How to Build a Resilient Webhook Relay for AI Agents

Dev.to / 6/18/2026

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Key Points

The article explains why AI agents typically shouldn’t poll APIs and how that makes reliable webhook-based signaling crucial for reacting to real-world events.
It highlights the failure modes of naive webhook handling, including agent downtime, unpredictable third-party retries, request timeouts from slow processing, and lost events on crashes.
It proposes a relay architecture that decouples immediate receipt from later processing by having the relay validate and acknowledge quickly while a queue and worker handle the work asynchronously.
AgentForms is presented as an implementation using two Docker containers (relay and worker) connected via Redis, with the relay designed to return HTTP 200 in under ~100ms.
The relay handler example shows practical considerations like validation (e.g., HMAC), storage, and fast HTTP responses to meet webhook sender expectations.

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