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POST
Create Webhook Endpoint

Authorizations

Authorization
string
header
required

API key as Bearer token. Use an account key (mfx_acct_...) for /account/* endpoints, and an environment key (mfx_test_... for sandbox, mfx_live_... for live) for /environment/*, /faxes, /webhooks, and /events.

Body

application/json
url
string<uri>
required
Maximum string length: 2048
description
string | null
Maximum string length: 255
events
enum<string>[] | null
Maximum array length: 6
Available options:
fax.queued,
fax.sending,
fax.delivered,
fax.failed,
balance.low,
balance.topup

Response

WebhookEndpointResource

data
WebhookEndpointResource · object
required
signing_secret
string
required
Last modified on May 11, 2026