> For the complete documentation index, see [llms.txt](https://help.tacinsight.com/fast-weigh-knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.tacinsight.com/fast-weigh-knowledge-base/references/api-documentation/graphql-v2-api/authentication.md).

# Authentication

{% hint style="info" %}
The GraphQL API is an additional feature. If you would like to add the GraphQL Api to your Fast Weigh subscription, contact us at *865-219-2980* or <support@tacinsight.com>.
{% endhint %}

## **Endpoint**

All GraphQL APIs share a single endpoint

[`https://graphql.fast-weigh.com/`](https://graphql.fast-weigh.com/)

## Authentication

The Fast-Weigh GraphQL API service uses Bearer Authentication with the token being your API key from the Web Portal. The token should be included with every call.

Regardless of the tooling that you use, the final Authorization header should end up looking something like this: `Bearer API-KEY-HERE`

<figure><img src="/files/u5cGuHpLZtE1dcLMclk5" alt=""><figcaption></figcaption></figure>

For additional information on setting up authentication in the recommended tooling, check out [Tooling](/fast-weigh-knowledge-base/references/api-documentation/graphql-v2-api/tooling.md)

## Headers

Generally, most tooling will set the headers for you. The only non-authorization header that is required for the GraphQL API is `Content-Type: application/json`