> ## Documentation Index > Fetch the complete documentation index at: https://gcore.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create load balancer listener ## OpenAPI ````yaml /api-reference/services_documented/cloud_api.yaml post /cloud/v1/lblisteners/{project_id}/{region_id} openapi: 3.1.0 info: title: Gcore OpenAPI – Cloud API description: >- This OpenAPI is an aggregated OpenAPI specification that unifies all Gcore products into a single file. It covers Cloud, CDN, DNS, WAAP, DDoS Protection, Object Storage, Streaming, and FastEdge services. version: '2026-05-14T07:00:22.640261+00:00' servers: - url: https://api.gcore.com security: - APIKey: [] tags: - name: Bare Metal x-displayName: Bare Metal - name: Container as a Service x-displayName: Container as a Service - name: Cost Reports x-displayName: Cost Reports - name: DDoS Protection x-displayName: DDoS Protection - name: Everywhere Inference x-displayName: Everywhere Inference - name: Everywhere Inference Apps x-displayName: Everywhere Inference Apps - name: File Shares x-displayName: File Shares - name: Floating IPs x-displayName: Floating IPs - name: Function as a Service x-displayName: Function as a Service - name: GPU Bare Metal x-displayName: GPU Bare Metal - name: GPU Virtual x-displayName: GPU Virtual - name: IP Ranges x-displayName: IP Ranges - name: Images x-displayName: Images - name: Instances x-displayName: Instances - name: Load Balancers x-displayName: Load Balancers - name: Logging x-displayName: Logging - name: Managed Kubernetes x-displayName: Managed Kubernetes - name: Managed PostgreSQL x-displayName: Managed PostgreSQL - name: Networks x-displayName: Networks - name: Placement Groups x-displayName: Placement Groups - name: Projects x-displayName: Projects - name: Quotas x-displayName: Quotas - name: Regions x-displayName: Regions - name: Registry x-displayName: Registry - name: Reservations x-displayName: Reservations - name: Reserved IPs x-displayName: Reserved IPs - name: Routers x-displayName: Routers - name: SSH Keys x-displayName: SSH Keys - name: Secrets x-displayName: Secrets - name: Security Groups x-displayName: Security Groups - name: Snapshot Schedules x-displayName: Snapshot Schedules - name: Snapshots x-displayName: Snapshots - name: Tasks x-displayName: Tasks - name: User Actions x-displayName: User Actions - name: User Role Assignments x-displayName: User Role Assignments - name: Volumes x-displayName: Volumes paths: /cloud/v1/lblisteners/{project_id}/{region_id}: post: tags: - Load Balancers summary: Create load balancer listener operationId: LoadBalancerListenerViewSet.post parameters: - in: path name: project_id required: true description: Project ID schema: description: Project ID example: 1 examples: - 1 title: Project Id type: integer - in: path name: region_id required: true description: Region ID schema: description: Region ID example: 1 examples: - 1 exclusiveMinimum: 0 title: Region Id type: integer requestBody: content: application/json: schema: $ref: '#/components/schemas/CreateLbListenerSerializer' responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/TaskIDsSerializer' x-codeSamples: - lang: Python source: |- import os from gcore import Gcore client = Gcore( api_key=os.environ.get("GCORE_API_KEY"), # This is the default and can be omitted ) task_id_list = client.cloud.load_balancers.listeners.create( project_id=1, region_id=1, load_balancer_id="30f4f55b-4a7c-48e0-9954-5cddfee216e7", name="my_listener", protocol="HTTP", protocol_port=80, ) print(task_id_list.tasks) - lang: Go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/G-Core/gcore-go\"\n\t\"github.com/G-Core/gcore-go/cloud\"\n\t\"github.com/G-Core/gcore-go/option\"\n)\n\nfunc main() {\n\tclient := gcore.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\ttaskIDList, err := client.Cloud.LoadBalancers.Listeners.New(context.TODO(), cloud.LoadBalancerListenerNewParams{\n\t\tProjectID: gcore.Int(1),\n\t\tRegionID: gcore.Int(1),\n\t\tLoadBalancerID: \"30f4f55b-4a7c-48e0-9954-5cddfee216e7\",\n\t\tName: \"my_listener\",\n\t\tProtocol: cloud.LbListenerProtocolHTTP,\n\t\tProtocolPort: 80,\n\t})\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", taskIDList.Tasks)\n}\n" components: schemas: CreateLbListenerSerializer: properties: allowed_cidrs: anyOf: - items: format: ipvanynetwork type: string maxItems: 100 type: array - type: 'null' description: Network CIDRs from which service will be accessible examples: - - 10.0.0.0/8 title: Allowed Cidrs connection_limit: default: 100000 description: >- Limit of the simultaneous connections. If -1 is provided, it is translated to the default value 100000. example: 100000 examples: - 100000 maximum: 1000000 minimum: -1 title: Connection Limit type: integer default_pool_id: description: ID of already existent Load Balancer Pool to attach listener to. example: 00000000-0000-4000-8000-000000000000 examples: - 00000000-0000-4000-8000-000000000000 format: uuid4 title: Default Pool Id type: string insert_x_forwarded: description: >- Add headers X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto to requests. Only used with HTTP or `TERMINATED_HTTPS` protocols. example: false examples: - false title: Insert X Forwarded type: boolean load_balancer_id: description: ID of already existent Load Balancer. example: 30f4f55b-4a7c-48e0-9954-5cddfee216e7 examples: - 30f4f55b-4a7c-48e0-9954-5cddfee216e7 format: uuid4 title: Load Balancer Id type: string name: description: Load balancer listener name example: my_listener examples: - my_listener pattern: ^[a-zA-Z0-9][a-zA-Z 0-9._\-]{1,61}[a-zA-Z0-9._]$ title: Name type: string protocol: $ref: '#/components/schemas/LbListenerProtocolEnum' description: Load balancer listener protocol examples: - HTTP protocol_port: description: Protocol port example: 80 examples: - 80 maximum: 65535 minimum: 1 title: Protocol Port type: integer secret_id: anyOf: - const: '' type: string - format: uuid4 type: string description: >- ID of the secret where PKCS12 file is stored for `TERMINATED_HTTPS` or PROMETHEUS listener examples: - f2e734d0-fa2b-42c2-ad33-4c6db5101e00 title: Secret Id sni_secret_id: description: >- List of secrets IDs containing PKCS12 format certificate/key bundles for `TERMINATED_HTTPS` or PROMETHEUS listeners example: - f2e734d0-fa2b-42c2-ad33-4c6db5101e00 - eb121225-7ded-4ff3-ae1f-599e145dd7cb examples: - - f2e734d0-fa2b-42c2-ad33-4c6db5101e00 - eb121225-7ded-4ff3-ae1f-599e145dd7cb items: format: uuid4 type: string title: Sni Secret Id type: array timeout_client_data: anyOf: - maximum: 86400000 minimum: 0 type: integer - type: 'null' description: Frontend client inactivity timeout in milliseconds examples: - 50000 title: Timeout Client Data timeout_member_connect: anyOf: - maximum: 86400000 minimum: 0 type: integer - type: 'null' deprecated: true description: >- Backend member connection timeout in milliseconds. We are recommending to use `pool.timeout_member_connect` instead. examples: - 50000 title: Timeout Member Connect timeout_member_data: anyOf: - maximum: 86400000 minimum: 0 type: integer - type: 'null' deprecated: true description: >- Backend member inactivity timeout in milliseconds. We are recommending to use `pool.timeout_member_data` instead. examples: - null title: Timeout Member Data user_list: description: Load balancer listener list of username and encrypted password items example: - encrypted_password: $5$isRr.HJ1IrQP38.m$oViu3DJOpUG2ZsjCBtbITV3mqpxxbZfyWJojLPNSPO5 username: admin examples: - - encrypted_password: >- $5$isRr.HJ1IrQP38.m$oViu3DJOpUG2ZsjCBtbITV3mqpxxbZfyWJojLPNSPO5 username: admin items: $ref: '#/components/schemas/UserListItem' maxItems: 3 title: User List type: array required: - name - protocol - protocol_port - load_balancer_id title: CreateLbListenerSerializer type: object TaskIDsSerializer: properties: tasks: description: >- List of task IDs representing asynchronous operations. Use these IDs to monitor operation progress: - `GET /v1/tasks/{task_id}` - Check individual task status and details Poll task status until completion (`FINISHED`/`ERROR`) before proceeding with dependent operations. example: - d478ae29-dedc-4869-82f0-96104425f565 examples: - - d478ae29-dedc-4869-82f0-96104425f565 items: type: string title: Tasks type: array required: - tasks title: TaskIDsSerializer type: object LbListenerProtocolEnum: enum: - HTTP - HTTPS - PROMETHEUS - TCP - TERMINATED_HTTPS - UDP title: LbListenerProtocolEnum type: string UserListItem: properties: encrypted_password: description: Encrypted password to auth via Basic Authentication example: $5$isRr.HJ1IrQP38.m$oViu3DJOpUG2ZsjCBtbITV3mqpxxbZfyWJojLPNSPO5 examples: - $5$isRr.HJ1IrQP38.m$oViu3DJOpUG2ZsjCBtbITV3mqpxxbZfyWJojLPNSPO5 maxLength: 128 title: Encrypted Password type: string username: description: Username to auth via Basic Authentication example: admin examples: - admin maxLength: 32 pattern: ^[a-zA-Z0-9][a-zA-Z 0-9._\-]{1,30}[a-zA-Z0-9._]$ title: Username type: string required: - username - encrypted_password title: UserListItem type: object securitySchemes: APIKey: description: >- API key for authentication. Make sure to include the word `apikey`, followed by a single space and then your token. Example: `apikey 1234$abcdef` type: apiKey in: header name: Authorization ````