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I got tired of rewriting webhook verification for every provider

I got tired of rewriting webhook verification for every provider

by ontern·Mar 3, 2026·4 points·2 comments
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AI Analysis

●●●BangerSolve My ProblemShip ItSlick

Replaces 22 lines of crypto boilerplate with 8 lines across 15+ webhook providers.

Strengths
  • •Zero-dependency implementation with genuine multi-platform support (Express, Next.js, Cloudflare Workers, GitHub).
  • •Platform-agnostic abstraction layer lets you swap Stripe→Clerk→GitHub via feature flags, zero redeployment.
  • •Handles three different signature algorithms (HMAC-SHA256, Ed25519, SHA1) transparently — real pain point solved.
Weaknesses
  • •Guaranteed delivery tier requires Upstash account; not self-hostable for the reliability features.
  • •Webhook verification is a solved problem (svix, libraries exist); differentiation relies on ergonomics, not innovation.
Target Audience

Backend developers building webhook handlers on Next.js, Express, Cloudflare Workers, or similar platforms

Similar To

Svix · Hookdeck · Inngest

Post Description

Every webhook provider has a different signature algorithm and header format and you end up rewriting the same verification boilerplate for each one. Tern absorbs that pain.

Zero-dependency TypeScript SDK. Handles signature verification for Stripe, Polar, Clerk, Shopify, Sentry, Grafana and 15+ more. Works with Express, Next.js and Cloudflare Workers.

Also now Tern opens source supports complete inbound webhook event reliability layer including Queuing, retries, deduplication, replay, dead letter queue and Slack/Discord alerting — all opt-in,

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