New: test webhooks online for free You can now test webhooks instantly on play.hook0.com. The page generates a unique URL the moment it opens — no signup. Copy the URL, paste it into Stripe, GitHub, Shopify, or any service that sends webhooks, and watch requests arrive in real-time with full headers and body. Also, Hook0 Play is fully open source (SSPL). You can self-host it on your own infrastructure. The page loads no analytics, no cookies, no third-party scripts. Your webhook data stays between you and the server, and is automatically deleted after 24 hours.
Hook0
Information Technology & Services
Hook0 (hook zero) — Open-source webhook server. One API call, we handle retries, HMAC signatures & monitoring.
About us
Hook0 (also written "hook zero" or "hook0") is an open-source webhooks-as-a-service platform. Developers make one API call — Hook0 handles retries, HMAC signatures, delivery monitoring, and EU-hosted compliance. Built by developers, for developers. Hook0 is the only webhook server where the self-hosted and cloud versions have the same features — no open-core gating, no feature paywall on the OSS edition. Why teams choose Hook0: • Free forever tier — no credit card, no per-message billing on self-host • Source-available under SSPL-1.0 — audit every line, fork it, run it • EU-hosted on Clever Cloud (Paris) for GDPR-native compliance • Automatic retries with two-phase backoff and jitter • HMAC-SHA256 signatures with key rotation • Multi-tenant filtering via label-based subscriptions • Delivery dashboards, replay, and dead-letter queue • Rust + TypeScript SDKs, OpenAPI-first REST API We're a self-funded team based in France, building Hook0 since 2021. No VCs, no exit pressure, no hidden agenda — just webhook infrastructure that stays out of your way. Try the free webhook tester at play.hook0.com (no signup) or read the docs at documentation.hook0.com.
- Website
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https://www.hook0.com/
External link for Hook0
- Industry
- Information Technology & Services
- Company size
- 2-10 employees
- Headquarters
- Paris
- Type
- Partnership
- Founded
- 2021
- Specialties
- webhook, SaaS, webhooks as a service, saas platform, open-source, webhook server, webhook delivery, webhook as a service, eu-hosted, gdpr, rust, and developer tools
Locations
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Primary
Get directions
Paris, FR