---
title: 2004: Credential invalid. | API Docs
description: A valid bearer credential is required.
---

**HTTP status:** `401`.

The Authorization header is missing, malformed, duplicated, or names a key or delegated capability credential that is unknown, expired or revoked. Nothing was read or changed.

## Troubleshooting

- Send exactly one Authorization: Bearer header with a current partner API key or capability credential.

## Related

- [Authentication](/channel/whatsapp/getting-started/authentication/index.md)