# List span mappers

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

> Lists the mappers belonging to one group, in the order they are applied.

`GET /v1/o11y/span_mapper_groups/{groupId}/span_mappers`

> [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/span_mapper_groups/{groupId}/span_mappers` |
| **Method**    | `GET`                                                                    |
| **Operation** | `ListSpanMappers`                                                        |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                                   |

Lists the mappers belonging to one group, in the order they are
applied.

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

## Request

1 field.

| Field     | In   | Type   | Required | Description |
| --------- | ---- | ------ | -------- | ----------- |
| `groupId` | path | string | yes      |             |

## Response

| Status    | Body                    | Meaning           |
| --------- | ----------------------- | ----------------- |
| `200`     | o11y.O11ySpanMappersOut | ok                |
| `202`     | Approval                | held for approval |
| `default` | problem-details         | refused           |

`200` body — 18 fields.

| Field                                     | In   | Type                     | Always | Description          |
| ----------------------------------------- | ---- | ------------------------ | ------ | -------------------- |
| `data`                                    | body | o11y.GettableSpanMappers | —      |                      |
| `data.items`                              | body | o11y.SpanMapper\[]       | —      |                      |
| `data.items[].config`                     | body | o11y.SpanMapperConfig    | —      |                      |
| `data.items[].config.sources`             | body | o11y.SpanMapperSource\[] | —      |                      |
| `data.items[].config.sources[].context`   | body | any                      | —      |                      |
| `data.items[].config.sources[].key`       | body | string                   | —      |                      |
| `data.items[].config.sources[].operation` | body | any                      | —      |                      |
| `data.items[].config.sources[].priority`  | body | integer (int64)          | —      |                      |
| `data.items[].createdAt`                  | body | string (date-time)       | —      |                      |
| `data.items[].createdBy`                  | body | string                   | —      |                      |
| `data.items[].enabled`                    | body | boolean                  | —      |                      |
| `data.items[].fieldContext`               | body | any                      | —      |                      |
| `data.items[].group_id`                   | body | any                      | —      |                      |
| `data.items[].id`                         | body | any                      | —      |                      |
| `data.items[].name`                       | body | string                   | —      |                      |
| `data.items[].updatedAt`                  | body | string (date-time)       | —      |                      |
| `data.items[].updatedBy`                  | 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 span_mapper_groups span_mappers list <groupId>
```

**SDK**

**.ts**

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

const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.listSpanMappers({ groupId: 'groupId' });
```

**.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).list_span_mappers(group_id='groupId')
```

**.go**

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

resp, _, err := client.O11yAPI.ListSpanMappers(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::list_span_mappers(&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).listSpanMappers();
```

**HTTP**

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

**MCP**

Tool `o11y`, op `ListSpanMappers` — 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": "ListSpanMappers",
           "input": {
             "groupId": "<groupId>"
           }
         }
       }
     }'
```

---

[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)