Webhooks are the dominant HTTP pattern for asynchronous, event-driven integration, and the Webhooks area on APIs.io indexes the providers that deliver, ingest, transform, retry, and inspect them. The area spans a provider_count of 273 across the network — an index and topic collection covering the full lifecycle of an event once it leaves one system and heads for another.
Standout providers by score band
The area’s highest-rated providers cluster at the top of the exemplar and strong bands:
| Provider | APIs | Score band | Composite |
|---|---|---|---|
| Svix | 4 | exemplar | 73.5 |
| Hookdeck | 12 | exemplar | 72.1 |
| Vercel | 5 | exemplar | 71.2 |
| Fastly | 23 | exemplar | 70.2 |
| Knock | 14 | strong | 69.3 |
| Composio | 8 | strong | 69.2 |
| Storyblok | 4 | strong | 68.8 |
| Buildkite | 5 | strong | 67.8 |
| Square | 37 | strong | 65.8 |
| Convoy | 1 | strong | 65.5 |
What is telling is who leads. Svix, Hookdeck, and Convoy are dedicated webhook infrastructure — services whose entire job is making event delivery reliable, verifiable, and debuggable. They rate as exemplar and strong not because they have the biggest API surface (Svix and Convoy are tiny by endpoint count) but because they treat webhooks as a product with retries, signatures, and inspection built in.
What the area says about event-driven APIs
Two signals stand out. First, webhooks have specialized. The presence of Svix, Hookdeck, and Convoy — plus Knock for notification delivery and Composio for agent-facing event routing — shows that “just POST to a URL” grew into an infrastructure category with senders, gateways, and receivers as distinct roles.
Second, the pattern is now table stakes for platforms. Fastly, Vercel, Square, and PayPal carry webhooks as one feature among many, which is why the area’s related neighbors are Integrations, Observability, Embedded iPaaS, and SaaS Management. Events are the connective tissue those categories all depend on.
Takeaway
If you are building anything event-driven, the Webhooks area is the shortlist: dedicated infrastructure at the top, platform webhooks filling out the middle, and score bands that reward reliability over surface area. Browse every provider at apis.io/areas/webhooks/, and the full topic collection lives at webhooks.apievangelist.com.