# List timeline

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

> Returns paginated timeline entries for a rule's state transitions, filterable by state and a label expression, cursor-paginated.

`GET /v1/o11y/rules/{id}/history/timeline`

> [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/rules/{id}/history/timeline` |
| **Method**    | `GET`                                                      |
| **Operation** | `GetRuleHistoryTimeline`                                   |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                     |

Returns paginated timeline entries for a rule's state
transitions, filterable by state and a label expression, cursor-paginated. Viewer gate.

## Request

8 fields.

| Field              | In    | Type    | Required | Description                                                         |
| ------------------ | ----- | ------- | -------- | ------------------------------------------------------------------- |
| `id`               | path  | string  | yes      |                                                                     |
| `start`            | query | integer | —        | Start is the window start, unix milliseconds.                       |
| `end`              | query | integer | —        | End is the window end, unix milliseconds.                           |
| `state`            | query | string  | —        | State keeps only entries in one alert state, e.g. firing or normal. |
| `filterExpression` | query | string  | —        | FilterExpression narrows entries to those whose labels match it.    |
| `limit`            | query | integer | —        | Limit caps how many entries come back.                              |
| `order`            | query | string  | —        | Order sorts by time, asc or desc.                                   |
| `cursor`           | query | string  | —        | Cursor resumes a previous page; opaque, returned as nextCursor.     |

## Response

| Status    | Body                            | Meaning           |
| --------- | ------------------------------- | ----------------- |
| `200`     | o11y.O11yRuleHistoryTimelineOut | ok                |
| `202`     | Approval                        | held for approval |
| `default` | problem-details                 | refused           |

`200` body — 23 fields.

| Field                                     | In   | Type                             | Always | Description          |
| ----------------------------------------- | ---- | -------------------------------- | ------ | -------------------- |
| `data`                                    | body | o11y.GettableRuleStateTimeline   | —      |                      |
| `data.items`                              | body | o11y.GettableRuleStateHistory\[] | —      |                      |
| `data.items[].fingerprint`                | body | integer (uint64)                 | —      |                      |
| `data.items[].labels`                     | body | o11y.Label\[]                    | —      |                      |
| `data.items[].labels[].key`               | body | o11y.TelemetryFieldKey           | —      |                      |
| `data.items[].labels[].key.description`   | body | string                           | —      |                      |
| `data.items[].labels[].key.fieldContext`  | body | any                              | —      |                      |
| `data.items[].labels[].key.fieldDataType` | body | any                              | —      |                      |
| `data.items[].labels[].key.name`          | body | string                           | yes    |                      |
| `data.items[].labels[].key.signal`        | body | any                              | —      |                      |
| `data.items[].labels[].key.unit`          | body | string                           | —      |                      |
| `data.items[].labels[].value`             | body | any                              | —      |                      |
| `data.items[].overallState`               | body | any                              | —      |                      |
| `data.items[].overallStateChanged`        | body | boolean                          | —      |                      |
| `data.items[].ruleId`                     | body | string                           | —      |                      |
| `data.items[].ruleName`                   | body | string                           | —      |                      |
| `data.items[].state`                      | body | any                              | —      |                      |
| `data.items[].stateChanged`               | body | boolean                          | —      |                      |
| `data.items[].unixMilli`                  | body | integer (int64)                  | —      |                      |
| `data.items[].value`                      | body | number (double)                  | —      |                      |
| `data.nextCursor`                         | body | string                           | —      |                      |
| `data.total`                              | body | integer (uint64)                 | —      |                      |
| `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 rules history timeline get <id>
```

**SDK**

**.ts**

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

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

**.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_rule_history_timeline(id='id')
```

**.go**

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

resp, _, err := client.O11yAPI.GetRuleHistoryTimeline(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_rule_history_timeline(&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).getRuleHistoryTimeline();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/o11y/rules/<id>/history/timeline \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

Tool `o11y`, op `GetRuleHistoryTimeline` — 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": "GetRuleHistoryTimeline",
           "input": {
             "id": "<id>"
           }
         }
       }
     }'
```

---

[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)