# Create investments

URL: https://docs.hanzo.ai/docs/openapi/captable/post-captable-rounds-by-id-investments

> Records one investor's money into an open round.

`POST /v1/captable/rounds/{id}/investments`

> [Captable →](https://docs.hanzo.ai/docs/openapi/captable) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                                            |
| ------------- | ---------------------------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/captable/rounds/{id}/investments` |
| **Method**    | `POST`                                                     |
| **Operation** | `post_captable_rounds_by_id_investments`                   |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                     |

Records one investor's money into an open round.

The round must be OPEN; investing into a closed one is refused. Where the round
carries a price per share, the investment also issues the shares it buys and the
answer names them.

## Request

6 fields, body `application/json` (required).

| Field           | In   | Type   | Required | Description                                                |
| --------------- | ---- | ------ | -------- | ---------------------------------------------------------- |
| `id`            | path | string | yes      | ID is the round to invest in.                              |
| `amount`        | body | any    | —        | Amount is the money invested, in the round's own currency. |
| `comments`      | body | any    | —        | Comments is a free-text note kept with the investment.     |
| `date`          | body | any    | —        | Date is when the investment was made, YYYY-MM-DD.          |
| `id`            | body | string | —        | ID is the round to invest in.                              |
| `stakeholderId` | body | any    | —        | StakeholderID is the investor.                             |

## Response

| Status    | Body                      | Meaning |
| --------- | ------------------------- | ------- |
| `201`     | captable.captableInvested | created |
| `default` | problem-details           | refused |

`201` body — 4 fields.

| Field        | In   | Type    | Always | Description                                                                                       |
| ------------ | ---- | ------- | ------ | ------------------------------------------------------------------------------------------------- |
| `id`         | body | string  | —      | ID is the investment record's id.                                                                 |
| `message`    | body | string  | —      | Message is the human sentence the cap table wrote.                                                |
| `newShareId` | body | string  | —      | NewShareID names the certificate the investment issued, when the round carries a price per share. |
| `success`    | body | boolean | —      | Success is true when the investment was recorded.                                                 |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo captable rounds investments <id>
```

**SDK**

**.ts**

```ts
import { Configuration, CaptableApi } from 'hanzoai';

const api = new CaptableApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postCaptableRoundsByIdInvestments({ id: 'id', amount: "<amount>", comments: "<comments>" });
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import CaptableApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = CaptableApi(client).post_captable_rounds_by_id_investments(id='id', amount="<amount>", comments="<comments>")
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.CaptableAPI.PostCaptableRoundsByIdInvestments(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, captable_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = captable_api::post_captable_rounds_by_id_investments(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.CaptableApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new CaptableApi(client).postCaptableRoundsByIdInvestments();
```

**HTTP**

```bash
curl -X POST https://api.hanzo.ai/v1/captable/rounds/<id>/investments \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "amount": "<amount>",
       "comments": "<comments>"
     }'
```

**MCP**

MCP reaches **captable** through the `captable` tool, which names its 30 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_captable_classes"
         }
       }
     }'
```

---

[Captable API](https://docs.hanzo.ai/docs/openapi/captable) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)