v52

OpenAPI 3.1.0raw.githubusercontent.com2026-07-311,1941,9384.1 MB

Callbacks

Replaced Link Click

This webhook uses Telnyx headers (telnyx-timestamp, telnyx-signature-ed25519) that are compatible with Standard Webhooks specification for SDK generation. Custom validation logic can map these to standard webhook-timestamp and webhook-signature equivalents. See https://github.com/standard-webhooks/standard-webhooks for details.

postWebhookreplacedLinkClick

Headers

telnyx-timestampinteger required

Unix timestamp for replay attack prevention

Unix timestamp (seconds since epoch) of when the webhook was sent - compatible with webhook-timestamp

telnyx-signature-ed25519string required

Ed25519 signature of timestamp|payload for verification

Base64 encoded Ed25519 signature for webhook verification - compatible with webhook-signature

Payload

Example payload

{
  "data": {
    "message_id": "7ee4241c-f127-47e5-9c34-3aac291f8058",
    "record_type": "link_clicked",
    "time_clicked": "2019-04-01T14:45:45.450Z",
    "to": "18445550001",
    "url": "https://telnyx.com"
  }
}

Response

The server must return an HTTP 200, otherwise we will reattempt delivery at the failover webhook URL.