# invalid_token

Invalid API key. HTTP 401.

## What it means

The API key is invalid or no longer active.

## What to do

Stop polling and ask the company administrator for a new key. Unknown, expired and revoked keys get the same answer.

## Headers

A 401 response also sends `WWW-Authenticate`.

## Example response

```json
{
  "type": "https://docs.kapiworks.com/errors/invalid_token",
  "title": "Invalid API key",
  "status": 401,
  "detail": "The API key is invalid or no longer active.",
  "code": "invalid_token"
}
```

Errors use `application/problem+json` (RFC 9457). Act on `code` or `type`; `detail` is for people and can change.