Launch HN: Svix (YC W21) – Webhooks as a Service

Hey everyone, my name is Tom, and I'm the founder of Svix ( https://www.svix.com ) - previously known as Diahook. Svix makes it easy for developers to send webhooks from their service using a simple API. Think Twilio or SendGrid but for webhooks. Webhooks are how servers notify each other of events, so they are a key component of many APIs such as Stripe, Shopify, Slack, Dropbox and Github. They look easy to implement (just a POST request), but they come with a variety of challenges. For example, customer endpoints fail or hang much more often than you would think, so you would need to implement retries. You need to make sure such failures don't clog your send queue or the rest of your system. The webhook system is an additional system separate from your normal web server that needs to be scaled and monitored separately. There are also a variety of security implications such as SSRF, replay attacks, and attackers sending fake webhooks to your customers (so make sure