Subscribe a backend endpoint to Uploadcare webhooks and verify incoming notifications are authentic
domain: uploadcare.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
In the Uploadcare dashboard (or via the webhooks REST API), register a webhook endpoint URL and select which project events (e.g. file uploaded) should trigger it
Optionally configure a signing secret for the webhook so Uploadcare includes a verifiable signature header with each delivered payload
On receipt, validate the signature against the shared secret before trusting the payload's contents, since webhook URLs are otherwise unauthenticated public endpoints
Return a 2xx HTTP status promptly to acknowledge receipt — Uploadcare treats any non-2xx response (or timeout) as a failed delivery
Register multiple endpoints for the same event, or the same endpoint for multiple events, as needed, since both configurations are supported independently
Known gotchas
Only 2xx responses count as success; a slow endpoint that times out, or one returning e.g. a 500 during a deploy, is treated as a failed delivery — build idempotent, fast-acknowledging handlers
Which events are available to subscribe to depends on the API version chosen when creating the webhook, so older/newer API versions can expose different event sets
Without a signing secret configured, there's no way to distinguish a genuine Uploadcare payload from a forged POST to the same endpoint URL — always enable signing for anything triggering real actions
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