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

# API Versioning

Understanding and effectively managing versions is crucial to maximize benefits from APIs. Our API versioning system is primarily governed through the *'Accept'* HTTP header, which can be modified as required to access different versions.

### How to Use API Versioning

When making a request to our API, specify the required API version in the 'Accept' HTTP header. Here is how you can do it:

**Version 1 (Default Version)**

If you want to use version 1, set your 'Accept' header to either 'application/json' or 'application/json;version=1'. Below are the examples:

```http
Accept: application/json
```

or

```http
Accept: application/json;version=1
```

**Version 2 and Beyond**

If you wish to use version 2 or any version beyond, indicate it in the 'Accept' header as 'application/json;version=2' for version 2, and so forth. Here is an example for version 2:

```http
Accept: application/json;version=2
```

### Things to Remember

* **Varied Endpoint Compatibility**: Please note that not all endpoints support multiple versions. Consequently, use your preferred version wisely.