Webhooks
Outbound HTTP callbacks pushed on events.
The provider POSTs event payloads to a URL you register, so you react to changes instead of polling. The single most-requested integration feature in the catalog.
235 API providers on the APIs.io network offer webhooks. The highest-rated are HubSpot, AhaSend, SendGrid, ZoomInfo, Airwallex.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 57 Complete, well-documented, and agent-ready
Strong 55 Solid coverage with minor gaps
Developing 77 Usable, with meaningful gaps to close
Thin 37 Limited public surface area
Emerging 8 Early or largely undocumented
Minimal 1 Almost no public developer surface
What Providers Actually Declared
This feature is a canonical term. These are the free-text strings
providers wrote in their own apis.yml that map onto it.
Showing 40 of 182 declared variants
Work with this as data
Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.