# Submit buy offer

This endpoint is designed for completing the purchase of an ordinal.\
\
**Platform Cost:** \
A platform fee is applied only when an ordinal is sold. It is not charged for listing an ordinal. The current fee is 1% of sale amount charged to the seller.

This requires the signed psbt from /create-offer end point. Which is a  psbt signed by the buyer and base64 encoded. This returns a transaction id for the ordinal sale transaction.

### `POST` Submit offer

## Submit buy offer for a an odinal

<mark style="color:green;">`POST`</mark> `https://api.ordinalsbot.com/marketplace/submit-offer`

API Key is required in the header:

`headers: { 'x-api-key': '<YOUR_API_KEY>', ...otherHeaders }`

#### Request Body

| Name                                                    | Type   | Description                                                                                                                                                 |
| ------------------------------------------------------- | ------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ordinalId<mark style="color:red;">\*</mark>             | String | Id of the ordinal being purchased.                                                                                                                          |
| signedBuyerPSBTBase64<mark style="color:red;">\*</mark> | String | Signed psbt transaction in base64 encoding. This is the output of the creating an offer using /create-offer and singing it using the buyer's payment wallet |

{% tabs %}
{% tab title="200: OK " %}

```json

{
    "txId": "aa1c27........2767", // transaction id for the purchase transaction
}

```

{% endtab %}

{% tab title="500: Internal Server Error " %}

```json
{
    status: 'error',
    error: 'error reason'
}
```

{% endtab %}
{% endtabs %}


---

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ordinalsbot.com/marketplace-1/submit-buy-offer.md?ask=<question>
```

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