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infisical/docs/api-reference/overview/authentication.mdx

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---
title: "Authentication"
description: "How to authenticate with the Infisical Public API"
---
## Essentials
The Public API accepts multiple modes of authentication being via API Key, Service Account credentials, or [Infisical Token](/documentation/platform/token).
- API Key: Provides full access to all endpoints representing the user.
- Service Account: Provides scoped access to an organization and select projects representing a machine such as a VM or application client.
- [Infisical Token](/documentation/platform/token): Provides short-lived, scoped CRUD access to the secrets of a specific project and environment.
<AccordionGroup>
<Accordion title="API Key">
The API key mode uses an API key to authenticate with the API.
To authenticate requests with Infisical using the API Key, you must include an API key in the `X-API-KEY` header of HTTP requests made to the platform.
You can obtain an API key in User Settings > API Keys
![API key dashboard](../../images/api-key-dashboard.png)
![API key in personal settings](../../images/api-key-settings.png)
</Accordion>
<Accordion title="Service Account">
The Service Account mode uses an Access Key to authenticate with the API and a Public Key and Private Key to perform any cryptographic operations.
To authenticate requests with Infisical using the Access Key, you must include it in the `Authorization` header of HTTP requests made to the platform with the value `Bearer <access_key>`.
You can create a Service Account in Organization Settings > Service Accounts
</Accordion>
<Accordion title="Infisical Token">
The Infisical Token mode uses an Infisical Token to authenticate with the API.
To authenticate requests with Infisical using the Infisical Token, you must include your Infisical Token in the `Authorization` header of HTTP requests made to the platform with the value `Bearer <infisical_token>`.
You can obtain an Infisical Token in Project Settings > Service Tokens.
![token add](../../images/project-token-add.png)
</Accordion>
</AccordionGroup>
## Use Cases
Depending on your use case, it may make sense to use one or another authentication mode:
- API Key (not recommended): Use if you need full access to the Public API without needing to access any secrets endpoints (because API keys can't encrypt/decrypt secrets).
- Service Account (recommeded): Use if you need access to multiple projects and environments in an organization; service accounts can generate short-lived access tokens, making them useful for some complex setups.
- Service Token (recommeded): Use if you need short-lived, scoped CRUD access to the secrets of a specific project and environment.