diff --git a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepository.kt b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepository.kt
index ac96db6b..7dca9785 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepository.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepository.kt
@@ -42,4 +42,12 @@ interface RelationshipRepository {
         followRequest: Boolean,
         ignoreFollowRequest: Boolean
     ): List<Relationship>
+
+    suspend fun findByActorIdAntMutingAndMaxIdAndSinceId(
+        actorId: Long,
+        muting: Boolean,
+        maxId: Long?,
+        sinceId: Long?,
+        limit: Int
+    ): List<Relationship>
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepositoryImpl.kt
index 9cea8aaa..6aa2fd70 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepositoryImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/domain/model/relationship/RelationshipRepositoryImpl.kt
@@ -97,6 +97,28 @@ class RelationshipRepositoryImpl : RelationshipRepository, AbstractRepository()
         return@query query.map { it.toRelationships() }
     }
 
+    override suspend fun findByActorIdAntMutingAndMaxIdAndSinceId(
+        actorId: Long,
+        muting: Boolean,
+        maxId: Long?,
+        sinceId: Long?,
+        limit: Int
+    ): List<Relationship> = query {
+        val query = Relationships.select {
+            Relationships.actorId.eq(actorId).and(Relationships.muting.eq(muting))
+        }.limit(limit)
+
+        if (maxId != null) {
+            query.andWhere { Relationships.id lessEq maxId }
+        }
+
+        if (sinceId != null) {
+            query.andWhere { Relationships.id greaterEq sinceId }
+        }
+
+        return@query query.map { it.toRelationships() }
+    }
+
     companion object {
         private val logger = LoggerFactory.getLogger(RelationshipRepositoryImpl::class.java)
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/account/MastodonAccountApiController.kt b/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/account/MastodonAccountApiController.kt
index e8e65008..d2066b68 100644
--- a/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/account/MastodonAccountApiController.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/mastodon/interfaces/api/account/MastodonAccountApiController.kt
@@ -186,4 +186,36 @@ class MastodonAccountApiController(
                     .asFlow()
             ResponseEntity.ok(accountFlow)
         }
+
+    override suspend fun apiV1AccountsIdMutePost(id: String): ResponseEntity<Relationship> {
+        val principal = SecurityContextHolder.getContext().getAuthentication().principal as Jwt
+
+        val userid = principal.getClaim<String>("uid").toLong()
+
+        val mute = accountApiService.mute(userid, id.toLong())
+
+        return ResponseEntity.ok(mute)
+    }
+
+    override suspend fun apiV1AccountsIdUnmutePost(id: String): ResponseEntity<Relationship> {
+        val principal = SecurityContextHolder.getContext().getAuthentication().principal as Jwt
+
+        val userid = principal.getClaim<String>("uid").toLong()
+
+        val unmute = accountApiService.unmute(userid, id.toLong())
+
+        return ResponseEntity.ok(unmute)
+    }
+
+    override fun apiV1MutesGet(maxId: String?, sinceId: String?, limit: Int?): ResponseEntity<Flow<Account>> =
+        runBlocking {
+            val principal = SecurityContextHolder.getContext().getAuthentication().principal as Jwt
+
+            val userid = principal.getClaim<String>("uid").toLong()
+
+            val unmute =
+                accountApiService.mutesAccount(userid, maxId?.toLong(), sinceId?.toLong(), limit ?: 20).asFlow()
+
+            return@runBlocking ResponseEntity.ok(unmute)
+        }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/mastodon/service/account/AccountApiService.kt b/src/main/kotlin/dev/usbharu/hideout/mastodon/service/account/AccountApiService.kt
index 0cefb38c..a69e0474 100644
--- a/src/main/kotlin/dev/usbharu/hideout/mastodon/service/account/AccountApiService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/mastodon/service/account/AccountApiService.kt
@@ -60,6 +60,9 @@ interface AccountApiService {
 
     suspend fun acceptFollowRequest(loginUser: Long, target: Long): Relationship
     suspend fun rejectFollowRequest(loginUser: Long, target: Long): Relationship
+    suspend fun mute(userid: Long, target: Long): Relationship
+    suspend fun unmute(userid: Long, target: Long): Relationship
+    suspend fun mutesAccount(userid: Long, maxId: Long?, sinceId: Long?, limit: Int): List<Account>
 }
 
 @Service
@@ -245,6 +248,25 @@ class AccountApiServiceImpl(
         return@transaction fetchRelationship(loginUser, target)
     }
 
+    override suspend fun mute(userid: Long, target: Long): Relationship = transaction.transaction {
+        relationshipService.mute(userid, target)
+
+        return@transaction fetchRelationship(userid, target)
+    }
+
+    override suspend fun unmute(userid: Long, target: Long): Relationship = transaction.transaction {
+        relationshipService.mute(userid, target)
+
+        return@transaction fetchRelationship(userid, target)
+    }
+
+    override suspend fun mutesAccount(userid: Long, maxId: Long?, sinceId: Long?, limit: Int): List<Account> {
+        val mutedAccounts =
+            relationshipRepository.findByActorIdAntMutingAndMaxIdAndSinceId(userid, true, maxId, sinceId, limit)
+
+        return accountService.findByIds(mutedAccounts.map { it.targetActorId })
+    }
+
     private fun from(account: Account): CredentialAccount {
         return CredentialAccount(
             id = account.id,
diff --git a/src/main/resources/openapi/mastodon.yaml b/src/main/resources/openapi/mastodon.yaml
index 3a6ce32c..829da25c 100644
--- a/src/main/resources/openapi/mastodon.yaml
+++ b/src/main/resources/openapi/mastodon.yaml
@@ -464,6 +464,80 @@ paths:
               schema:
                 $ref: "#/components/schemas/Relationship"
 
+  /api/v1/accounts/{id}/mute:
+    post:
+      tags:
+        - account
+      security:
+        - OAuth2:
+            - "write:mutes"
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Relationship"
+
+  /api/v1/accounts/{id}/unmute:
+    post:
+      tags:
+        - account
+      security:
+        - OAuth2:
+            - "write:mutes"
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Relationship"
+
+  /api/v1/mutes:
+    get:
+      tags:
+        - account
+      security:
+        - OAuth2:
+            - "read:mutes"
+      parameters:
+        - in: query
+          name: max_id
+          required: false
+          schema:
+            type: string
+        - in: query
+          name: since_id
+          required: false
+          schema:
+            type: string
+        - in: query
+          name: limit
+          schema:
+            type: integer
+          required: false
+      responses:
+        200:
+          description: 成功
+          content:
+            application/json:
+              schema:
+                items:
+                  $ref: "#/components/schemas/Account"
+
   /api/v1/accounts/{id}/statuses:
     get:
       tags: