Zoho Projects Webhook fails with HTTP Error 0

Hello Zoho Community,

I am pulling my hair out over this one. I have setup a very basic http(s) server that always responds "ok" and code 200 to incoming GET requests. It will accept any parameters, and any path. Really, all it does is say "ok," and log the request to the server.

This service works great from web browsers, from CURL, and from postman. I've tested it in a lot of places with a lot of GET parameters.

However, when I plug this URL as a Zoho Projects Webhook, Zoho fails. Zoho complains for HTTP Error 0.

Error 0 usually means

- client (zoho) error

- client (zoho) firewall blocking or filtering request

- request was cancelled by client code

- other client error

Has anyone run into this error before?

Is there a blacklist at Zoho I might be on? Or do I need to be explicitly whitelisted?

I have tried Zoho with both http and https, neither succeeds.

Any input is greatly appreciated.

Zoho Desk Resources

Desk Community Learning Series
Digest
Functions
Meetups
Kbase
Resources
Glossary
Desk Marketplace
MVP Corner
Word of the Day

Topic Participants
Colin
Monica P

Sticky Posts
Building extensions #10: Fetch customized user inputs, store them globally at the app level, and access them across entities
This data storage concept enables you to store data related to your extension for both entity properties and extension properties. In our previous piece, we looked at how to store data for entities using entity properties. In this post, we'll look at
Building extensions #9: Store, retrieve, and access entity-specific data in widgets using data storage
Data storage - Overview Storing data related to the extension you are working on is essential. It can be saved as key-value pairs for an entity or extension, known as entity and extension properties, respectively. Data can be saved for the following entities
Building extensions #7: Create custom widgets for a simplified end-user experience
Discover the benefits of using widgets! We explored the significance of widgets, prerequisites, and the availability of JS SDK methods as part of our previous post. In this post, let's go over a detailed example of using widgets along with certain Zoho
Building extensions #6: Custom user interfaces with Widgets
Welcome to our post on Widgets for Zoho Projects! In our last post, we explored the significance of the connections feature, showed how to use it, and provided an example use case. In this article, we'll look at the importance of widgets, another feature
Building extensions #5: Integrating applications with Zoho Projects through Connections
In our last post, we discussed the essential features that a Zoho Projects extension can provide. Starting with this post andin every subsequent post going forward, we'll go through each of those features in depth, one by one, with an example use case.