# Create services URL: https://docs.hanzo.ai/docs/openapi/o11y/post-o11y-services > Lists the instrumented services seen in the window, each with the request profile of its entry-point spans: p99 and average latency, call and error rates, and the entry-point operations the numbers were computed over. `POST /v1/o11y/services` > [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/services` | | **Method** | `POST` | | **Operation** | `post_o11y_services` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Lists the instrumented services seen in the window, each with the request profile of its entry-point spans: p99 and average latency, call and error rates, and the entry-point operations the numbers were computed over. ## Request 9 fields, body `application/json` (required). | Field | In | Type | Required | Description | | --------------------- | ---- | ---------------------- | -------- | ---------------------------------------------------------------------- | | `end` | body | string | — | End is the window's end, epoch nanoseconds as a string. | | `start` | body | string | — | Start is the window's start, epoch nanoseconds as a string. | | `tags` | body | o11y.O11yServiceTag\[] | — | Tags narrow the spans counted, each a span-attribute predicate. | | `tags[].BoolValues` | body | boolean\[] | — | BoolValues are the boolean operands, when the attribute is a bool. | | `tags[].Key` | body | string | — | Key is the span attribute to test. | | `tags[].NumberValues` | body | number (double)\[] | — | NumberValues are the numeric operands, when the attribute is a number. | | `tags[].Operator` | body | string | — | Operator is how to test it, e.g. in, not\_in. | | `tags[].StringValues` | body | string\[] | — | StringValues are the string operands, when the attribute is a string. | | `tags[].TagType` | body | string | — | TagType says which plane the attribute lives on, e.g. tag or resource. | ## Response | Status | Body | Meaning | | --------- | -------------------- | ----------------- | | `200` | o11y.O11yServicesOut | ok | | `202` | Approval | held for approval | | `default` | problem-details | refused | `200` body — 13 fields. | Field | In | Type | Always | Description | | -------------------------------- | ---- | ----------------------- | ------ | ------------------------------------------------------------------------- | | `data` | body | o11y.O11yService\[] | — | Data holds one entry per service. | | `data[].avgDuration` | body | number (double) | — | AvgDuration is their average latency, nanoseconds. | | `data[].callRate` | body | number (double) | — | CallRate is calls per second over the window. | | `data[].dataWarning` | body | o11y.O11yServiceWarning | — | | | `data[].dataWarning.topLevelOps` | body | string\[] | — | TopLevelOps are the entry-point operations the profile was computed over. | | `data[].errorRate` | body | number (double) | — | ErrorRate is the percentage of calls that errored. | | `data[].fourXXRate` | body | number (double) | — | FourXXRate is the percentage of calls that answered 4xx. | | `data[].num4XX` | body | integer (uint64) | — | Num4XX is how many of the calls answered 4xx. | | `data[].numCalls` | body | integer (uint64) | — | NumCalls is how many entry-point spans landed in the window. | | `data[].numErrors` | body | integer (uint64) | — | NumErrors is how many of the calls errored. | | `data[].p99` | body | number (double) | — | Percentile99 is the p99 latency of its entry-point spans, nanoseconds. | | `data[].serviceName` | body | string | — | ServiceName is the service. | | `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 services create ``` **SDK** **.ts** ```ts import { Configuration, O11yApi } from 'hanzoai'; const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postO11yServices({ end: "", start: "" }); ``` **.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_services(end="", start="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.O11yAPI.PostO11yServices(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_services(&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).postO11yServices(); ``` **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/o11y/services \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "end": "", "start": "" }' ``` **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)