> ## Documentation Index
> Fetch the complete documentation index at: https://developers.venturu.com/llms.txt
> Use this file to discover all available pages before exploring further.

# contact_seller

> Send a message to a business listing seller on Venturu. Requires authentication.

## contact\_seller

Send a contact message to the seller (or their representing broker) of a specific business listing on Venturu. The recipient will be notified and can respond through the platform.

<Warning>
  This tool **requires authentication**. You must be signed in with your Venturu account. See [Authentication](/mcp/authentication) for details.
</Warning>

## Parameters

| Parameter   | Type      | Required | Description                                                                   |
| ----------- | --------- | -------- | ----------------------------------------------------------------------------- |
| `listingId` | `integer` | **Yes**  | The listing's numeric ID (from `search_businesses` or `get_business` results) |
| `message`   | `string`  | **Yes**  | The message to send to the seller                                             |

<Info>
  If the listing has a seller's agent (broker), the message is sent to the broker. Otherwise, it goes directly to the business owner.
</Info>

## Response

On success:

```
Your message has been sent to the seller on Venturu. They will be
notified and can respond through the platform.

Message: "I'm interested in this business. Could we schedule a call
to discuss the financials in more detail?"
```

## Error Responses

<AccordionGroup>
  <Accordion title="Not authenticated">
    ```
    This tool requires authentication. Please connect your Venturu
    account to contact sellers.
    ```

    **Solution:** Connect your Venturu account through the OAuth flow in your MCP client.
  </Accordion>

  <Accordion title="Listing not found">
    ```
    Listing not found with ID "99999".
    ```

    **Solution:** Use `search_businesses` to find valid listing IDs.
  </Accordion>

  <Accordion title="No seller associated">
    ```
    Listing has no seller or seller agent.
    ```

    This is rare — most listings have a seller or broker associated.
  </Accordion>
</AccordionGroup>

## Typical Flow

1. Call `search_businesses` to find listings matching your criteria
2. Call `get_business` to view full details of a listing
3. Call `contact_seller` with the listing ID and your message

## Tool Annotations

| Annotation        | Value   |
| ----------------- | ------- |
| `readOnlyHint`    | `false` |
| `destructiveHint` | `false` |
| `openWorldHint`   | `true`  |

This tool sends a message to an external party, which is why it's annotated as open-world.