# Get traces — GET /v1/o11y/traces/{traceId}

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

> Returns one trace's spans as a column/row table, optionally centred on a span and walked a fixed number of levels up and down from it — the read the trace explorer opens a trace with.

`GET /v1/o11y/traces/{traceId}`

> [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}` |
| **Method**    | `GET`                                           |
| **Operation** | `SearchTraces`                                  |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`          |

Returns one trace's spans as a column/row table, optionally
centred on a span and walked a fixed number of levels up and down from it —
the read the trace explorer opens a trace with.

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

## Request

5 fields.

| Field             | In    | Type    | Required | Description |
| ----------------- | ----- | ------- | -------- | ----------- |
| `traceId`         | path  | string  | yes      |             |
| `spanId`          | query | string  | —        |             |
| `levelUp`         | query | integer | —        |             |
| `levelDown`       | query | integer | —        |             |
| `spanRenderLimit` | query | integer | —        |             |

## Response

| Status    | Body                        | Meaning           |
| --------- | --------------------------- | ----------------- |
| `200`     | o11y.O11yTraceSpanWindow\[] | ok                |
| `202`     | Approval                    | held for approval |
| `default` | problem-details             | refused           |

`200` body — 5 fields.

| Field                     | In   | Type             | Always | Description                                                                      |
| ------------------------- | ---- | ---------------- | ------ | -------------------------------------------------------------------------------- |
| `[].columns`              | body | string\[]        | —      | Columns names the fields each row carries, in row order.                         |
| `[].endTimestampMillis`   | body | integer (uint64) | —      | EndTimestampMillis is when it closes.                                            |
| `[].events`               | body | any\[]\[]        | —      | Events are the rows, each positionally matching Columns.                         |
| `[].isSubTree`            | body | boolean          | —      | IsSubTree says the window is a subtree of the trace rather than the whole of it. |
| `[].startTimestampMillis` | body | integer (uint64) | —      | StartTimestampMillis is when the window opens.                                   |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo o11y traces get <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.searchTraces({ traceId: 'traceId' });
```

**.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).search_traces(trace_id='traceId')
```

**.go**

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

resp, _, err := client.O11yAPI.SearchTraces(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::search_traces(&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).searchTraces();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/o11y/traces/<traceId> \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

Tool `o11y`, op `SearchTraces` — 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": "SearchTraces",
           "input": {
             "traceId": "<traceId>"
           }
         }
       }
     }'
```

---

[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)