# Cohort methods: create, get, list

URL: /code/sdk/cohort/records · Id: `page:code/sdk/cohort/records`

> The Cohort Verbs create, get, list as typed SDK methods, with inputs, result, refusals and an example.

Reference for [Cohort](/business/nouns/cohort), one group of [Cohort methods](/code/sdk/cohort).

### Cohort.create
Creates a Cohort. [Verb page](/business/nouns/cohort/create?interface=sdk).

```ts
interface CohortVerbs {
  create(input: CohortCreateInput, options?: SB.CallOptions): SB.Call<Cohort>
}
```

Emits `Cohort.created`.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `query` | `json` | Yes | The Portfolio query that selects its Startups. |
| `control` | `boolean` | No | True when the Cohort stays on the prior Version as the control. |
| `portfolio` | [Portfolio](/business/nouns/portfolio) | No | A Cohort selects its Startups from one Portfolio by a saved query. |
| `version` | [Version](/business/nouns/version) | No | Every Startup in a Cohort runs the same Version of a shared definition; a control Cohort keeps the prior one. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `cohort` | [Cohort](/business/nouns/cohort) | Yes | The Cohort. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```ts
import { $ } from 'startup-builder'

const cohort = await $.Cohort.create({ query: {} })
```

### Cohort.get
Returns one Cohort by id. [Verb page](/business/nouns/cohort/get?interface=sdk).

```ts
interface CohortVerbs {
  get(input: CohortGetInput, options?: SB.CallOptions): SB.Call<Cohort>
}
```

Reads only: it emits no Event.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | `string` | Yes | The id of the Cohort. |
| `at` | `string` | No | A time or Version name: the record as it stood then. Unset: as it stands now. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `cohort` | [Cohort](/business/nouns/cohort) | Yes | The Cohort. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```ts
import { $ } from 'startup-builder'

const cohort = await $.Cohort.get({ id: 'cohort_YxPOKnSexq' })
```

### Cohort.list
Returns Cohorts, newest first, one page at a time. [Verb page](/business/nouns/cohort/list?interface=sdk).

```ts
interface CohortVerbs {
  list(input?: CohortListInput, options?: SB.CallOptions): SB.ListCall<Cohort>
}
```

Reads only: it emits no Event.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `limit` | `integer` | No | At most this many records, up to 100. The default is 20. |
| `after` | `string` | No | The cursor from the previous page. |
| `where` | `string` | No | A filter over the properties, such as `paidAt = null and total.amount > 500`. |
| `sort` | `string` | No | Properties to sort by, comma-separated; a leading minus sorts descending. |
| `total` | `boolean` | No | True adds the match count as `meta.total`, exact up to 10,000 matches and estimated above. |
| `facets` | `string` | No | Properties to count by value, comma-separated, returned as `meta.facets`. |
| `fields` | `string` | No | Properties to return on each record, comma-separated; `$id` and `$type` always return. |
| `include` | `string` | No | Related records to embed in place of their URLs, comma-separated. |
| `depth` | `integer` | No | How many levels of related records to embed. The default is 1. |
| `q` | `string` | No | Words to match across the text properties, ranked by relevance. |
| `match` | `string` | No | Ranks the search by `words`, or `meaning`; words is the default. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `cohorts` | list of [Cohort](/business/nouns/cohort) | Yes | One page of Cohorts. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```ts
import { $ } from 'startup-builder'

const cohorts = await $.Cohort.list({ limit: 20 })
```