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

# Update Custom Function

> Update an existing custom function

Update a custom function's configuration. Only include fields you want to change.

## Path Parameters

<ParamField path="id" type="string" required>
  UUID of the custom function to update
</ParamField>

## Request Body

<ParamField body="name" type="string">
  Function name in snake\_case. Must be unique per agent.
</ParamField>

<ParamField body="description" type="string">
  Description of what the function does
</ParamField>

<ParamField body="http_method" type="string">
  HTTP method: `GET`, `POST`, `PUT`, `PATCH`, or `DELETE`
</ParamField>

<ParamField body="endpoint_url" type="string">
  The webhook URL to call
</ParamField>

<ParamField body="headers" type="array">
  Custom headers to include with requests
</ParamField>

<ParamField body="body_schema" type="array">
  Parameters the AI should collect
</ParamField>

<ParamField body="response_variables" type="array">
  Variables to extract from response
</ParamField>

<ParamField body="timeout_ms" type="integer">
  Request timeout in milliseconds
</ParamField>

<ParamField body="max_retries" type="integer">
  Number of retry attempts
</ParamField>

<ParamField body="is_active" type="boolean">
  Whether the function is active
</ParamField>

## Response

Returns the updated custom function object.

<RequestExample>
  ```bash cURL theme={null}
  curl -X PATCH "https://api.magpipe.ai/functions/v1/custom-functions/789e0123-e89b-12d3-a456-426614174000" \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "description": "Look up order status including tracking info",
      "is_active": true
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "id": "789e0123-e89b-12d3-a456-426614174000",
    "agent_id": "123e4567-e89b-12d3-a456-426614174000",
    "user_id": "456e7890-e89b-12d3-a456-426614174000",
    "name": "check_order_status",
    "description": "Look up order status including tracking info",
    "http_method": "POST",
    "endpoint_url": "https://api.yourstore.com/orders/status",
    "headers": [],
    "body_schema": [
      {
        "name": "order_id",
        "type": "string",
        "description": "The customer order ID",
        "required": true
      }
    ],
    "response_variables": [
      {"name": "status", "json_path": "$.data.status"}
    ],
    "timeout_ms": 120000,
    "max_retries": 2,
    "is_active": true,
    "created_at": "2024-01-15T10:30:00Z",
    "updated_at": "2024-01-15T14:00:00Z"
  }
  ```

  ```json 404 theme={null}
  {
    "error": "Custom function not found"
  }
  ```

  ```json 409 theme={null}
  {
    "error": "A function with this name already exists for this agent"
  }
  ```
</ResponseExample>