---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/52101#article
headline: "52101: Invalid GCM Api Key or FCM Secret"
url: https://www.twilio.com/docs/api/errors/52101
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 52101: Invalid GCM Api Key or FCM Secret

Log Level: ERROR

## Description

### Possible causes

* The GCM API Key or FCM Secret provided is invalid.

### Possible solutions

* Provide a valid GCM API Key or FCM Secret