---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/50424#article
headline: "50424: One of the JSON requests for participant creation is invalid."
url: https://www.twilio.com/docs/api/errors/50424
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 50424: One of the JSON requests for participant creation is invalid.

Log Type: APPLICATION

Log Level: ERROR

## Description

One of the requests in provided participants list is not a valid JSON object.

### Possible causes

You are attempting to use invalid JSON object in the list of requests to create participants. If Conversations API is used it means that one of form parameters 'Participant' contains invalid JSON.

### Possible solutions

Validate that all the requests in the list of participants are strings that contain valid JSON objects. Make amendments to the requests that are not valid.