# Token introspection — API reference

> Who am I? What can this key do? The first call to make. REST endpoints with request and response fields, examples in curl, JavaScript, Python, Go and PHP, and an in-browser Try it console.

Source: https://upfour.io/docs/api/me

[Developers](https://upfour.io/docs/api.md)/Platform

Who am I? What can this key do? The first call to make.

Base URL `https://app.upfour.io/v1`. Send your key as `Authorization: Bearer <key>`; every key acts on your real Company, so [test without paging anyone](https://upfour.io/docs/api/testing.md). New here? Start with the [quickstart](https://upfour.io/docs/api/quickstart.md). The examples read the key from `UP4_API_KEY`.

## Everyday

[GET **Inspect the current token** /me](https://upfour.io/docs/api/me/inspect-the-current-token.md)