# Harvest

> Connect Harvest to sanda: what to prepare, the fields the connection form asks for, and how its data lands in your warehouse.

## Connect Harvest

:::steps
1. **Open the catalogue.** In the console, go to **Data · Connections** and press **New connection**.
2. **Choose Harvest.** It is listed under product and operations; you can also search for it by name.
3. **Fill in the form.** Enter the fields below. Credentials go straight to sanda’s sync engine and are never stored in sanda’s database.
4. **Choose what to sync.** Pick the tables you want, and a sync mode for each. See [choose what to sync](https://docs.sanda-os.com.au/connections/choose-tables).
5. **Run the first sync.** sanda tests the connection, then lands each table you chose in your warehouse.
:::

## Configuration fields

What the connection form asks for. Required fields are marked; the rest are optional.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| **Authentication mechanism** | one of 2 options | No | Choose how to authenticate to Harvest. |
| **Account ID** | string, secret | Yes | Harvest account ID. Required for all Harvest requests in pair with Personal Access Token. |
| **Start Date** | string | Yes | UTC date and time in the format 2017-01-25T00:00:00Z. Any data before this date will not be replicated. |
| **Number of Concurrent Threads** | integer | No | Number of concurrent threads for syncing. Higher values can speed up syncs but may increase API rate limit usage. Adjust based on your Harvest API plan. Default `4`. |

### Authentication mechanism

Choose how to authenticate to Harvest.

Choose one of the following. Each asks for its own fields.

**Authenticate via Harvest (OAuth)**

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| **Client ID** | string | Yes | The Client ID of your Harvest developer application. |
| **Client Secret** | string, secret | Yes | The Client Secret of your Harvest developer application. |
| **Refresh Token** | string, secret | Yes | Refresh Token to renew the expired Access Token. |

**Authenticate with Personal Access Token**

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| **Personal Access Token** | string, secret | Yes | Log into Harvest and then create new personal access token. |


## Related

:::links
- [Sync modes](https://docs.sanda-os.com.au/connections/sync-modes): How sanda reads each table on every run.
- [Sync schedules](https://docs.sanda-os.com.au/connections/schedules): How often a connection runs.
- [Allowlist sanda’s address](https://docs.sanda-os.com.au/connections/allowlist): For a system behind a firewall.
- [Troubleshoot connections](https://docs.sanda-os.com.au/connections/troubleshooting): What an error means and how to fix it.
:::