diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
index a6a5f8b8..93f3f4cf 100644
--- a/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/ap/Person.kt
@@ -8,6 +8,8 @@ open class Person : Object {
     var url: String? = null
     private var icon: Image? = null
     var publicKey: Key? = null
+    var endpoints: Map<String, String> = emptyMap()
+
 
     protected constructor() : super()
 
@@ -22,7 +24,8 @@ open class Person : Object {
         outbox: String?,
         url: String?,
         icon: Image?,
-        publicKey: Key?
+        publicKey: Key?,
+        endpoints: Map<String, String> = emptyMap()
     ) : super(add(type, "Person"), name, id = id) {
         this.preferredUsername = preferredUsername
         this.summary = summary
@@ -31,24 +34,28 @@ open class Person : Object {
         this.url = url
         this.icon = icon
         this.publicKey = publicKey
+        this.endpoints = endpoints
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
         if (other !is Person) return false
+        if (!super.equals(other)) return false
 
-        if (id != other.id) return false
         if (preferredUsername != other.preferredUsername) return false
         if (summary != other.summary) return false
         if (inbox != other.inbox) return false
         if (outbox != other.outbox) return false
         if (url != other.url) return false
         if (icon != other.icon) return false
-        return publicKey == other.publicKey
+        if (publicKey != other.publicKey) return false
+        if (endpoints != other.endpoints) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
-        var result = id?.hashCode() ?: 0
+        var result = super.hashCode()
         result = 31 * result + (preferredUsername?.hashCode() ?: 0)
         result = 31 * result + (summary?.hashCode() ?: 0)
         result = 31 * result + (inbox?.hashCode() ?: 0)
@@ -56,6 +63,8 @@ open class Person : Object {
         result = 31 * result + (url?.hashCode() ?: 0)
         result = 31 * result + (icon?.hashCode() ?: 0)
         result = 31 * result + (publicKey?.hashCode() ?: 0)
+        result = 31 * result + endpoints.hashCode()
         return result
     }
+
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/FailedToGetResourcesException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/FailedToGetResourcesException.kt
new file mode 100644
index 00000000..95cd08a9
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/FailedToGetResourcesException.kt
@@ -0,0 +1,8 @@
+package dev.usbharu.hideout.exception
+
+open class FailedToGetResourcesException : IllegalArgumentException {
+    constructor() : super()
+    constructor(s: String?) : super(s)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/plugins/StatusPages.kt b/src/main/kotlin/dev/usbharu/hideout/plugins/StatusPages.kt
index fed89e28..68b1f541 100644
--- a/src/main/kotlin/dev/usbharu/hideout/plugins/StatusPages.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/plugins/StatusPages.kt
@@ -7,16 +7,18 @@ import io.ktor.server.plugins.statuspages.*
 import io.ktor.server.response.*
 
 fun Application.configureStatusPages() {
+
     install(StatusPages) {
         exception<IllegalArgumentException> { call, cause ->
             call.respondText(text = "400: $cause", status = HttpStatusCode.BadRequest)
+            call.application.log.warn("Bad Request", cause)
         }
         exception<InvalidUsernameOrPasswordException> { call, _ ->
             call.respond(HttpStatusCode.Unauthorized)
         }
         exception<Throwable> { call, cause ->
             call.respondText(text = "500: ${cause.stackTraceToString()}", status = HttpStatusCode.InternalServerError)
-            cause.printStackTrace()
+            call.application.log.error("Internal Server Error", cause)
         }
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryService.kt b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryService.kt
index 3ca4e4e6..4922b268 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryService.kt
@@ -9,4 +9,5 @@ interface FollowerQueryService {
     suspend fun findFollowingByNameAndDomain(name: String, domain: String): List<User>
     suspend fun appendFollower(user: Long, follower: Long)
     suspend fun removeFollower(user: Long, follower: Long)
+    suspend fun alreadyFollow(userId: Long, followerId: Long): Boolean
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
index e360ed4f..c9f0bdc8 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/FollowerQueryServiceImpl.kt
@@ -198,6 +198,12 @@ class FollowerQueryServiceImpl : FollowerQueryService {
     }
 
     override suspend fun removeFollower(user: Long, follower: Long) {
-        UsersFollowers.deleteWhere { Users.id eq user and (followerId eq follower) }
+        UsersFollowers.deleteWhere { userId eq user and (followerId eq follower) }
+    }
+
+    override suspend fun alreadyFollow(userId: Long, followerId: Long): Boolean {
+        return UsersFollowers.select { UsersFollowers.userId eq userId or (UsersFollowers.followerId eq followerId) }
+            .empty()
+            .not()
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/JwtRefreshTokenQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/JwtRefreshTokenQueryServiceImpl.kt
index 672b3b43..7b6affff 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/JwtRefreshTokenQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/JwtRefreshTokenQueryServiceImpl.kt
@@ -1,8 +1,10 @@
 package dev.usbharu.hideout.query
 
 import dev.usbharu.hideout.domain.model.hideout.entity.JwtRefreshToken
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.repository.JwtRefreshTokens
 import dev.usbharu.hideout.repository.toJwtRefreshToken
+import dev.usbharu.hideout.util.singleOr
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
 import org.jetbrains.exposed.sql.deleteAll
 import org.jetbrains.exposed.sql.deleteWhere
@@ -12,13 +14,19 @@ import org.koin.core.annotation.Single
 @Single
 class JwtRefreshTokenQueryServiceImpl : JwtRefreshTokenQueryService {
     override suspend fun findById(id: Long): JwtRefreshToken =
-        JwtRefreshTokens.select { JwtRefreshTokens.id.eq(id) }.single().toJwtRefreshToken()
+        JwtRefreshTokens.select { JwtRefreshTokens.id.eq(id) }
+            .singleOr { FailedToGetResourcesException("id: $id is a duplicate or does not exist.", it) }
+            .toJwtRefreshToken()
 
     override suspend fun findByToken(token: String): JwtRefreshToken =
-        JwtRefreshTokens.select { JwtRefreshTokens.refreshToken.eq(token) }.single().toJwtRefreshToken()
+        JwtRefreshTokens.select { JwtRefreshTokens.refreshToken.eq(token) }
+            .singleOr { FailedToGetResourcesException("token: $token is a duplicate or does not exist.", it) }
+            .toJwtRefreshToken()
 
     override suspend fun findByUserId(userId: Long): JwtRefreshToken =
-        JwtRefreshTokens.select { JwtRefreshTokens.userId.eq(userId) }.single().toJwtRefreshToken()
+        JwtRefreshTokens.select { JwtRefreshTokens.userId.eq(userId) }
+            .singleOr { FailedToGetResourcesException("userId: $userId is a duplicate or does not exist.", it) }
+            .toJwtRefreshToken()
 
     override suspend fun deleteById(id: Long) {
         JwtRefreshTokens.deleteWhere { JwtRefreshTokens.id eq id }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/PostQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/PostQueryServiceImpl.kt
index 1b3969c7..4f98710b 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/PostQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/PostQueryServiceImpl.kt
@@ -1,16 +1,22 @@
 package dev.usbharu.hideout.query
 
 import dev.usbharu.hideout.domain.model.hideout.entity.Post
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.repository.Posts
 import dev.usbharu.hideout.repository.toPost
+import dev.usbharu.hideout.util.singleOr
 import org.jetbrains.exposed.sql.select
 import org.koin.core.annotation.Single
 
 @Single
 class PostQueryServiceImpl : PostQueryService {
-    override suspend fun findById(id: Long): Post = Posts.select { Posts.id eq id }.single().toPost()
+    override suspend fun findById(id: Long): Post =
+        Posts.select { Posts.id eq id }
+            .singleOr { FailedToGetResourcesException("id: $id is duplicate or does not exist.", it) }.toPost()
 
-    override suspend fun findByUrl(url: String): Post = Posts.select { Posts.url eq url }.single().toPost()
+    override suspend fun findByUrl(url: String): Post = Posts.select { Posts.url eq url }
+        .singleOr { FailedToGetResourcesException("url: $url is duplicate or does not exist.", it) }.toPost()
 
-    override suspend fun findByApId(string: String): Post = Posts.select { Posts.apId eq string }.single().toPost()
+    override suspend fun findByApId(string: String): Post = Posts.select { Posts.apId eq string }
+        .singleOr { FailedToGetResourcesException("apId: $string is duplicate or does not exist.", it) }.toPost()
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/PostResponseQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/PostResponseQueryServiceImpl.kt
index 51bd8ebe..a8ef3930 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/PostResponseQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/PostResponseQueryServiceImpl.kt
@@ -1,10 +1,12 @@
 package dev.usbharu.hideout.query
 
 import dev.usbharu.hideout.domain.model.hideout.dto.PostResponse
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.repository.Posts
 import dev.usbharu.hideout.repository.Users
 import dev.usbharu.hideout.repository.toPost
 import dev.usbharu.hideout.repository.toUser
+import dev.usbharu.hideout.util.singleOr
 import org.jetbrains.exposed.sql.and
 import org.jetbrains.exposed.sql.innerJoin
 import org.jetbrains.exposed.sql.select
@@ -17,7 +19,7 @@ class PostResponseQueryServiceImpl : PostResponseQueryService {
         return Posts
             .innerJoin(Users, onColumn = { Posts.userId }, otherColumn = { Users.id })
             .select { Posts.id eq id }
-            .single()
+            .singleOr { FailedToGetResourcesException("id: $id,userId: $userId is a duplicate or does not exist.", it) }
             .let { PostResponse.from(it.toPost(), it.toUser()) }
     }
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt
index ff1d5ab3..00baae4e 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/ReactionQueryServiceImpl.kt
@@ -3,9 +3,11 @@ package dev.usbharu.hideout.query
 import dev.usbharu.hideout.domain.model.hideout.dto.Account
 import dev.usbharu.hideout.domain.model.hideout.dto.ReactionResponse
 import dev.usbharu.hideout.domain.model.hideout.entity.Reaction
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.repository.Reactions
 import dev.usbharu.hideout.repository.Users
 import dev.usbharu.hideout.repository.toReaction
+import dev.usbharu.hideout.util.singleOr
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
 import org.koin.core.annotation.Single
@@ -26,7 +28,12 @@ class ReactionQueryServiceImpl : ReactionQueryService {
                     Reactions.emojiId.eq(emojiId)
                 )
             }
-            .single()
+            .singleOr {
+                FailedToGetResourcesException(
+                    "postId: $postId,userId: $userId,emojiId: $emojiId is duplicate or does not exist.",
+                    it
+                )
+            }
             .toReaction()
     }
 
diff --git a/src/main/kotlin/dev/usbharu/hideout/query/UserQueryServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/query/UserQueryServiceImpl.kt
index 41042d8f..9d18d2cd 100644
--- a/src/main/kotlin/dev/usbharu/hideout/query/UserQueryServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/query/UserQueryServiceImpl.kt
@@ -1,8 +1,10 @@
 package dev.usbharu.hideout.query
 
 import dev.usbharu.hideout.domain.model.hideout.entity.User
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.repository.Users
 import dev.usbharu.hideout.repository.toUser
+import dev.usbharu.hideout.util.singleOr
 import org.jetbrains.exposed.sql.and
 import org.jetbrains.exposed.sql.select
 import org.jetbrains.exposed.sql.selectAll
@@ -13,14 +15,22 @@ class UserQueryServiceImpl : UserQueryService {
     override suspend fun findAll(limit: Int, offset: Long): List<User> =
         Users.selectAll().limit(limit, offset).map { it.toUser() }
 
-    override suspend fun findById(id: Long): User = Users.select { Users.id eq id }.single().toUser()
+    override suspend fun findById(id: Long): User = Users.select { Users.id eq id }
+        .singleOr { FailedToGetResourcesException("id: $id is duplicate or does not exist.", it) }.toUser()
 
     override suspend fun findByName(name: String): List<User> = Users.select { Users.name eq name }.map { it.toUser() }
 
     override suspend fun findByNameAndDomain(name: String, domain: String): User =
-        Users.select { Users.name eq name and (Users.domain eq domain) }.single().toUser()
+        Users
+            .select { Users.name eq name and (Users.domain eq domain) }
+            .singleOr {
+                FailedToGetResourcesException("name: $name,domain: $domain  is duplicate or does not exist.", it)
+            }
+            .toUser()
 
-    override suspend fun findByUrl(url: String): User = Users.select { Users.url eq url }.single().toUser()
+    override suspend fun findByUrl(url: String): User = Users.select { Users.url eq url }
+        .singleOr { FailedToGetResourcesException("url: $url  is duplicate or does not exist.", it) }
+        .toUser()
 
     override suspend fun findByIds(ids: List<Long>): List<User> =
         Users.select { Users.id inList ids }.map { it.toUser() }
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/PostRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/PostRepositoryImpl.kt
index 8782a54f..764bf32d 100644
--- a/src/main/kotlin/dev/usbharu/hideout/repository/PostRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/PostRepositoryImpl.kt
@@ -2,6 +2,7 @@ package dev.usbharu.hideout.repository
 
 import dev.usbharu.hideout.domain.model.hideout.entity.Post
 import dev.usbharu.hideout.domain.model.hideout.entity.Visibility
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.service.core.IdGenerateService
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
@@ -53,7 +54,8 @@ class PostRepositoryImpl(database: Database, private val idGenerateService: IdGe
         return post
     }
 
-    override suspend fun findById(id: Long): Post = Posts.select { Posts.id eq id }.single().toPost()
+    override suspend fun findById(id: Long): Post = Posts.select { Posts.id eq id }.singleOrNull()?.toPost()
+        ?: throw FailedToGetResourcesException("id: $id was not found.")
 
     override suspend fun delete(id: Long) {
         Posts.deleteWhere { Posts.id eq id }
diff --git a/src/main/kotlin/dev/usbharu/hideout/routing/activitypub/UserRouting.kt b/src/main/kotlin/dev/usbharu/hideout/routing/activitypub/UserRouting.kt
index c4b03cba..8543e9a7 100644
--- a/src/main/kotlin/dev/usbharu/hideout/routing/activitypub/UserRouting.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/routing/activitypub/UserRouting.kt
@@ -41,7 +41,12 @@ fun Routing.usersAP(
                         ?: throw ParameterNotExistException("Parameter(name='name') does not exist."),
                     Config.configData.domain
                 )
-                call.respondText(userEntity.toString() + "\n" + followerQueryService.findFollowersById(userEntity.id))
+                val personByName = apUserService.getPersonByName(userEntity.name)
+                call.respondText(
+                    userEntity.toString() + "\n" + followerQueryService.findFollowersById(userEntity.id) + "\n" + Config.configData.objectMapper.writeValueAsString(
+                        personByName
+                    )
+                )
             }
         }
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Users.kt b/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Users.kt
index 1a73c694..dd7b64f9 100644
--- a/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Users.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/routing/api/internal/v1/Users.kt
@@ -42,11 +42,11 @@ fun Route.users(userService: UserService, userApiService: UserApiService) {
             authenticate(TOKEN_AUTH, optional = true) {
                 get {
                     val userParameter = (
-                        call.parameters["name"]
-                            ?: throw ParameterNotExistException(
-                                "Parameter(name='userName@domain') does not exist."
+                            call.parameters["name"]
+                                ?: throw ParameterNotExistException(
+                                    "Parameter(name='userName@domain') does not exist."
+                                )
                             )
-                        )
                     if (userParameter.toLongOrNull() != null) {
                         return@get call.respond(userApiService.findById(userParameter.toLong()))
                     } else {
@@ -72,19 +72,16 @@ fun Route.users(userService: UserService, userApiService: UserApiService) {
                             ?: throw IllegalStateException("no principal")
                         val userParameter = call.parameters["name"]
                             ?: throw ParameterNotExistException("Parameter(name='userName@domain') does not exist.")
-                        if (userParameter.toLongOrNull() != null) {
-                            if (userService.followRequest(userParameter.toLong(), userId)) {
-                                return@post call.respond(HttpStatusCode.OK)
+                        if (if (userParameter.toLongOrNull() != null) {
+                                userApiService.follow(userParameter.toLong(), userId)
                             } else {
-                                return@post call.respond(HttpStatusCode.Accepted)
+                                val parse = AcctUtil.parse(userParameter)
+                                userApiService.follow(parse, userId)
                             }
-                        }
-                        val acct = AcctUtil.parse(userParameter)
-                        val targetUser = userApiService.findByAcct(acct)
-                        if (userService.followRequest(targetUser.id.toLong(), userId)) {
-                            return@post call.respond(HttpStatusCode.OK)
+                        ) {
+                            call.respond(HttpStatusCode.OK)
                         } else {
-                            return@post call.respond(HttpStatusCode.Accepted)
+                            call.respond(HttpStatusCode.Accepted)
                         }
                     }
                 }
@@ -92,11 +89,11 @@ fun Route.users(userService: UserService, userApiService: UserApiService) {
             route("/following") {
                 get {
                     val userParameter = (
-                        call.parameters["name"]
-                            ?: throw ParameterNotExistException(
-                                "Parameter(name='userName@domain') does not exist."
+                            call.parameters["name"]
+                                ?: throw ParameterNotExistException(
+                                    "Parameter(name='userName@domain') does not exist."
+                                )
                             )
-                        )
                     if (userParameter.toLongOrNull() != null) {
                         return@get call.respond(userApiService.findFollowings(userParameter.toLong()))
                     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/ap/APAcceptService.kt b/src/main/kotlin/dev/usbharu/hideout/service/ap/APAcceptService.kt
index b1fbc9b2..3af3fbcb 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/ap/APAcceptService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/ap/APAcceptService.kt
@@ -5,7 +5,9 @@ import dev.usbharu.hideout.domain.model.ActivityPubStringResponse
 import dev.usbharu.hideout.domain.model.ap.Accept
 import dev.usbharu.hideout.domain.model.ap.Follow
 import dev.usbharu.hideout.exception.ap.IllegalActivityPubObjectException
+import dev.usbharu.hideout.query.FollowerQueryService
 import dev.usbharu.hideout.query.UserQueryService
+import dev.usbharu.hideout.service.core.Transaction
 import dev.usbharu.hideout.service.user.UserService
 import io.ktor.http.*
 import org.koin.core.annotation.Single
@@ -17,20 +19,27 @@ interface APAcceptService {
 @Single
 class APAcceptServiceImpl(
     private val userService: UserService,
-    private val userQueryService: UserQueryService
+    private val userQueryService: UserQueryService,
+    private val followerQueryService: FollowerQueryService,
+    private val transaction: Transaction
 ) : APAcceptService {
     override suspend fun receiveAccept(accept: Accept): ActivityPubResponse {
-        val value = accept.`object` ?: throw IllegalActivityPubObjectException("object is null")
-        if (value.type.contains("Follow").not()) {
-            throw IllegalActivityPubObjectException("Invalid type ${value.type}")
-        }
+        return transaction.transaction {
+            val value = accept.`object` ?: throw IllegalActivityPubObjectException("object is null")
+            if (value.type.contains("Follow").not()) {
+                throw IllegalActivityPubObjectException("Invalid type ${value.type}")
+            }
 
-        val follow = value as Follow
-        val userUrl = follow.`object` ?: throw IllegalActivityPubObjectException("object is null")
-        val followerUrl = follow.actor ?: throw IllegalActivityPubObjectException("actor is null")
-        val user = userQueryService.findByUrl(userUrl)
-        val follower = userQueryService.findByUrl(followerUrl)
-        userService.follow(user.id, follower.id)
-        return ActivityPubStringResponse(HttpStatusCode.OK, "accepted")
+            val follow = value as Follow
+            val userUrl = follow.`object` ?: throw IllegalActivityPubObjectException("object is null")
+            val followerUrl = follow.actor ?: throw IllegalActivityPubObjectException("actor is null")
+            val user = userQueryService.findByUrl(userUrl)
+            val follower = userQueryService.findByUrl(followerUrl)
+            if (followerQueryService.alreadyFollow(user.id, follower.id)) {
+                return@transaction ActivityPubStringResponse(HttpStatusCode.OK, "accepted")
+            }
+            userService.follow(user.id, follower.id)
+            ActivityPubStringResponse(HttpStatusCode.OK, "accepted")
+        }
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/ap/APNoteService.kt b/src/main/kotlin/dev/usbharu/hideout/service/ap/APNoteService.kt
index a0b76dcb..77d06bb5 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/ap/APNoteService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/ap/APNoteService.kt
@@ -7,6 +7,7 @@ import dev.usbharu.hideout.domain.model.ap.Note
 import dev.usbharu.hideout.domain.model.hideout.entity.Post
 import dev.usbharu.hideout.domain.model.hideout.entity.Visibility
 import dev.usbharu.hideout.domain.model.job.DeliverPostJob
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.exception.ap.IllegalActivityPubObjectException
 import dev.usbharu.hideout.plugins.getAp
 import dev.usbharu.hideout.plugins.postAp
@@ -83,11 +84,10 @@ class APNoteServiceImpl(
     }
 
     override suspend fun fetchNote(url: String, targetActor: String?): Note {
-        val post = postQueryService.findByUrl(url)
         try {
+            val post = postQueryService.findByUrl(url)
             return postToNote(post)
-        } catch (_: NoSuchElementException) {
-        } catch (_: IllegalArgumentException) {
+        } catch (_: FailedToGetResourcesException) {
         }
 
         val response = httpClient.getAp(
@@ -125,21 +125,18 @@ class APNoteServiceImpl(
 
         val findByApId = try {
             postQueryService.findByApId(note.id!!)
-        } catch (_: NoSuchElementException) {
-            return internalNote(note, targetActor, url)
-        } catch (_: IllegalArgumentException) {
+        } catch (_: FailedToGetResourcesException) {
             return internalNote(note, targetActor, url)
         }
         return postToNote(findByApId)
     }
 
     private suspend fun internalNote(note: Note, targetActor: String?, url: String): Note {
-        val person = apUserService.fetchPerson(
+        val person = apUserService.fetchPersonWithEntity(
             note.attributedTo ?: throw IllegalActivityPubObjectException("note.attributedTo is null"),
             targetActor
         )
-        val user =
-            userQueryService.findByUrl(person.url ?: throw IllegalActivityPubObjectException("person.url is null"))
+
 
         val visibility =
             if (note.to.contains(public) && note.cc.contains(public)) {
@@ -160,7 +157,7 @@ class APNoteServiceImpl(
         postRepository.save(
             Post(
                 id = postRepository.generateId(),
-                userId = user.id,
+                userId = person.second.id,
                 overview = null,
                 text = note.content.orEmpty(),
                 createdAt = Instant.parse(note.published).toEpochMilli(),
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt b/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
index caf9f91b..2f095a6a 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/ap/APUserService.kt
@@ -6,6 +6,8 @@ import dev.usbharu.hideout.domain.model.ap.Image
 import dev.usbharu.hideout.domain.model.ap.Key
 import dev.usbharu.hideout.domain.model.ap.Person
 import dev.usbharu.hideout.domain.model.hideout.dto.RemoteUserCreateDto
+import dev.usbharu.hideout.domain.model.hideout.entity.User
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.exception.ap.IllegalActivityPubObjectException
 import dev.usbharu.hideout.plugins.getAp
 import dev.usbharu.hideout.query.UserQueryService
@@ -29,6 +31,8 @@ interface APUserService {
      * @return
      */
     suspend fun fetchPerson(url: String, targetActor: String? = null): Person
+
+    suspend fun fetchPersonWithEntity(url: String, targetActor: String? = null): Pair<Person, User>
 }
 
 @Single
@@ -67,11 +71,15 @@ class APUserServiceImpl(
                 id = "$userUrl#pubkey",
                 owner = userUrl,
                 publicKeyPem = userEntity.publicKey
-            )
+            ),
+            endpoints = mapOf("sharedInbox" to "${Config.configData.url}/inbox")
         )
     }
 
-    override suspend fun fetchPerson(url: String, targetActor: String?): Person {
+    override suspend fun fetchPerson(url: String, targetActor: String?): Person =
+        fetchPersonWithEntity(url, targetActor).first
+
+    override suspend fun fetchPersonWithEntity(url: String, targetActor: String?): Pair<Person, User> {
         return try {
             val userEntity = userQueryService.findByUrl(url)
             return Person(
@@ -95,9 +103,10 @@ class APUserServiceImpl(
                     id = "$url#pubkey",
                     owner = url,
                     publicKeyPem = userEntity.publicKey
-                )
-            )
-        } catch (ignore: NoSuchElementException) {
+                ),
+                endpoints = mapOf("sharedInbox" to "${Config.configData.url}/inbox")
+            ) to userEntity
+        } catch (ignore: FailedToGetResourcesException) {
             val httpResponse = if (targetActor != null) {
                 httpClient.getAp(url, "$targetActor#pubkey")
             } else {
@@ -107,7 +116,7 @@ class APUserServiceImpl(
             }
             val person = Config.configData.objectMapper.readValue<Person>(httpResponse.bodyAsText())
 
-            userService.createRemoteUser(
+            person to userService.createRemoteUser(
                 RemoteUserCreateDto(
                     name = person.preferredUsername
                         ?: throw IllegalActivityPubObjectException("preferredUsername is null"),
@@ -122,7 +131,6 @@ class APUserServiceImpl(
                         ?: throw IllegalActivityPubObjectException("publicKey is null"),
                 )
             )
-            person
         }
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/UserApiService.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/UserApiService.kt
index fb8ce555..4cdf8ac7 100644
--- a/src/main/kotlin/dev/usbharu/hideout/service/api/UserApiService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/UserApiService.kt
@@ -30,6 +30,9 @@ interface UserApiService {
     suspend fun findFollowingsByAcct(acct: Acct): List<UserResponse>
 
     suspend fun createUser(username: String, password: String): UserResponse
+
+    suspend fun follow(targetId: Long, sourceId: Long): Boolean
+    suspend fun follow(targetAcct: Acct, sourceId: Long): Boolean
 }
 
 @Single
@@ -39,30 +42,50 @@ class UserApiServiceImpl(
     private val userService: UserService,
     private val transaction: Transaction
 ) : UserApiService {
-    override suspend fun findAll(limit: Int?, offset: Long): List<UserResponse> =
+    override suspend fun findAll(limit: Int?, offset: Long): List<UserResponse> = transaction.transaction {
         userQueryService.findAll(min(limit ?: 100, 100), offset).map { UserResponse.from(it) }
+    }
 
-    override suspend fun findById(id: Long): UserResponse = UserResponse.from(userQueryService.findById(id))
 
-    override suspend fun findByIds(ids: List<Long>): List<UserResponse> =
-        userQueryService.findByIds(ids).map { UserResponse.from(it) }
+    override suspend fun findById(id: Long): UserResponse =
+        transaction.transaction { UserResponse.from(userQueryService.findById(id)) }
 
-    override suspend fun findByAcct(acct: Acct): UserResponse =
-        UserResponse.from(userQueryService.findByNameAndDomain(acct.username, acct.domain ?: Config.configData.domain))
+    override suspend fun findByIds(ids: List<Long>): List<UserResponse> {
+        return transaction.transaction {
+            userQueryService.findByIds(ids).map { UserResponse.from(it) }
+        }
+    }
 
-    override suspend fun findFollowers(userId: Long): List<UserResponse> =
+    override suspend fun findByAcct(acct: Acct): UserResponse {
+        return transaction.transaction {
+            UserResponse.from(
+                userQueryService.findByNameAndDomain(
+                    acct.username,
+                    acct.domain ?: Config.configData.domain
+                )
+            )
+        }
+    }
+
+    override suspend fun findFollowers(userId: Long): List<UserResponse> = transaction.transaction {
         followerQueryService.findFollowersById(userId).map { UserResponse.from(it) }
+    }
 
-    override suspend fun findFollowings(userId: Long): List<UserResponse> =
+
+    override suspend fun findFollowings(userId: Long): List<UserResponse> = transaction.transaction {
         followerQueryService.findFollowingById(userId).map { UserResponse.from(it) }
+    }
 
-    override suspend fun findFollowersByAcct(acct: Acct): List<UserResponse> =
+    override suspend fun findFollowersByAcct(acct: Acct): List<UserResponse> = transaction.transaction {
         followerQueryService.findFollowersByNameAndDomain(acct.username, acct.domain ?: Config.configData.domain)
             .map { UserResponse.from(it) }
+    }
 
-    override suspend fun findFollowingsByAcct(acct: Acct): List<UserResponse> =
+    override suspend fun findFollowingsByAcct(acct: Acct): List<UserResponse> = transaction.transaction {
         followerQueryService.findFollowingByNameAndDomain(acct.username, acct.domain ?: Config.configData.domain)
             .map { UserResponse.from(it) }
+    }
+
 
     override suspend fun createUser(username: String, password: String): UserResponse {
         return transaction.transaction {
@@ -72,4 +95,21 @@ class UserApiServiceImpl(
             UserResponse.from(userService.createLocalUser(UserCreateDto(username, username, "", password)))
         }
     }
+
+    override suspend fun follow(targetId: Long, sourceId: Long): Boolean {
+        return transaction.transaction {
+            userService.followRequest(targetId, sourceId)
+        }
+    }
+
+    override suspend fun follow(targetAcct: Acct, sourceId: Long): Boolean {
+        return transaction.transaction {
+            userService.followRequest(
+                userQueryService.findByNameAndDomain(
+                    targetAcct.username,
+                    targetAcct.domain ?: Config.configData.domain
+                ).id, sourceId
+            )
+        }
+    }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/util/CollectionUtil.kt b/src/main/kotlin/dev/usbharu/hideout/util/CollectionUtil.kt
new file mode 100644
index 00000000..6f418646
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/util/CollectionUtil.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.util
+
+class CollectionUtil {
+}
+
+fun <T> Iterable<T>.singleOr(block: (e: RuntimeException) -> Throwable): T {
+    return try {
+        this.single()
+    } catch (e: NoSuchElementException) {
+        throw block(e)
+    } catch (e: IllegalArgumentException) {
+        throw block(e)
+    }
+}
diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml
index 9129b1b2..ad457f2b 100644
--- a/src/main/resources/logback.xml
+++ b/src/main/resources/logback.xml
@@ -4,7 +4,7 @@
             <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
         </encoder>
     </appender>
-    <root level="INFO">
+    <root level="TRACE">
         <appender-ref ref="STDOUT"/>
     </root>
     <logger name="org.eclipse.jetty" level="INFO"/>