# Function routes: create, get, list

URL: /code/api/function/records · Id: `page:code/api/function/records`

> The Function Verbs create, get, list as api.sb routes, with inputs, result, refusals and an example.

Reference for [Function](/business/nouns/function), one group of [Function routes](/code/api/function).

### Function.create
Creates a Function. [Verb page](/business/nouns/function/create?interface=api).

```text
POST /{namespace}/functions
```

Body, as JSON: the inputs. Emits `Function.created`.

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `kind` | `string` | Yes | One of `code`, `generative`, `agentic`, or `human`. |
| `cascade` | `string[]` | No | Kinds tried in order when one declines, such as code, then a Human. |
| `instructions` | `text` | No | For a generative or agentic Function, what it does and how. |
| `model` | `string` | No | For a generative or agentic Function, the model it runs on. |
| `tools` | list of [Verb](/business/nouns/verb) | No | For an agentic Function, the Verbs it may call; Permissions and Limits apply to each. |
| `maxSteps` | `integer` | No | For an agentic Function, the most steps one Action may take. |
| `budget` | `money` | No | The most one Action may spend; the Mandate’s Limits apply as well. |
| `role` | [Role](/business/nouns/role) | No | For a human Function, the Role its Tasks go to. |
| `form` | `json` | No | For a human Function, the form; generated from the Verb’s inputs and outputs when absent. |
| `sla` | `string` | No | For a human Function, how long a Task may wait, as an ISO 8601 duration. |
| `escalateTo` | [Role](/business/nouns/role) | No | For a human Function, the Role a Task moves to when the service level passes. |

**Returns**

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

**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**

```bash
curl -X POST https://api.sb/leaseline.app/functions \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"kind":"code"}'
```

```json
{
  "api": "https://api.sb/leaseline.app",
  "function": {
    "$id": "https://api.sb/leaseline.app/functions/function_6nvaxFYImd",
    "$type": "Function",
    "kind": "code"
  },
  "action": {
    "$id": "https://api.sb/leaseline.app/actions/act_br07HsG8MG",
    "operation": "Function.create",
    "status": "done"
  },
  "links": {
    "self": "https://api.sb/leaseline.app/actions/act_br07HsG8MG"
  }
}
```

### Function.get
Returns one Function by id. [Verb page](/business/nouns/function/get?interface=api).

```text
GET /{namespace}/functions/{id}
```

Path: `id`. Query: the other inputs. Reads only: it emits no Event.

**Inputs**

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

**Returns**

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

**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**

```bash
curl https://api.sb/leaseline.app/functions/function_6nvaxFYImd \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY"
```

```json
{
  "api": "https://api.sb/leaseline.app",
  "$type": "Function",
  "$id": "https://api.sb/leaseline.app/functions/function_6nvaxFYImd",
  "function": {
    "$id": "https://api.sb/leaseline.app/functions/function_6nvaxFYImd",
    "$type": "Function",
    "kind": "code"
  },
  "links": {
    "self": "https://api.sb/leaseline.app/functions/function_6nvaxFYImd",
    "up": "https://api.sb/leaseline.app/functions"
  }
}
```

### Function.list
Returns Functions, newest first, one page at a time. [Verb page](/business/nouns/function/list?interface=api).

```text
GET /{namespace}/functions
```

Query: the inputs. 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 |
| --- | --- | --- | --- |
| `functions` | list of [Function](/business/nouns/function) | Yes | One page of Functions. |

**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**

```bash
curl "https://api.sb/leaseline.app/functions?limit=20" \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY"
```

```json
{
  "api": "https://api.sb/leaseline.app",
  "$type": "Function",
  "functions": [
    {
      "$id": "https://api.sb/leaseline.app/functions/function_6nvaxFYImd",
      "$type": "Function",
      "kind": "code"
    }
  ],
  "meta": {
    "limit": 20,
    "after": "function_6nvaxFYImd"
  },
  "links": {
    "self": "https://api.sb/leaseline.app/functions?limit=20",
    "next": "https://api.sb/leaseline.app/functions?after=function_6nvaxFYImd"
  }
}
```