URL: /code/apps/prospecting/create-prospect · Id: `page:/code/apps/prospecting/create-prospect`

# Prospect.create

> Saves a person you found as a Prospect, with where you found them and the basis to write to them.

POST https://api.sb/{your-domain}/prospects

Saves a person you found as a [Prospect](https://startupbuilder.dev/business/nouns/prospect), with where you found them and the basis to write to them.

- **Action class:** None
- **Approval:** Runs on its own
- **Emits:** `Prospect.created`
- **Price:** Free

```text title="Run it · Ask"
Save Rosa Alvarez at Northgate Rentals as a prospect: she posted a leasing coordinator role.
```

```ts title="Run it · SDK"
import { $ } from 'startup-builder'

const result = await $.try.Prospect.create({ foundIn: 'Organization.find, hiring for a leasing coordinator', basis: 'Business contact at a company that fits; role posted 2026-10-21.' })
```

```json title="Run it · Response"
{
  "api": "https://api.sb/leaseline.app",
  "prospect": {
    "$id": "https://api.sb/leaseline.app/prospects/prospect_No3rG8tH5r",
    "$type": "Prospect",
    "foundIn": "Organization.find, hiring for a leasing coordinator"
  },
  "action": {
    "operation": "Prospect.create",
    "mode": "try",
    "status": "done"
  }
}
```

It extends the hub’s record call [`Prospect.create`](https://startupbuilder.dev/business/nouns/prospect/create), which every [Prospect](https://startupbuilder.dev/business/nouns/prospect) takes. It is one of the [Verbs](https://startupbuilder.dev/business/nouns/verb) of [Prospecting](/code/apps/prospecting#verbs).

## Inputs
| Name | Type | Default | Meaning |
| --- | --- | --- | --- |
| `foundIn` | `string` | Required | Where the startup found them. |
| `basis` | `string` | Required | The recorded reason you may contact them. |
| `acquisition` | `Acquisition` | None. | A Prospect’s Acquisition names the outbound Play and Mailbox that first reached it. Optional. |

The hub inherits this call on every Noun: it takes the Prospect’s own Properties, listed on [the hub’s Prospect page](https://startupbuilder.dev/business/nouns/prospect).

## Outputs
| Field | Type | What `null` means |
| --- | --- | --- |
| `prospect` | `Prospect` | Never null: the Prospect as the call leaves it. |

## Effects
**Action class**

None: no approval rule names it, so it runs within its seat’s Permissions and Limits

**Modes**

- `try`: Runs every check and returns the record as it would be; nothing is stored.
- `send`: Returns a pending Action at once; `Prospect.created` fires when it is done.
- `do`: Waits for the Action to finish and returns the record.

**Idempotency**

Only with a key: the same `Idempotency-Key` and input return the first Action, and the same key with other input returns `409`.

**Saved or shared**

The Prospect is saved as the call leaves it, with the Action that changed it.

**Emits**

`Prospect.created` with `{ prospect }`

**Performed by**

Whichever seat calls it

**Price**

Free on your own account: the platform charges nothing for the call.

## On each Venue
It acts on your own records and reaches no Venue, so every account answers the same way.

## What try does
Runs every check the call meets and returns the record as it would be; nothing is stored, sent or posted.

## Refuses when
The hub sets no guard of its own on this call: it refuses only on the shared checks every write meets (a missing record, a Permission the seat lacks).

## When it waits
Returns in one response; nothing waits.

## Example
In `send` mode the call returns its pending Action at once, and `Prospect.created` delivers the result.

**Ask**

```text
Save Rosa Alvarez at Northgate Rentals as a prospect: she posted a
leasing coordinator role.
```

**API**

```bash
curl -X POST "https://api.sb/leaseline.app/prospects?mode=send" \
  -H "Authorization: Bearer $SB_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
  "foundIn": "Organization.find, hiring for a leasing coordinator",
  "basis": "Business contact at a company that fits; role posted 2026-10-21."
}'
```

**CLI**

```bash
npx startup-builder do Prospect.create --send --data '{
  "foundIn": "Organization.find, hiring for a leasing coordinator",
  "basis": "Business contact at a company that fits; role posted 2026-10-21."
}'
```

`--send` returns the pending Action at once.

**MCP**

```json
{
  "name": "do",
  "arguments": {
    "mode": "send",
    "code": "return await $.Prospect.create({ foundIn: 'Organization.find, hiring for a leasing coordinator', basis: 'Business contact at a company that fits; role posted 2026-10-21.' })"
  }
}
```

**SDK**

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

const result = await $.send.Prospect.create({
  foundIn: 'Organization.find, hiring for a leasing coordinator',
  basis: 'Business contact at a company that fits; role posted 2026-10-21.',
})
```


```json title="Response, in send mode"
{
  "mode": "send",
  "action": {
    "$id": "https://api.sb/leaseline.app/actions/action_Sd3kQ9vT2w",
    "operation": "Prospect.create",
    "status": "pending",
    "reason": "running"
  }
}
```

To retry, send the same `Idempotency-Key`: the retry returns the first answer for $0. A new key reads again.

## Used by
None.

## Related
[`Prospect.engage`](/code/apps/prospecting/engage) · [`Prospect.update`](/code/apps/prospecting/update) · [`ICP.create`](/code/apps/prospecting/create-icp)