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

# Integrations

> Connect the external services your providers need — carriers, tax engines, and more — with credentials stored once per store.

Integrations are where you connect an outside service to your store: a carrier account for live shipping rates and labels, a tax engine, a fulfillment service. Each one holds the credentials that service needs, stored once per store, and every provider that uses that service reads them from here.

Find them under **Settings → Integrations**.

## What you will see

Integrations arrive with **provider extensions**. Install a provider — the EasyPost provider, for example — and its integration appears on this page, grouped by what it does: Shipping, Tax, or Other. A store with no providers installed sees an empty page, and that is normal.

Each integration shows its connection status:

| Status               | Meaning                                          |
| -------------------- | ------------------------------------------------ |
| Not connected        | No credentials entered yet                       |
| Connected (inactive) | Credentials saved and verified, but switched off |
| Active               | In use by providers                              |

## Connecting one

Open the integration and enter what the service asks for — typically an API key, sometimes an account identifier or a choice between a test and a live environment. Secrets are masked once saved.

Turning an integration **active** verifies the connection first. If the service cannot be reached with those credentials, the switch is refused and the error tells you what the service said, so a mistyped key never silently breaks shipping or tax at checkout.

## Where it is used

Once active, the integration is picked from wherever a provider needs it. A delivery method that quotes live carrier rates points at the carrier integration; a market that uses an external tax engine points at the tax integration. Those pickers link back here, so there is one place credentials live and one place to rotate them.

## Related

* [Delivery Profiles](/docs/user/settings/delivery-profiles) — delivery methods that quote through a carrier integration
* [Tax Rates](/docs/user/settings/tax-rates) — choosing a tax provider per market