> For the complete documentation index, see [llms.txt](https://documentation.proto.cx/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.proto.cx/docs/developers/apis.md).

# APIs

{% hint style="info" %}
API account access is available with the Total plan and above.
{% endhint %}

{% hint style="info" %}
Find the full developer API schema here: <https://v3-api.proto.cx/api/platform/v1/docs>
{% endhint %}

***

## Authentication <a href="#authentication-api" id="authentication-api"></a>

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Note that "sub-companies" is a legacy term for a unit within a workspace, now referred to as "teamspaces" in the current platform and documentation.
{% endhint %}

Each request to the developer API must include a bearer token in the **Authorization** header.

```
Authorization: Bearer {takeover_secret} 
```

This takeover secret can be found in the [teamspace](/docs/settings/teamspaces.md) settings page.

<figure><img src="https://documentation.proto.cx/~gitbook/image?url=https%3A%2F%2F2581047078-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252Few2P7M4OjewnGSuQi7Ht%252Fuploads%252Fwkds3bg8Lbs5Rnxpi1nL%252FScreenshot_2024-03-01_at_12.51.24.png%3Falt%3Dmedia%26token%3D83cb095f-4211-4de8-82ca-4d49ed2850df&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=e9df66ab&#x26;sv=2" alt=""><figcaption></figcaption></figure>

***

### Related

* [Conversations API](/docs/developers/apis/conversations-api.md)
* [Customers API](/docs/developers/apis/customers-api.md)
* [Custom fields API](/docs/developers/apis/custom-fields-api.md)
* [Voice API](/docs/developers/apis/voice-api.md)