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> Mirror of <https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/data-cloud-query-api-reference/query-api-v3-get-metadata.html> (Salesforce, Data 360 Query Guide), read 2026-10-23. Salesforce's own page is the authority; this copy exists because that site refuses non-browser readers.

Use the `GET /api/v3/query/{queryId}/metadata` endpoint of the Data 360 Query API to retrieve the output schema for a completed query without fetching data rows. Use this endpoint to inspect column names, types, and nullability before retrieving a large result set, or to validate query output structure in your integration.

*   **HTTP Method**: GET
*   **Format**: REST
*   **URI**: `/api/v3/query/{queryId}/metadata`

| Parameter | Type | Description |
| --- | --- | --- |
| `queryId` | string | Required. The unique identifier of the query returned from `POST /api/v3/query`. Example: `MTAuMjcuMTgxLjE0OTo3NDg0_1cfc8d35`. |

| Header | Value |
| --- | --- |
| `Authorization` | `Bearer {accessToken}` |
| `Accept` | `application/json` or `application/vnd.apache.arrow.stream` |

| Field | Description |
| --- | --- |
| `metadata` | Object containing column schema information |

This example shows a metadata retrieval request and response.

Set `Accept: application/vnd.apache.arrow.stream` to receive the Arrow schema as a binary IPC stream.

*   This endpoint returns the schema only and does not return data rows.
*   Does not support `waitFor` query parameters.
*   Does not return query info in response headers.

*   [Submit SQL Query](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/data-cloud-query-api-reference/query-api-v3-post.html)
*   [Get SQL Query Status](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/data-cloud-query-api-reference/query-api-v3-get-query.html)
*   [Query Services Status Codes](https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/data-cloud-query-api-reference/c360a-api-queryservices-statuscodes.html)


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