Can I add a new first-class provider?

Open an issue with the provider's signing details and we'll prioritise it. Until then, the generic provider gets you 90% of the value.

Integration · Custom HMAC

Custom HMAC webhook gateway

Need to ferry webhooks from a provider Charon doesn't natively support? The generic provider type accepts any HMAC-signed webhook (X-Charon-Signature, X-Webhook-Signature, X-Signature) and the same DLQ, retry, and replay machinery applies — no custom code needed.

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Why Charon Gate for Custom HMAC

Bring-your-own-secret HMAC verification — works with any system that signs the body with HMAC-SHA256.
Skip verification for unsigned legacy webhooks (audit-logged so you know which events were not verified).
Same retention, redaction, and replay semantics as the first-party providers.

How verification works

Header: X-Charon-Signature (or X-Webhook-Signature / X-Signature)
Algorithm: HMAC-SHA256 of the raw body, hex-encoded with optional `sha256=` prefix
Upstream docs: /docs

Example Custom HMAC events

Charon Gate is event-shape agnostic — these are typical Custom HMAC event types our customers route through us today.

custom.event.createdcustom.event.deleted

FAQ

Can I add a new first-class provider?: Open an issue with the provider's signing details and we'll prioritise it. Until then, the generic provider gets you 90% of the value.

Ready when you are

Front your Custom HMAC webhooks with Charon Gate in 90 seconds.

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