Why webhooks beat polling loops for building production AI email agents

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A software engineer at Nylas has outlined a webhook-driven architecture for building AI email agents, arguing that the common polling approach wastes API calls and adds latency. The proposed pipeline routes inbound mail through a verified ingest endpoint, places it on a queue, and hands it off to workers that drive the AI agent and send replies. The author highlights production concerns often overlooked in tutorials, including idempotency, retries, message ordering, and backpressure. Central to the design is Nylas's Agent Account concept, which gives an AI agent its own dedicated email address and grant, eliminating shared-mailbox coordination issues. The post provides both curl commands and Nylas CLI equivalents for each step, making the end-to-end setup reproducible for developers.

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