Webhook.site
When visiting Webhook.site, users instantly get a free, unique, random URL and e-mail address. Everything that's sent to these addresses are shown instantly. With this, users can test and debug Webhooks and HTTP requests, as well as create workflows using the Custom Actions graphical builder or WebhookScript, a simple scripting language, to transform, validate and process HTTP requests in a variety of ways – without setting up and maintaining your own infrastructure.