{"id":"kubesphere-metrics-server","name":"metrics-server","homepage":"https://hub.docker.com/r/kubesphere/metrics-server","repo_url":"https://hub.docker.com/r/kubesphere/metrics-server","category":"infrastructure","subcategories":[],"tags":["kubernetes","metrics","autoscaling","hpa","infrastructure"],"what_it_does":"metrics-server (Kubernetes) aggregates and exposes resource metrics (CPU/memory) for Horizontal Pod Autoscaler (HPA) and related autoscaling/metrics consumers via the Kubernetes Metrics API (/apis/metrics.k8s.io).","use_cases":["Enable HPA based on CPU/memory utilization","Provide Kubernetes Metrics API for components that rely on aggregated pod/node resource metrics","Support dashboards/operations tooling that query metrics.k8s.io"],"not_for":["A full monitoring/observability stack (logs, traces, long-term metrics storage)","High-cardinality or business-metric analytics","Direct Prometheus-like time-series scraping requirements without an external adapter"],"best_when":"You need Kubernetes resource metrics for autoscaling and other cluster components and want the lightweight aggregated Metrics API.","avoid_when":"You require long-term metric retention, high-cardinality analytics, or a complete monitoring solution.","alternatives":["Prometheus + adapter (e.g., Prometheus Adapter for Kubernetes custom metrics)","Cloud provider metrics/APIs (where applicable)","Custom metrics adapters (e.g., for application-level metrics)"],"af_score":43.2,"security_score":69.0,"reliability_score":47.5,"package_type":"mcp_server","discovery_source":["docker_mcp"],"priority":"low","status":"evaluated","version_evaluated":null,"last_evaluated":"2026-04-04T21:29:10.222281+00:00","interface":{"has_rest_api":true,"has_graphql":false,"has_grpc":false,"has_mcp_server":false,"mcp_server_url":null,"has_sdk":false,"sdk_languages":[],"openapi_spec_url":null,"webhooks":false},"auth":{"methods":["Kubernetes API server authentication/authorization (RBAC)"],"oauth":false,"scopes":false,"notes":"Authentication is typically handled by Kubernetes (service accounts + RBAC) rather than a standalone OAuth/API-key system."},"pricing":{"model":null,"free_tier_exists":false,"free_tier_limits":null,"paid_tiers":[],"requires_credit_card":false,"estimated_workload_costs":null,"notes":"Open-source software typically self-hosted; any 'cost' is infrastructure/operational effort."},"requirements":{"requires_signup":false,"requires_credit_card":false,"domain_verification":false,"data_residency":[],"compliance":[],"min_contract":null},"agent_readiness":{"af_score":43.2,"security_score":69.0,"reliability_score":47.5,"mcp_server_quality":0.0,"documentation_accuracy":40.0,"error_message_quality":0.0,"error_message_notes":null,"auth_complexity":55.0,"rate_limit_clarity":20.0,"tls_enforcement":80.0,"auth_strength":70.0,"scope_granularity":60.0,"dependency_hygiene":50.0,"secret_handling":80.0,"security_notes":"Security primarily depends on Kubernetes RBAC and network access to kubelets/Kubernetes API. metrics-server should be deployed with least-privilege service account permissions; avoid overly broad RBAC. TLS is typically used via Kubernetes API server and kubelet endpoints depending on cluster configuration.","uptime_documented":20.0,"version_stability":60.0,"breaking_changes_history":70.0,"error_recovery":40.0,"idempotency_support":"false","idempotency_notes":null,"pagination_style":"none","retry_guidance_documented":false,"known_agent_gotchas":["Relies on Kubernetes API availability and RBAC permissions; failures may surface as HTTP 403/401/5xx from the API server","Metrics can be missing/lagged if scraping/aggregation fails or kubelets are not reachable","HPA requires correct metrics API availability and suitable permissions"]}}