: ""
+            admin:read:canonical_email_blocks: ""
+            admin:write:accounts: ""
+            admin:write:reports: ""
+            admin:write:domain_allows: ""
+            admin:write:domain_blocks: ""
+            admin:write:ip_blocks: ""
+            admin:write:email_domain_blocks: ""
+            admin:write:canonical_email_blocks: ""