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

# How Sandbox URLs Work

Every FlashAPI endpoint is documented using its **Production path**, which starts with:

```text theme={null}
/oapi/
```

To call the same endpoint in the **Sandbox**, insert `/sandbox` immediately before `/oapi`.

The rest of the request remains exactly the same, including:

\* Endpoint path \* Query parameters \* Request body \* Headers

## URL Structure

| Environment    | Base URL Pattern                           | Example — Get Symbol Latest Data                                     |
| -------------- | ------------------------------------------ | -------------------------------------------------------------------- |
| **Production** | `https://flashapi.phs.vn/oapi/...`         | `https://flashapi.phs.vn/oapi/priceboard/symbol-latest-data`         |
| **Sandbox**    | `https://flashapi.phs.vn/sandbox/oapi/...` | `https://flashapi.phs.vn/sandbox/oapi/priceboard/symbol-latest-data` |

### Production

```text theme={null}
https://flashapi.phs.vn/oapi/priceboard/symbol-latest-data
```

### Sandbox

```text theme={null}
https://flashapi.phs.vn/sandbox/oapi/priceboard/symbol-latest-data
```

The only difference is the `/sandbox` segment:

```text theme={null}
Production:
https://flashapi.phs.vn/oapi/...

Sandbox:
https://flashapi.phs.vn/sandbox/oapi/...
```

## Switching Between Sandbox and Production

All code examples in this guide use the **Sandbox URL** by default.

You can copy and run the examples directly for testing.

When you are ready to switch to Production, replace **only the base URL**.

### Example

**Sandbox:**

```bash theme={null}
curl -X GET \
  "https://flashapi.phs.vn/sandbox/oapi/priceboard/symbol-latest-data"
```

**Production:**

```bash theme={null}
curl -X GET \
  "https://flashapi.phs.vn/oapi/priceboard/symbol-latest-data"
```

The following remain unchanged:

\* Endpoint path \* Query parameters \* Request body \* Headers \* API request structure

<Note>
  You only need to replace the base URL when switching from Sandbox to Production. No changes to the endpoint path, parameters, or request structure are required.
</Note>

<Warning>
  Before calling Production APIs, make sure your Production OpenAPI access has been approved and you are using the appropriate Production credentials.
</Warning>