# Create clusters URL: https://docs.hanzo.ai/docs/openapi/o11y/post-o11y-infra-monitoring-clusters > Lists Kubernetes clusters with CPU and memory usage against allocatable capacity summed over their nodes, plus per-group node readiness and pod phase counts. `POST /v1/o11y/infra_monitoring/clusters` > [O11y →](https://docs.hanzo.ai/docs/openapi/o11y) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | -------------------------------------------------------- | | **Address** | `https://api.hanzo.ai/v1/o11y/infra_monitoring/clusters` | | **Method** | `POST` | | **Operation** | `post_o11y_infra_monitoring_clusters` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Lists Kubernetes clusters with CPU and memory usage against allocatable capacity summed over their nodes, plus per-group node readiness and pod phase counts. Rows answer as 'list' under the default k8s.cluster.name grouping or 'grouped\_list' under a custom groupBy; a metric with no data in the window answers -1. Filterable by expression, orderable by usage or allocatable, paginated by offset and limit. ## Request 22 fields, body `application/json` (required). | Field | In | Type | Required | Description | | --------------------------- | ---- | -------------------------------- | -------- | --------------------------------------------------- | | `end` | body | integer (int64) | — | | | `filter` | body | o11y.Filter | — | | | `filter.expression` | body | string | — | expression to filter by following the filter syntax | | `groupBy` | body | o11y.GroupByKey\[] | — | | | `groupBy[].description` | body | string | — | | | `groupBy[].fieldContext` | body | any | — | | | `groupBy[].fieldDataType` | body | any | — | | | `groupBy[].name` | body | string | yes | | | `groupBy[].signal` | body | any | — | | | `groupBy[].unit` | body | string | — | | | `limit` | body | integer (int64) | — | | | `offset` | body | integer (int64) | — | | | `orderBy` | body | o11y.querybuildertypesv5.OrderBy | — | | | `orderBy.direction` | body | any | — | direction to order by | | `orderBy.key` | body | o11y.OrderByKey | — | | | `orderBy.key.description` | body | string | — | | | `orderBy.key.fieldContext` | body | any | — | | | `orderBy.key.fieldDataType` | body | any | — | | | `orderBy.key.name` | body | string | yes | | | `orderBy.key.signal` | body | any | — | | | `orderBy.key.unit` | body | string | — | | | `start` | body | integer (int64) | — | | ## Response | Status | Body | Meaning | | --------- | ------------------------- | ----------------- | | `200` | o11y.O11yInfraClustersOut | ok | | `202` | Approval | held for approval | | `default` | problem-details | refused | `200` body — 27 fields. | Field | In | Type | Always | Description | | ----------------------------------------------- | ---- | ------------------------------- | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `data` | body | o11y.Clusters | — | | | `data.endTimeBeforeRetention` | body | boolean | — | | | `data.records` | body | o11y.ClusterRecord\[] | — | | | `data.records[].clusterCPU` | body | number (double) | — | | | `data.records[].clusterCPUAllocatable` | body | number (double) | — | | | `data.records[].clusterMemory` | body | number (double) | — | | | `data.records[].clusterMemoryAllocatable` | body | number (double) | — | | | `data.records[].clusterName` | body | string | — | TODO(nikhilmantri0902): once the underlying attr key is migrated to k8s.cluster.uid (see ClusterNameAttrKey), surface ClusterUID alongside (or replace) ClusterName. | | `data.records[].meta` | body | object | — | | | `data.records[].meta.*` | body | string | — | | | `data.records[].nodeCountsByReadiness` | body | o11y.NodeCountsByReadiness | — | | | `data.records[].nodeCountsByReadiness.notReady` | body | integer (int64) | — | | | `data.records[].nodeCountsByReadiness.ready` | body | integer (int64) | — | | | `data.records[].podCountsByPhase` | body | o11y.PodCountsByPhase | — | | | `data.records[].podCountsByPhase.failed` | body | integer (int64) | — | | | `data.records[].podCountsByPhase.pending` | body | integer (int64) | — | | | `data.records[].podCountsByPhase.running` | body | integer (int64) | — | | | `data.records[].podCountsByPhase.succeeded` | body | integer (int64) | — | | | `data.records[].podCountsByPhase.unknown` | body | integer (int64) | — | | | `data.total` | body | integer (int64) | — | | | `data.type` | body | any | — | | | `data.warning` | body | o11y.QueryWarnData | — | | | `data.warning.message` | body | string | — | | | `data.warning.url` | body | string | — | | | `data.warning.warnings` | body | o11y.QueryWarnDataAdditional\[] | — | | | `data.warning.warnings[].message` | body | string | — | | | `status` | body | string | — | Status is "success". | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo o11y infra_monitoring clusters ``` **SDK** **.ts** ```ts import { Configuration, O11yApi } from 'hanzoai'; const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postO11yInfraMonitoringClusters({ end: 0, filter: {"expression":""} }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import O11yApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = O11yApi(client).post_o11y_infra_monitoring_clusters(end=0, filter={"expression":""}) ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.O11yAPI.PostO11yInfraMonitoringClusters(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, o11y_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = o11y_api::post_o11y_infra_monitoring_clusters(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.O11yApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new O11yApi(client).postO11yInfraMonitoringClusters(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/o11y/infra_monitoring/clusters \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "end": 0, "filter": { "expression": "" } }' ``` **MCP** MCP reaches **o11y** through the `o11y` tool, which names its 307 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them: ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "describe", "arguments": { "op": "list_o11y_autocomplete_aggregate_attributes" } } }' ``` --- [O11y API](https://docs.hanzo.ai/docs/openapi/o11y) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)