# List lineage URL: https://docs.hanzo.ai/docs/openapi/dataset/riskdatasetlineage > Shows where a version's rows came from and whether that can still be demonstrated. `GET /v1/dataset/{name}/lineage` > [Dataset →](https://docs.hanzo.ai/docs/openapi/dataset) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ------------------------------------------------ | | **Address** | `https://api.hanzo.ai/v1/dataset/{name}/lineage` | | **Method** | `GET` | | **Operation** | `riskDatasetLineage` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Shows where a version's rows came from and whether that can still be demonstrated. The answer is MEASURED, not recalled: the plane asks the source the same bounded question again and compares it to the fingerprint taken when the version was built. Anything but exact agreement is reported as drift — the source is fed by a rollup that runs behind the events, so "it holds more now" is the ordinary case and it means re-running the spec would not reproduce this version. An admitted gap is actionable; an unfalsifiable claim is not. IT IS A PRICED, BOUNDED READ, because it is the same statement a materialisation is charged for: an exact distinct-count over up to 400 days of this org's feature surface. It takes the org's ONE source-scan slot, so a tenant looping it spends one scan and not a thousand; it counts against the plane's ceiling, so the fleet's warehouse is bounded too; and it runs under this plane's own deadline rather than the caller's patience. ## Request 2 fields. | Field | In | Type | Required | Description | | --------- | ----- | ------- | -------- | ----------------------------------- | | `name` | path | string | yes | Name is the dataset, from the path. | | `version` | query | integer | — | Version is the version to trace. | ## Response | Status | Body | Meaning | | --------- | ------------------- | ------- | | `200` | dataset.riskLineage | ok | | `default` | problem-details | refused | `200` body — 14 fields. | Field | In | Type | Always | Description | | -------------- | ---- | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------ | | `dataset` | body | string | — | Dataset is the dataset traced. | | `digest` | body | string | — | Digest is the version's fingerprint, repeated here so a lineage answer is self-contained. | | `from` | body | string | — | From is where the window actually read opens, RFC 3339. | | `holds` | body | integer (int64) | — | Holds is what the source holds for the same window NOW. | | `oversize` | body | integer (int64) | — | Oversize is how many subjects the window held that were too large to represent when this version was built. | | `refusal` | body | string | — | Refusal says which way it failed — the window expired, or the source now holds a different count. | | `reproducible` | body | boolean | — | Reproducible is true when the source still holds what this version was built from — measured by asking it again, not recalled. | | `retention` | body | string | — | Retention is the source's own expiry rule as the store reports it, read at materialisation time rather than assumed. | | `rows` | body | integer (int64) | — | Rows is how many rows the source held for that window at materialisation time. | | `share` | body | integer (int64) | — | Share is the fraction of subjects admitted, in thousandths. | | `source` | body | string | — | Source is the plane the rows were derived from. | | `subjects` | body | integer (int64) | — | Subjects is how many distinct subjects those rows belonged to. | | `to` | body | string | — | To is where it ends: the spec's own end pulled BACK by the maturity horizon, so it is usually earlier than the spec says. | | `version` | body | integer (int64) | — | Version is the version traced — the one asked for, or the newest published one when the request named none. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo dataset lineage ``` **SDK** **.ts** ```ts import { Configuration, DatasetApi } from 'hanzoai'; const api = new DatasetApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.riskDatasetLineage({ name: 'name' }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import DatasetApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = DatasetApi(client).risk_dataset_lineage(name='name') ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.DatasetAPI.RiskDatasetLineage(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, dataset_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = dataset_api::risk_dataset_lineage(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.DatasetApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new DatasetApi(client).riskDatasetLineage(); ``` **HTTP** ```bash curl https://api.hanzo.ai/v1/dataset//lineage \ -H "Authorization: Bearer $HANZO_API_KEY" ``` **MCP** Tool `dataset`, op `riskDatasetLineage` — 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": "dataset", "arguments": { "op": "riskDatasetLineage", "input": { "name": "" } } } }' ``` --- [Dataset API](https://docs.hanzo.ai/docs/openapi/dataset) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)