# Create segments URL: https://docs.hanzo.ai/docs/openapi/marketing/post-marketing-lists-by-id-segments > Saves a filter over one list as a segment and answers 201 with it and how many subscribers it selects now. `POST /v1/marketing/lists/{id}/segments` > [Marketing →](https://docs.hanzo.ai/docs/openapi/marketing) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides) | | | | ------------- | ------------------------------------------------------- | | **Address** | `https://api.hanzo.ai/v1/marketing/lists/{id}/segments` | | **Method** | `POST` | | **Operation** | `post_marketing_lists_by_id_segments` | | **Auth** | `Authorization: Bearer $HANZO_API_KEY` | Saves a filter over one list as a segment and answers 201 with it and how many subscribers it selects now. Org admin only. ## Request 20 fields, body `application/json` (required). | Field | In | Type | Required | Description | | ------------------------ | ---- | ---------------- | -------- | -------------------------------------------------------------------------------------------------------------------- | | `id` | path | string | yes | ID is the list, by id or slug, from the path. | | `filter` | body | marketing.Filter | — | | | `filter.basis` | body | string | — | Basis keeps subscribers by the consent basis recorded for them: explicit, legitimate\_interest or unverified. | | `filter.clickedAfter` | body | integer (int64) | — | ClickedAfter keeps subscribers who clicked a link at or after this time. | | `filter.confirmedAfter` | body | integer (int64) | — | ConfirmedAfter and ConfirmedBefore bound when the subscription was confirmed, unix seconds, inclusive. | | `filter.confirmedBefore` | body | integer (int64) | — | ConfirmedBefore is the upper bound of ConfirmedAfter's range. | | `filter.createdAfter` | body | integer (int64) | — | CreatedAfter and CreatedBefore bound when the subscriber joined the list, unix seconds, inclusive. | | `filter.createdBefore` | body | integer (int64) | — | CreatedBefore is the upper bound of CreatedAfter's range. | | `filter.field` | body | string | — | Field names a custom field, and Value keeps subscribers whose value for it is exactly this. | | `filter.notOpenedSince` | body | integer (int64) | — | NotOpenedSince keeps subscribers who have opened nothing since this time, including those who never opened anything. | | `filter.openedAfter` | body | integer (int64) | — | OpenedAfter keeps subscribers who opened a broadcast at or after this time. | | `filter.q` | body | string | — | Q keeps subscribers whose address or name begins with it, case-insensitively. | | `filter.ref` | body | string | — | Ref keeps subscribers from one source instance: a form id, a page, an import batch id. | | `filter.source` | body | string | — | Source keeps subscribers that came from this kind of source: form, page, api, import or commerce. | | `filter.status` | body | string | — | Status is one status or several, comma-separated: pending, subscribed, unsubscribed, bounced, complained, cleaned. | | `filter.tag` | body | string | — | Tag keeps subscribers carrying this tag. | | `filter.value` | body | string | — | Value is the custom field's value Field keeps. | | `id` | body | string | — | ID is the list, by id or slug, from the path. | | `name` | body | string | — | Name is what the segment is called. | | `sid` | body | string | — | SID is the segment to change, from the path; ignored on create. | ## Response | Status | Body | Meaning | | --------- | ----------------- | ------- | | `201` | marketing.Segment | created | | `default` | problem-details | refused | `201` body — 22 fields. | Field | In | Type | Always | Description | | ------------------------ | ---- | ---------------- | ------ | -------------------------------------------------------------------------------------------------------------------- | | `count` | body | integer (int64) | — | Count is how many subscribers it selects now; filled on read of one. | | `createdAt` | body | integer (int64) | — | CreatedAt is when it was saved, unix seconds. | | `filter` | body | marketing.Filter | — | | | `filter.basis` | body | string | — | Basis keeps subscribers by the consent basis recorded for them: explicit, legitimate\_interest or unverified. | | `filter.clickedAfter` | body | integer (int64) | — | ClickedAfter keeps subscribers who clicked a link at or after this time. | | `filter.confirmedAfter` | body | integer (int64) | — | ConfirmedAfter and ConfirmedBefore bound when the subscription was confirmed, unix seconds, inclusive. | | `filter.confirmedBefore` | body | integer (int64) | — | ConfirmedBefore is the upper bound of ConfirmedAfter's range. | | `filter.createdAfter` | body | integer (int64) | — | CreatedAfter and CreatedBefore bound when the subscriber joined the list, unix seconds, inclusive. | | `filter.createdBefore` | body | integer (int64) | — | CreatedBefore is the upper bound of CreatedAfter's range. | | `filter.field` | body | string | — | Field names a custom field, and Value keeps subscribers whose value for it is exactly this. | | `filter.notOpenedSince` | body | integer (int64) | — | NotOpenedSince keeps subscribers who have opened nothing since this time, including those who never opened anything. | | `filter.openedAfter` | body | integer (int64) | — | OpenedAfter keeps subscribers who opened a broadcast at or after this time. | | `filter.q` | body | string | — | Q keeps subscribers whose address or name begins with it, case-insensitively. | | `filter.ref` | body | string | — | Ref keeps subscribers from one source instance: a form id, a page, an import batch id. | | `filter.source` | body | string | — | Source keeps subscribers that came from this kind of source: form, page, api, import or commerce. | | `filter.status` | body | string | — | Status is one status or several, comma-separated: pending, subscribed, unsubscribed, bounced, complained, cleaned. | | `filter.tag` | body | string | — | Tag keeps subscribers carrying this tag. | | `filter.value` | body | string | — | Value is the custom field's value Field keeps. | | `id` | body | string | — | ID is the segment's id ("seg\_" and 96 random bits in hex). | | `list` | body | string | — | List is the list it selects from. | | `name` | body | string | — | Name is what the segment is called; at most 200 characters. | | `updatedAt` | body | integer (int64) | — | UpdatedAt is the last change, unix seconds. | Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors). ## Examples **CLI** ```bash hanzo marketing lists segments create ``` **SDK** **.ts** ```ts import { Configuration, MarketingApi } from 'hanzoai'; const api = new MarketingApi(new Configuration({ accessToken: process.env.HANZO_API_KEY })); const { data } = await api.postMarketingListsByIdSegments({ id: 'id', filter: {"basis":"","clickedAfter":0,"confirmedAfter":0,"confirmedBefore":0}, id: "" }); ``` **.py** ```python from hanzoai.cloud import ApiClient, Configuration from hanzoai.cloud.api import MarketingApi client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"])) result = MarketingApi(client).post_marketing_lists_by_id_segments(id='id', filter={"basis":"","clickedAfter":0,"confirmedAfter":0,"confirmedBefore":0}, id="") ``` **.go** ```go cfg := hanzoai.NewConfiguration() cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY")) client := hanzoai.NewAPIClient(cfg) resp, _, err := client.MarketingAPI.PostMarketingListsByIdSegments(context.Background()).Execute() if err != nil { return err } ``` **.rs** ```rust use hanzo_client::apis::{configuration::Configuration, marketing_api}; let mut cfg = Configuration::new(); cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok(); let result = marketing_api::post_marketing_lists_by_id_segments(&cfg, Default::default()).await?; ``` **.java** ```java import ai.hanzo.cloud.ApiClient; import ai.hanzo.cloud.api.MarketingApi; ApiClient client = new ApiClient(); client.setBearerToken(System.getenv("HANZO_API_KEY")); var result = new MarketingApi(client).postMarketingListsByIdSegments(); ``` The method above is the one at the current release of the document. `hanzoai@8.5.914` (npm) and `hanzoai@8.5.914` (PyPI) were generated from an earlier release, where this operation carried a different id, so it spells the method differently — regenerating the clients is what makes the two agree. [SDKs →](https://docs.hanzo.ai/docs/sdks) **HTTP** ```bash curl -X POST https://api.hanzo.ai/v1/marketing/lists//segments \ -H "Authorization: Bearer $HANZO_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "filter": { "basis": "", "clickedAfter": 0, "confirmedAfter": 0, "confirmedBefore": 0 }, "id": "" }' ``` **MCP** MCP reaches **marketing** through the `marketing` tool, which names its 82 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them: ```bash curl -X POST https://api.hanzo.ai/v1/mcp \ -H "Content-Type: application/json" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "describe", "arguments": { "op": "list_marketing_audiences" } } }' ``` --- [Marketing API](https://docs.hanzo.ai/docs/openapi/marketing) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)