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

# API Keys

> Issue, use, and replace DualEntry Public API keys: choosing roles, sending the X-API-KEY header, and rotating a key without downtime.

API keys are how every request to the DualEntry Public API authenticates. These pages cover the full lifecycle: issuing a key, sending it, and replacing it.

## What this section covers

* **[How to Give an Integration Access to DualEntry](./how-to-give-an-integration-access)**: issue a key with the right roles for the integration you're building.
* **[How to Authenticate Your Requests to the DualEntry API](./how-to-authenticate-your-requests)**: send the `X-API-KEY` header and handle both `403` failure modes.
* **[How to Replace an API Key](./how-to-replace-an-api-key)**: rotate a key without an authentication gap.

## Where to go next

For the conceptual model behind keys, roles, and statuses, see [Authentication](/developers/guides/api/authentication).