---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/70155#article
headline: "70155: Request Is Missing Required HTTP Headers"
url: https://www.twilio.com/docs/api/errors/70155
inLanguage: en
dateModified: 2025-12-12T15:03:58.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 70155: Request Is Missing Required HTTP Headers

Log Level: ERROR

## Description

The JWT received by Twilio along with the request has defined a set of HTTP headers that must be validated. The actual request is missing at least one of those headers. This is a Public Key Client Validation Error.

### Possible Solution:

* Make sure you are using the latest Twilio helper library.
* Make sure the JWT does not declare unnecessary headers.
* For the details on JWTs used as part of Public Key Client Validation, see [the documentation](/docs/iam/pkcv/quickstart)