> 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 . {% 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`
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` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://help.tacinsight.com/fast-weigh-knowledge-base/references/api-documentation/graphql-v2-api/authentication.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.