**Source URL:** https://limited.veevavault.dev/qualityone/vault-api/api-reference/18.1/authentication.md

# Authentication



Authenticate your account using one of the methods outlined below. The response returns a session ID that you can use in subsequent API calls. Session IDs time out after a period of inactivity, which varies by Vault. Learn more about [session duration and management](/vault-api/explanation/session-management).

Every Vault API must include the following header:

## Basic Auth Header {#basic-auth-header}

<FieldTable>
| Name | Description |
| --- | --- |
| `Authorization` | {`sessionId`} |
</FieldTable>
Alternatively, you can use Salesforce or OAuth2/OIDC Delegated Requests.



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**Next:** [Basic](/qualityone/vault-api/api-reference/18.1/authentication/basic)