---
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"@id": https://www.twilio.com/docs/api/errors/20008#article
headline: "20008: Test Credentials"
url: https://www.twilio.com/docs/api/errors/20008
inLanguage: en
dateModified: 2025-12-18T21:40:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 20008: Test Credentials

Log Level: ERROR

## Description

Currently only a handful of API resources can be tested with your test credentials. Trying to authenticate with your test credentials to other resources will return a Forbidden error message. For a full list of supported resources, please see our [Test Credentials](/docs/iam/test-credentials) page.