# Create flamegraph

URL: https://docs.hanzo.ai/docs/openapi/o11y/getflamegraph

> Returns a trace's flamegraph: spans bucketed by depth level, each level ordered as it is drawn, around the selected span.

`POST /v1/o11y/traces/{traceId}/flamegraph`

> [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/traces/{traceId}/flamegraph` |
| **Method**    | `POST`                                                     |
| **Operation** | `GetFlamegraph`                                            |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                     |

Returns a trace's flamegraph: spans bucketed by depth level,
each level ordered as it is drawn, around the selected span.

Callers need the viewer role; the runtime's own gate enforces it.

## Request

9 fields, body `application/json` (required).

| Field                          | In   | Type                      | Required | Description |
| ------------------------------ | ---- | ------------------------- | -------- | ----------- |
| `traceId`                      | path | string                    | yes      |             |
| `selectFields`                 | body | o11y.TelemetryFieldKey\[] | —        |             |
| `selectFields[].description`   | body | string                    | —        |             |
| `selectFields[].fieldContext`  | body | any                       | —        |             |
| `selectFields[].fieldDataType` | body | any                       | —        |             |
| `selectFields[].name`          | body | string                    | yes      |             |
| `selectFields[].signal`        | body | any                       | —        |             |
| `selectFields[].unit`          | body | string                    | —        |             |
| `selectedSpanId`               | body | string                    | —        |             |

## Response

| Status    | Body                        | Meaning           |
| --------- | --------------------------- | ----------------- |
| `200`     | o11y.O11yTraceFlamegraphOut | ok                |
| `202`     | Approval                    | held for approval |
| `default` | problem-details             | refused           |

`200` body — 23 fields.

| Field                                   | In   | Type                         | Always | Description          |
| --------------------------------------- | ---- | ---------------------------- | ------ | -------------------- |
| `data`                                  | body | o11y.GettableFlamegraphTrace | —      |                      |
| `data.endTimestampMillis`               | body | integer (int64)              | —      |                      |
| `data.hasMore`                          | body | boolean                      | —      |                      |
| `data.spans`                            | body | o11y.FlamegraphSpan\[]\[]    | —      |                      |
| `data.spans[][].attributes`             | body | object                       | —      |                      |
| `data.spans[][].attributes.*`           | body | any                          | —      |                      |
| `data.spans[][].durationNano`           | body | integer (uint64)             | —      |                      |
| `data.spans[][].event`                  | body | o11y.Event\[]                | —      |                      |
| `data.spans[][].event[].attributeMap`   | body | object                       | —      |                      |
| `data.spans[][].event[].attributeMap.*` | body | any                          | —      |                      |
| `data.spans[][].event[].isError`        | body | boolean                      | —      |                      |
| `data.spans[][].event[].name`           | body | string                       | —      |                      |
| `data.spans[][].event[].timeUnixNano`   | body | integer (uint64)             | —      |                      |
| `data.spans[][].hasError`               | body | boolean                      | —      |                      |
| `data.spans[][].level`                  | body | integer (int64)              | —      |                      |
| `data.spans[][].name`                   | body | string                       | —      |                      |
| `data.spans[][].parentSpanId`           | body | string                       | —      |                      |
| `data.spans[][].resource`               | body | object                       | —      |                      |
| `data.spans[][].resource.*`             | body | string                       | —      |                      |
| `data.spans[][].spanId`                 | body | string                       | —      |                      |
| `data.spans[][].timestamp`              | body | integer (uint64)             | —      |                      |
| `data.startTimestampMillis`             | body | integer (int64)              | —      |                      |
| `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 traces flamegraph <traceId>
```

**SDK**

**.ts**

```ts
import { Configuration, O11yApi } from 'hanzoai';

const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getFlamegraph({ traceId: 'traceId', selectFields: [{"name":"<name>"}], selectedSpanId: "<selectedSpanId>" });
```

**.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).get_flamegraph(trace_id='traceId', select_fields=[{"name":"<name>"}], selected_span_id="<selectedSpanId>")
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.O11yAPI.GetFlamegraph(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::get_flamegraph(&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).getFlamegraph();
```

**HTTP**

```bash
curl -X POST https://api.hanzo.ai/v1/o11y/traces/<traceId>/flamegraph \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "selectFields": [
         {
           "name": "<name>"
         }
       ],
       "selectedSpanId": "<selectedSpanId>"
     }'
```

**MCP**

Tool `o11y`, op `GetFlamegraph` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`.

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "o11y",
         "arguments": {
           "op": "GetFlamegraph",
           "input": {
             "traceId": "<traceId>",
             "selectFields": [
               {
                 "name": "<name>"
               }
             ],
             "selectedSpanId": "<selectedSpanId>"
           }
         }
       }
     }'
```

---

[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)