diff --git a/.cspell b/.cspell
index 080c3937b..8b5575fa8 100644
--- a/.cspell
+++ b/.cspell
@@ -9,6 +9,7 @@ authc
 authinfo
 authtoken
 autocut
+autofollow
 backendroles
 backpressure
 beider
@@ -78,6 +79,7 @@ lucene
 Lucene
 lycheeverse
 marvinpinto
+memlock
 metaphone
 mget
 millis
@@ -173,6 +175,7 @@ tokenfilters
 translog
 Translog
 tubone
+ulimits
 unigrams
 Unmanaged
 unmatch
diff --git a/.github/workflows/test-spec.yml b/.github/workflows/test-spec.yml
index 3fa404483..627dd5f52 100644
--- a/.github/workflows/test-spec.yml
+++ b/.github/workflows/test-spec.yml
@@ -73,7 +73,7 @@ jobs:
       - name: Run Tests
         run: |
           npm run test:spec -- \
-            --opensearch-insecure \
+            --opensearch-insecure --verbose\
             --opensearch-version=${{ matrix.entry.version }} \
             --coverage coverage/test-spec-coverage-${{ matrix.entry.version }}-${{ matrix.entry.tests || 'default' }}.json \
             --tests=tests/${{ matrix.entry.tests || 'default' }}
diff --git a/spec/namespaces/replication.yaml b/spec/namespaces/replication.yaml
new file mode 100644
index 000000000..5bb133021
--- /dev/null
+++ b/spec/namespaces/replication.yaml
@@ -0,0 +1,322 @@
+openapi: 3.1.0
+info:
+  title: OpenSearch Replication API
+  description: OpenSearch Replication API
+  version: 1.0.0
+paths:
+  /_plugins/_replication/{index}/_start:
+    put:
+      operationId: replication.start.0
+      x-operation-group: replication.start
+      x-version-added: '1.1'
+      description: Initiate replication of an index from the leader cluster to the follower cluster.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#start-replication
+      parameters:
+        - $ref: '#/components/parameters/replication.start::path.index'
+      requestBody:
+        $ref: '#/components/requestBodies/replication.start'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.start@200'
+  /_plugins/_replication/{index}/_stop:
+    post:
+      operationId: replication.stop.0
+      x-operation-group: replication.stop
+      x-version-added: '1.1'
+      description: Terminates replication and converts the follower index to a standard index.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#stop-replication
+      parameters:
+        - $ref: '#/components/parameters/replication.stop::path.index'
+      requestBody:
+        $ref: '#/components/requestBodies/replication.stop'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.stop@200'
+  /_plugins/_replication/{index}/_pause:
+    post:
+      operationId: replication.pause.0
+      x-operation-group: replication.pause
+      x-version-added: '1.1'
+      description: Pauses replication of the leader index.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#pause-replication
+      parameters:
+        - $ref: '#/components/parameters/replication.pause::path.index'
+      requestBody:
+        $ref: '#/components/requestBodies/replication.pause'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.pause@200'
+  /_plugins/_replication/{index}/_resume:
+    post:
+      operationId: replication.resume.0
+      x-operation-group: replication.resume
+      x-version-added: '1.1'
+      description: Resumes replication of the leader index.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#resume-replication
+      parameters:
+        - $ref: '#/components/parameters/replication.resume::path.index'
+      requestBody:
+        $ref: '#/components/requestBodies/replication.resume'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.resume@200'
+  /_plugins/_replication/{index}/_status:
+    get:
+      operationId: replication.status.0
+      x-operation-group: replication.status
+      x-version-added: '1.1'
+      description: Gets the status of index replication.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#get-replication-status
+      parameters:
+        - $ref: '#/components/parameters/replication.status::path.index'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.status@200'
+  /_plugins/_replication/leader_stats:
+    get:
+      operationId: replication.leader_stats.0
+      x-operation-group: replication.leader_stats
+      x-version-added: '1.1'
+      description: Gets information about replicated leader indexes on a specified cluster.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#get-leader-cluster-stats
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.leader_stats@200'
+  /_plugins/_replication/follower_stats:
+    get:
+      operationId: replication.follower_stats.0
+      x-operation-group: replication.follower_stats
+      x-version-added: '1.1'
+      description: Gets information about follower (syncing) indexes on a specified cluster.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#get-follower-cluster-stats
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.follower_stats@200'
+  /_plugins/_replication/autofollow_stats:
+    get:
+      operationId: replication.autofollow_stats.0
+      x-operation-group: replication.autofollow_stats
+      x-version-added: '1.1'
+      description: Gets information about auto-follow activity and any replication rules configured on the specified cluster.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#get-auto-follow-stats
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.autofollow_stats@200'
+  /_plugins/_replication/{index}/_update:
+    put:
+      operationId: replication.update_settings.0
+      x-operation-group: replication.update_settings
+      x-version-added: '1.1'
+      description: Updates settings on the follower index.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#update-settings
+      parameters:
+        - $ref: '#/components/parameters/replication.update_settings::path.index'
+      requestBody:
+        $ref: '#/components/requestBodies/replication.update_settings'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.update_settings@200'
+  /_plugins/_replication/_autofollow:
+    post:
+      operationId: replication.create_replication_rule.0
+      x-operation-group: replication.create_replication_rule
+      x-version-added: '1.1'
+      description: Automatically starts replication on indexes matching a specified pattern.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#create-replication-rule
+      requestBody:
+        $ref: '#/components/requestBodies/replication.create_replication_rule'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.create_replication_rule@200'
+    delete:
+      operationId: replication.delete_replication_rule.0
+      x-operation-group: replication.delete_replication_rule
+      x-version-added: '1.1'
+      description: Deletes the specified replication rule.
+      externalDocs:
+        url: https://opensearch.org/docs/latest/tuning-your-cluster/replication-plugin/api/#delete-replication-rule
+      requestBody:
+        $ref: '#/components/requestBodies/replication.delete_replication_rule'
+      responses:
+        '200':
+          $ref: '#/components/responses/replication.delete_replication_rule@200'
+components:
+  parameters:
+    replication.start::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+    replication.stop::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+    replication.pause::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+    replication.resume::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+    replication.status::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+    replication.update_settings::path.index:
+      in: path
+      name: index
+      description: Name of the data stream, index, or index alias to perform bulk actions on.
+      required: true
+      schema:
+        $ref: '../schemas/_common.yaml#/components/schemas/IndexName'
+      style: simple
+  requestBodies:
+    replication.start:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/Replication'
+      required: true
+    replication.stop:
+      content:
+        application/json:
+          schema:
+            type: object
+      required: true
+    replication.pause:
+      content:
+        application/json:
+          schema:
+            type: object
+      required: true
+    replication.resume:
+      content:
+        application/json:
+          schema:
+            type: object
+      required: true
+    replication.update_settings:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/UpdateSettings'
+      required: true
+    replication.create_replication_rule:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/CreateReplicationRule'
+      required: true
+    replication.delete_replication_rule:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/DeleteReplicationRule'
+      required: true
+  responses:
+    replication.start@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.stop@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.pause@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.resume@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.status@200:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/Status'
+    replication.leader_stats@200:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/LeaderStatus'
+    replication.follower_stats@200:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/FollowerStatus'
+    replication.autofollow_stats@200:
+      content:
+        application/json:
+          schema:
+            $ref: '../schemas/replication._common.yaml#/components/schemas/AutoFollowStatus'
+    replication.update_settings@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.create_replication_rule@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
+    replication.delete_replication_rule@200:
+      content:
+        application/json:
+          schema:
+            type: object
+            properties:
+              acknowledged:
+                type: boolean
\ No newline at end of file
diff --git a/spec/schemas/replication._common.yaml b/spec/schemas/replication._common.yaml
new file mode 100644
index 000000000..bdd11c3f3
--- /dev/null
+++ b/spec/schemas/replication._common.yaml
@@ -0,0 +1,222 @@
+openapi: 3.1.0
+info:
+  title: Schemas of replication._common category.
+  description: Schemas of replication._common category.
+  version: 1.0.0
+paths: {}
+components:
+  schemas:
+    Replication:
+      type: object
+      properties:
+        leader_alias:
+          type: string
+        leader_index:
+          type: string
+        use_roles:
+          $ref: '#/components/schemas/UseRoles'
+    UseRoles:
+      type: object
+      properties:
+        leader_cluster_role:
+          type: string
+        follower_cluster_role:
+          type: string
+    Status:
+      type: object
+      properties:
+        status:
+          type: string
+        reason:
+          type: string
+        leader_alias:
+          type: string
+        leader_index:
+          type: string
+        follower_index:
+          type: string
+        syncing_details:
+          $ref: '#/components/schemas/SyncingDetails'
+    SyncingDetails:
+      type: object
+      properties:
+        leader_checkpoint:
+          type: integer
+        follower_checkpoint:
+          type: integer
+        seq_no:
+          type: integer
+    LeaderStatus:
+      type: object
+      properties:
+        num_replicated_indices:
+          type: number
+        operations_read:
+          type: number
+        translog_size_bytes:
+          type: number
+        operations_read_lucene:
+          type: number
+        operations_read_translog:
+          type: number
+        total_read_time_lucene_millis:
+          type: number
+        total_read_time_translog_millis:
+          type: number
+        bytes_read:
+          type: number
+        index_stats:
+          type: object
+          additionalProperties:
+            $ref: '#/components/schemas/IndexStatus'
+    IndexStatus:
+      type: object
+      properties:
+        operations_read:
+          type: number
+        translog_size_bytes:
+          type: number
+        operations_read_lucene:
+          type: number
+        operations_read_translog:
+          type: number
+        total_read_time_lucene_millis:
+          type: number
+        total_read_time_translog_millis:
+          type: number
+        bytes_read:
+          type: number
+    FollowerStatus:
+      type: object
+      properties:
+        num_syncing_indices:
+          type: number
+        num_bootstrapping_indices:
+          type: number
+        num_paused_indices:
+          type: number
+        num_failed_indices:
+          type: number
+        num_shard_tasks:
+          type: number
+        num_index_tasks:
+          type: number
+        operations_written:
+          type: number
+        operations_read:
+          type: number
+        failed_read_requests:
+          type: number
+        throttled_read_requests:
+          type: number
+        failed_write_requests:
+          type: number
+        throttled_write_requests:
+          type: number
+        follower_checkpoint:
+          type: number
+        leader_checkpoint:
+          type: number
+        total_write_time_millis:
+          type: number
+        index_stats:
+          type: object
+          additionalProperties:
+            $ref: '#/components/schemas/IndexFollowerStatus'
+    IndexFollowerStatus:
+      type: object
+      properties:
+        operations_written:
+          type: number
+        operations_read:
+          type: number
+        failed_read_requests:
+          type: number
+        throttled_read_requests:
+          type: number
+        failed_write_requests:
+          type: number
+        throttled_write_requests:
+          type: number
+        follower_checkpoint:
+          type: number
+        leader_checkpoint:
+          type: number
+        total_write_time_millis:
+          type: number
+    AutoFollowStatus:
+      type: object
+      properties:
+        num_success_start_replication:
+          type: number
+        num_failed_start_replication:
+          type: number
+        num_failed_leader_calls:
+          type: number
+        failed_indices:
+          type: array
+          items:
+            type: string
+        autofollow_stats:
+          type: array
+          items:
+            $ref: '#/components/schemas/AutoFollowStats'
+    AutoFollowStats:
+      type: object
+      properties:
+        name:
+          type: string
+        pattern:
+          type: string
+        num_success_start_replication:
+          type: number
+        num_failed_start_replication:
+          type: number
+        num_failed_leader_calls:
+          type: number
+        failed_indices:
+          type: array
+          items:
+            type: string
+    SettingsBody:
+      type: object
+      properties:
+        index:
+          $ref: '#/components/schemas/IndexSchema'
+    UpdateSettings:
+      type: object
+      properties:
+        settings:
+          anyOf:
+            - type: object
+              properties:
+                index.number_of_shards:
+                  type: integer
+                index.number_of_replicas:
+                  type: integer
+            - $ref: '#/components/schemas/SettingsBody'
+    IndexSchema:
+      type: object
+      properties:
+        number_of_shards:
+          type: integer
+        number_of_replicas:
+          type: integer
+    CreateReplicationRule:
+      type: object
+      properties:
+        leader_alias:
+          type: string
+        name:
+          type: string
+        pattern:
+          type: string
+        use_roles:
+          $ref: '#/components/schemas/UseRoles'
+    DeleteReplicationRule:
+      type: object
+      properties:
+        leader_alias:
+          type: string
+        name:
+          type: string
\ No newline at end of file
diff --git a/tests/replication/replica.yaml b/tests/replication/replica.yaml
new file mode 100644
index 000000000..c32e141f4
--- /dev/null
+++ b/tests/replication/replica.yaml
@@ -0,0 +1,128 @@
+$schema: ../../json_schemas/test_story.schema.yaml
+
+description: Test to explicitly clear the cursor context
+
+prologues:
+  - path: /{index}
+    method: PUT
+    parameters:
+      index: books
+    request_body:
+      payload: {}
+  - path: /_bulk
+    method: POST
+    request_body:
+      content_type: application/x-ndjson
+      payload:
+        - {create: {_index: books, _id: book_1392214}}
+        - {author: Harper Lee, title: To Kill a Mockingbird, year: 1960}
+        - {create: {_index: books, _id: book_1392215}}
+        - {author: Elizabeth Rudnick, title: Beauty and the Beast, year: 1991}
+  - path: /{index}/_refresh
+    method: POST
+    parameters:
+      index: books
+epilogues:
+  - path: /_plugins/_replication/{index}/_stop
+    method: POST
+    parameters: 
+      index: books-names
+    request_body:
+      payload: {}
+  - path: /books-names
+    method: DELETE
+    status: [200, 404]
+  - path: /books
+    method: DELETE
+    status: [200, 404]
+chapters:
+  - synopsis: Establish connection.
+    path: /_cluster/settings
+    method: PUT
+    request_body:
+      payload:
+        persistent:
+          cluster:
+            remote:
+              my-connection-alias:
+                seeds: ['172.18.0.3:9300']
+    response:
+      status: 200
+  - synopsis: Start replication.
+    path: /_plugins/_replication/{index}/_start
+    version: '>= 1.1'
+    method: PUT
+    parameters:
+      index: books-names
+    request_body:
+      payload:
+        leader_alias: my-connection-alias
+        leader_index: books
+        use_roles: 
+          leader_cluster_role: leader_role
+          follower_cluster_role: follower_role
+    response:
+      status: 200
+  - synopsis: Get replication stats.
+    path: /_plugins/_replication/{index}/_status
+    version: '>= 1.1'
+    method: GET
+    parameters:
+      index: books-names
+    response:
+      status: 200
+  - synopsis: Get leader stats.
+    path: /_plugins/_replication/leader_stats
+    version: '>= 1.1'
+    method: GET
+    response:
+      status: 200
+  - synopsis: Get follower stats.
+    path: /_plugins/_replication/follower_stats
+    version: '>= 1.1'
+    method: GET
+    response:
+      status: 200
+  - synopsis: Get auto-follow stats.
+    path: /_plugins/_replication/autofollow_stats
+    version: '>= 1.1'
+    method: GET
+    response:
+      status: 200
+  - synopsis: Update settings.
+    path: /_plugins/_replication/{index}/_update
+    version: '>= 1.1'
+    method: PUT
+    parameters:
+      index: books-names
+    request_body:
+      payload:
+        settings: 
+          index.number_of_shards: 4
+          index.number_of_replicas: 2
+    response:
+      status: 200
+  - synopsis: Create replication rule.
+    path: /_plugins/_replication/_autofollow
+    version: '>= 1.1'
+    method: POST
+    request_body:
+      payload:
+        leader_alias: my-connection-alias
+        name: books
+        pattern: 'books-*'
+        use_roles:
+          leader_cluster_role: leader_role
+          follower_cluster_role: follower_role
+    response:
+      status: 200
+  - synopsis: Delete replication rule.
+    path: /_plugins/_replication/_autofollow
+    version: '>= 1.1'
+    method: DELETE
+    request_body:
+      payload:
+        leader_alias: my-connection-alias
+        name: books
+    response:
+      status: 200
\ No newline at end of file
diff --git a/tests/snapshot/docker-compose.yml b/tests/snapshot/docker-compose.yml
index 86cb0b9b3..f908c89e5 100644
--- a/tests/snapshot/docker-compose.yml
+++ b/tests/snapshot/docker-compose.yml
@@ -1,8 +1,23 @@
 version: '3'
 
 services:
-  opensearch-cluster:
+  opensearch-node1:
     image: ${OPENSEARCH_DOCKER_HUB_PROJECT:-opensearchproject}/opensearch:${OPENSEARCH_VERSION:-latest}${OPENSEARCH_DOCKER_REF}
+    container_name: opensearch-node1
+    environment:
+      - 'OPENSEARCH_INITIAL_ADMIN_PASSWORD=${OPENSEARCH_PASSWORD:-myStrongPassword123!}'
+      - OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m
+      - bootstrap.memory_lock=true
+      - cluster.initial_master_nodes=opensearch-node1,opensearch-node2
+      - cluster.name=opensearch-cluster
+      - discovery.seed_hosts=opensearch-node1,opensearch-node2
+      - node.name=opensearch-node1
+      - path.repo=/tmp/opensearch/repo
+      - plugins.index_state_management.job_interval=1
+    ulimits:
+      memlock:
+        soft: -1
+        hard: -1
     ports:
       - 9200:9200
       - 9600:9600
@@ -11,3 +26,4 @@ services:
       - OPENSEARCH_JAVA_OPTS=${OPENSEARCH_JAVA_OPTS}
       - discovery.type=single-node
       - path.repo=/tmp/opensearch/repo
+