---
title: "Introspect the credential"
description: "The workspace this credential acts on, how the request authenticated (an API key, an OAuth access token from an MCP sign-in, or the dashboard session), whether it may write, and for a key its id and expiry. Run it first: a read key answers 403 read_only_key on every write, and a wrong workspace is the classic scripting mistake."
canonical: https://docs.mentio.dev/api/auth/whoami
markdown: https://docs.mentio.dev/api/auth/whoami.mdx
---

# Introspect the credential

`GET /v1/whoami`

The workspace this credential acts on, how the request authenticated (an API key, an OAuth access token from an MCP sign-in, or the dashboard session), whether it may write, and for a key its id and expiry. Run it first: a read key answers 403 read_only_key on every write, and a wrong workspace is the classic scripting mistake.

## Responses

- 200: The credential
- 401: Missing or invalid API key

Full schemas: https://api.mentio.dev/v1/openapi.json. Conventions: https://docs.mentio.dev/conventions.mdx