Source type

Mux Source Configuration

Mux sources receive video, live stream, asset, track, and upload webhooks with timestamped Mux signatures.

MUXPOST, PUT, PATCH, DELETEWebhook Signing SecretContent and data
Mux webhook signature documentationAll source types
Mux sends webhook traffic to a FastHook source, FastHook validates the provider contract, records the request, and routes accepted events through connections to destinations.MuxProviderPOST, PUT, PATCH, DELETESignedFastHookSource URLMUXProvider credentialsignatureVerify before queue401 on auth failure405 on wrong methodAcceptedRequestverified: trueConnections route the accepted request to destinationsFilters, transformations, retries, replay, and destination signatures stay downstream from source verification.

Mux configuration

Create a Mux source, keep POST and PUT and PATCH and DELETE enabled, and provide the configured Webhook Signing Secret values for provider signature. FastHook uses these settings to validate each Mux delivery before it enters the routing workflow.

Source Type

MUX

Allowed methods

POST, PUT, PATCH, DELETE

Authentication

Provider signature

Credential fields

Webhook Signing Secret

Mux source config
{
  "type": "MUX",
  "config": {
    "auth_type": "PROVIDER_SIGNATURE",
    "auth": {
      "provider": "MUX",
      "webhook_signing_secret": "provider-secret"
    },
    "allowed_http_methods": ["POST","PUT","PATCH","DELETE"]
  }
}

Mux request contract

FastHook verifies mux-signature by signing timestamp + '.' + raw body with HMAC-SHA256.

POSTPUTPATCHDELETE

Mux headers

Preserve mux-signature when sending Mux test deliveries. FastHook evaluates this request context before accepting the payload, so missing or modified values remain visible as rejected requests instead of routed events.

mux-signature

Contains t timestamp and v1 HMAC-SHA256 signature.

Mux setup

  1. Create a Mux webhook endpoint using the FastHook Source URL.
  2. Paste the Mux signing secret into FastHook.
  3. Route by Mux event type such as video.asset.ready or video.live_stream.active.

Continue with Mux