# List clusters URL: https://docs.hanzo.ai/docs/openapi/o11y/post-o11y-clusters-list > Lists Kubernetes clusters over a time range, each with its CPU and memory usage against allocatable capacity and its attributes; filterable, groupable and paginated. `POST /v1/o11y/clusters/list` > [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/clusters/list` | | **Method** | `POST` | | **Operation** | `post_o11y_clusters_list` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Lists Kubernetes clusters over a time range, each with its CPU and memory usage against allocatable capacity and its attributes; filterable, groupable and paginated. ## Request 24 fields, body `application/json` (required). | Field | In | Type | Required | Description | | ------------------------------ | ---- | -------------------- | -------- | ---------------- | | `end` | body | integer (int64) | — | epoch time in ms | | `filters` | body | o11y.FilterSet | — | | | `filters.items` | body | o11y.FilterItem\[] | — | | | `filters.items[].key` | body | o11y.AttributeKey | — | | | `filters.items[].key.dataType` | body | string | — | | | `filters.items[].key.isColumn` | body | boolean | — | | | `filters.items[].key.isJSON` | body | boolean | — | | | `filters.items[].key.key` | body | string | — | | | `filters.items[].key.type` | body | string | — | | | `filters.items[].op` | body | string | — | | | `filters.items[].value` | body | any | — | | | `filters.op` | body | string | — | | | `groupBy` | body | o11y.AttributeKey\[] | — | | | `groupBy[].dataType` | body | string | — | | | `groupBy[].isColumn` | body | boolean | — | | | `groupBy[].isJSON` | body | boolean | — | | | `groupBy[].key` | body | string | — | | | `groupBy[].type` | body | string | — | | | `limit` | body | integer (int64) | — | | | `offset` | body | integer (int64) | — | | | `orderBy` | body | o11y.OrderBy | — | | | `orderBy.columnName` | body | string | — | | | `orderBy.order` | body | string | — | | | `start` | body | integer (int64) | — | epoch time in ms | ## Response | Status | Body | Meaning | | --------- | ----------------------- | ----------------- | | `200` | o11y.O11yClusterListOut | ok | | `202` | Approval | held for approval | | `default` | problem-details | refused | `200` body — 12 fields. | Field | In | Type | Always | Description | | ---------------------------------- | ---- | ------------------------- | ------ | -------------------- | | `data` | body | o11y.ClusterListResponse | — | | | `data.records` | body | o11y.ClusterListRecord\[] | — | | | `data.records[].clusterUID` | body | string | — | | | `data.records[].cpuAllocatable` | body | number (double) | — | | | `data.records[].cpuUsage` | body | number (double) | — | | | `data.records[].memoryAllocatable` | body | number (double) | — | | | `data.records[].memoryUsage` | body | number (double) | — | | | `data.records[].meta` | body | object | — | | | `data.records[].meta.*` | body | string | — | | | `data.total` | body | integer (int64) | — | | | `data.type` | 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 clusters list ``` **SDK** **.ts** ```ts import { Configuration, O11yApi } from 'hanzoai'; const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postO11yClustersList({ end: 0, filters: {"items":[{"key":{"dataType":null,"isColumn":null,"isJSON":null,"key":null},"op":"","value":""}],"op":""} }); ``` **.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_clusters_list(end=0, filters={"items":[{"key":{"dataType":null,"isColumn":null,"isJSON":null,"key":null},"op":"","value":""}],"op":""}) ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.O11yAPI.PostO11yClustersList(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_clusters_list(&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).postO11yClustersList(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/o11y/clusters/list \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "end": 0, "filters": { "items": [ { "key": { "dataType": null, "isColumn": null, "isJSON": null, "key": null }, "op": "", "value": "" } ], "op": "" } }' ``` **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)