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

# Changes to the API

> Track changes and upgrades to the Fintoc API

Up until now, every change to the Fintoc API has been backwards compatible. Whenever we make a change that is not backwards compatible, we will release a new version of the API to prevent your code from breaking.

### Backwards compatible changes

Fintoc considers the following changes as backwards compatible:

* Add objects to the API.
* Add optional parameters to already existing API endpoints.
* Add new fields to existing objects.
* Change the order of the keys in an object.
* Change the length or format of the IDs and tokens. This includes adding or removing prefixes (like the `acc_` prefix on the ID of the Account Object).
* Change header's field names to uppercase or lowercase. According to [RFC7230](https://www.rfc-editor.org/rfc/rfc7230#section-3.2), header field names are case-insensitive. Note that **field values** are case-sensitive.

<Info>
  **You shouldn't assume the format of IDs nor tokens**

  You should never *parse* an ID or a token to get information out of it. Changes to these fields are considered backwards compatible, so the format can change at any moment. For example, objects created before `2021-05-05` don't have a prefix on their ids.
</Info>