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Developers/Platform

Webhook subscriptions

Outbound, signed webhooks — subscribe, test, inspect deliveries, redeliver.

Base URL https://app.upfour.io/v1. Send your key as Authorization: Bearer <key>; every key acts on your real Company, so test without paging anyone. New here? Start with the quickstart. The examples read the key from UP4_API_KEY.

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Deliveries

Control