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

# get_brain_node

> Fetch the full content of a single brain node.

Fetches the full content of a single [brain](/brains/overview) node. Use it to read the complete source behind a [query\_brain](/mcp/tools/query-brain) result (pass the `node id` it returned) or an entry from [get\_brain\_tree](/mcp/tools/get-brain-tree).

## Input

| Parameter | Type   | Required | Description                                                                               |
| --------- | ------ | -------- | ----------------------------------------------------------------------------------------- |
| `brainId` | string | Yes      | The brain the node belongs to.                                                            |
| `nodeId`  | string | Yes      | The node to fetch, e.g. a `node id` from a [query\_brain](/mcp/tools/query-brain) result. |

## Example

**Prompt:**

> *"Show me the full source for that RLS result."*

**Tool call:**

```json theme={null}
{
  "brainId": "fa8d5392-fc77-4eb4-8a4c-64e0005c56b6",
  "nodeId": "ab699e6d-0a57-4383-a191-8fbed2832f9f"
}
```

**Response:**

```
- Type: chunk_part
- ID: ab699e6d-0a57-4383-a191-8fbed2832f9f
- Path: row-level-security > enabling-row-level-security > 1/1
- Content:
You can enable RLS for any table using the `enable row level security` clause:

    alter table "table_name" enable row level security;

Once you have enabled RLS, no data will be accessible via the API when using a
publishable key, until you create policies.
```

The `Path` is the node's breadcrumb within the brain, which helps the agent place the content in context.

## When to use it

* A [query\_brain](/mcp/tools/query-brain) result is truncated and you want the full passage.
* You found a relevant node in [get\_brain\_tree](/mcp/tools/get-brain-tree) and want to read it.
* The agent needs the complete, verbatim source rather than a ranked excerpt.

## See also

* [query\_brain](/mcp/tools/query-brain): find relevant nodes by searching.
* [get\_brain\_tree](/mcp/tools/get-brain-tree): browse nodes by structure.