--- title: Webhooks Are Harder Than They Seem | daily.dev description: Building a production-grade webhook system is far more complex than firing off an HTTP POST request. Key challenges include reliability (retries with... canonical: https://daily.dev/posts/webhooks-are-harder-than-they-seem-hda9b6f4a twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Webhooks Are Harder Than They Seem | daily.dev og:description: Building a production-grade webhook system is far more complex than firing off an HTTP POST request. Key challenges include reliability (retries with... og:url: https://daily.dev/posts/webhooks-are-harder-than-they-seem-hda9b6f4a og:image: https://api.daily.dev/og/posts/HDa9B6f4a.png og:image:alt: Webhooks Are Harder Than They Seem og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Webhooks Are Harder Than They Seem **[Svix Blog](https://daily.dev/sources/svix)** · 11 min read · 0 upvotes · 0 comments ## Summary Building a production-grade webhook system is far more complex than firing off an HTTP POST request. Key challenges include reliability (retries with exponential backoff, at-least-once delivery), security (signature verification, SSRF prevention, flooding protection), scalability (webhook load can spike orders of magnitude beyond normal traffic, especially during retries), quality of service (avoiding noisy-neighbor effects), observability (delivery logs and internal monitoring), and developer experience (self-serve UIs, multi-endpoint fanout, throttling, long timeouts). GitHub's lack of webhook retries and past webhook-related outages are cited as cautionary examples. The piece closes by promoting Svix as a managed solution for these problems. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why do webhooks need retries with exponential backoff instead of just firing once? HTTP calls fail regularly due to server downtime, timeouts, and network issues, so a webhook system needs automatic retries to ensure successful delivery. An exponential backoff schedule spanning a couple of days both increases the odds of eventual delivery and reduces the delay before a retry succeeds. Missing even one webhook out of ten thousand can make an integration unreliable for a receiving service that depends on it as part of a core workflow. _Teams designing dependable event delivery can track webhook reliability patterns and pitfalls on daily.dev._ ### Why can webhook traffic scale much faster than normal API load during an outage? Failed webhook deliveries compound because retries stack on top of ongoing new events. In one scenario, 100 API requests per second generating 4 events each becomes 400 events per second; if consumers take 5 seconds to process, load can climb to 1,600 events by the fourth second. If a customer or region goes down and processing time jumps to 15 seconds, load can reach 5,600 events per second before retries even kick in, ballooning to 11,000-22,000 events per second with retries factored in. _Engineers sizing infrastructure for bursty webhook traffic can find scalability breakdowns like this on daily.dev._ ### What is server-side request forgery (SSRF) risk in webhook systems? SSRF occurs when an attacker exploits a system's ability to set a target URL for webhook delivery, tricking the sending server into making requests to internal resources such as other microservices or internal systems. Because webhook senders let the receiving party specify the destination URL, this vulnerability is inherent to the webhook model and must be explicitly guarded against by the sending service. _Developers hardening webhook senders against SSRF can surface security-focused deep dives via daily.dev._ ## Similar posts on daily.dev - [The valley of webhooks](https://daily.dev/posts/the-valley-of-webhooks-6ekxclvor) · Hacker News · 0 upvotes · 0 comments - [Your Webhook Endpoint Is a Tiny Distributed System](https://daily.dev/posts/your-webhook-endpoint-is-a-tiny-distributed-system-izgpxyxum) · Ruby Flow · 0 upvotes · 0 comments - [Realtime AI Agent - A Deep Dive](https://daily.dev/posts/realtime-ai-agent---a-deep-dive-q4v3vciti) · System Design Newsletter · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#career](https://daily.dev/tags/career), [#architecture](https://daily.dev/tags/architecture) [View this post on daily.dev](https://daily.dev/posts/webhooks-are-harder-than-they-seem-hda9b6f4a) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Webhooks Are Harder Than They Seem","url":"https://daily.dev/posts/webhooks-are-harder-than-they-seem-hda9b6f4a","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/webhooks-are-harder-than-they-seem-hda9b6f4a"},"datePublished":"2026-08-23T07:21:14.286Z","dateModified":"2026-08-23T07:23:16.591Z","description":"Building a production-grade webhook system is far more complex than firing off an HTTP POST request. 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