> This page is for version 2025-09-18 (default).
> For other versions, use one of these documentation indexes:
> - 2025-09-18 (default): https://apidocs.polytomic.com/2025-09-18/llms.txt
> - 2024-02-08: https://apidocs.polytomic.com/2024-02-08/llms.txt
> - 2023-04-25: https://apidocs.polytomic.com/2023-04-25/llms.txt
> - 2022-12-12: https://apidocs.polytomic.com/2022-12-12/llms.txt
> - 2021-05-23: https://apidocs.polytomic.com/2021-05-23/llms.txt

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://apidocs.polytomic.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://apidocs.polytomic.com/_mcp/server.

# Attio

Supports:
* ✅ Models
* ✅ Model sync destination
* ✅ Bulk sync source
* ✅ Connection Proxy


## Connection

### Configuration
<table>
<thead>
<tr>
<th>Name</th><th>Type</th><th>Description</th><th>Required</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>auth_method</code></td>
<td><code>string</code></td>
<td style="vertical-align: top;">Authentication method<br/><br/>Accepted values: `oauth`, `api_key` <a href="#auth-method-api-key">↓</a></td>
<td><code>required</code></td>
</tr>
<tr>
<td><code>disable_list_entry_projection</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Skip parent fields when pulling lists</td>
<td><code>optional</code></td>
</tr>
<tr>
<td><code>enable_attribute_history</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Enable Attio attribute change history</td>
<td><code>optional</code></td>
</tr>
<tr>
<td><code>enable_webhooks</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Enable Attio webhook updates for bulk syncs</td>
<td><code>optional</code></td>
</tr>
</tbody>
</table>

<table>
<thead>
<tr>
<th>Read-only property</th><th>Type</th><th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>workspace_name</code></td>
<td><code>string</code></td>
<td style="vertical-align: top;">Workspace name</td>
</tr>
</tbody>
</table>

<a id="auth-method-api-key"></a>

#### `auth_method`

When `auth_method` is `api_key`:

<table>
<thead>
<tr>
<th>Name</th><th>Type</th><th>Description</th><th>Required</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>api_key</code></td>
<td><code>string</code></td>
<td style="vertical-align: top;">API key</td>
<td><code>required</code></td>
</tr>
</tbody>
</table>

```json
{
  "name": "Attio connection",
  "type": "attio",
  "configuration": {
    "api_key": "",
    "auth_method": "api_key",
    "disable_list_entry_projection": false,
    "enable_attribute_history": false,
    "enable_webhooks": false
  }
}
```


#### Example

```json
{
  "name": "Attio connection",
  "type": "attio",
  "configuration": {
    "auth_method": "oauth",
    "disable_list_entry_projection": false,
    "enable_attribute_history": false,
    "enable_webhooks": false
  }
}
```


## Model Sync
### Source
#### Configuration
<table>
<thead>
<tr>
<th>Name</th><th>Type</th><th>Description</th><th>Required</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>list</code></td>
<td><code>object</code></td>
<td style="vertical-align: top;">List</td>
<td><code>required</code></td>
</tr>
<tr>
<td><code>object</code></td>
<td><code>string</code></td>
<td style="vertical-align: top;">Object</td>
<td><code>required</code></td>
</tr>
</tbody>
</table>


#### Example
```json
{
  ...
  "configuration": {
    "list": {},
    "object": ""
  }
}
```


### Target
Attio connections may be used as the destination in a model sync.
#### All targets

##### Configuration
<table>
<thead>
<tr>
<th>Name</th><th>Type</th><th>Description</th><th>Required</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>auto_create_multi_select_options</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Create select options if they don't exist</td>
<td><code>optional</code></td>
</tr>
<tr>
<td><code>remove_invalid_references</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Remove invalid relationship ID references</td>
<td><code>optional</code></td>
</tr>
<tr>
<td><code>replace_multiselect_values</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Treat multiselect values as replacements</td>
<td><code>optional</code></td>
</tr>
<tr>
<td><code>write_null_values</code></td>
<td><code>boolean</code></td>
<td style="vertical-align: top;">Copy null values</td>
<td><code>optional</code></td>
</tr>
</tbody>
</table>


##### Example
```json
{
  ...
  "target": {
      "configuration": {
        "auto_create_multi_select_options": false,
        "remove_invalid_references": false,
        "replace_multiselect_values": false,
        "write_null_values": false
    }
  }
}
```









## Bulk Sync
### Source
Attio connections may be used as a bulk sync source. No additional configuration options are required.