---
title: "Resolve an API key to its owner"
method: GET
path: "/whoami"
tags: ["Account"]
---

# Resolve an API key to its owner

`GET /whoami`

## Request

- Base URL: `https://studio.fintechstudios.com/api/v1`
- URL: `https://studio.fintechstudios.com/api/v1/whoami`
- Auth: API key in header `X-API-Key`

Returns the identity of the Studio user that owns the presented API key. `user_id` is the Studio users.id — the same value POST /api/system/provision-app-key returns, and identical across every key belonging to that user. Not metered: no credits are charged and the call succeeds even for a user with no credit account. Unlike other v1 endpoints this authenticates by API key only — a session cookie will not satisfy it, because the endpoint's purpose is to identify the presented key.

## Response `200`

Key owner identity

- object
  - `data` object
    - `user_id` string: Studio user id (UUID)
    - `email` string, nullable
    - `name` string, nullable: Display name; null when the user has no name on file
    - `first_name` string, nullable
    - `last_name` string, nullable
  - `meta` Meta
    - `request_id` string
    - `credits_used` integer
    - `credits_remaining` integer
    - `rate_limit` object
      - `limit` integer
      - `remaining` integer
      - `reset` integer

## Other responses

- `401`: Missing, invalid, or revoked API key
- `429`: Rate limit exceeded

---

[API](https://skmtc.dev/fintechstudios/apis/fts-studio-api.md) · [All operations](https://skmtc.dev/fintechstudios/apis/fts-studio-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fintechstudios/apis/fts-studio-api/revisions/4886597d1d96?raw)