---
title: "TeXML Conference Join"
method: POST
path: "TexmlConferenceJoinWebhook"
tags: ["Callbacks"]
---

# TeXML Conference Join

`POST TexmlConferenceJoinWebhook` (webhook)

Webhook sent when a participant joins a TeXML conference.
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.

## Headers

- `telnyx-timestamp` integer, required: Unix timestamp for replay attack prevention
- `telnyx-signature-ed25519` string, required: Ed25519 signature of timestamp|payload for verification

## Payload `application/x-www-form-urlencoded`

- TexmlConferenceJoinWebhookSchema: Webhook sent when a participant joins a TeXML conference.
  - `AccountSid` string, required: The unique identifier of the account (user_id).
  - `CallSid` string, required: The unique identifier of the call that joined.
  - `CallSidLegacy` string, required: Legacy call identifier, same as CallSid.
  - `CallingPartyType` string: The type of calling party (conditional, only present if available in event).
  - `ConferenceSid` string, required: The unique identifier of the conference.
  - `ConnectionId` string, required: The unique identifier of the connection.
  - `FriendlyName` string, required: The friendly name of the conference.
  - `From` string: The phone number or SIP address of the caller (conditional, only present if available in event).
  - `FromSipUri` string: The SIP URI of the caller (conditional, only present if available in event).
  - `ParticipantLabel` string: The label of the participant (conditional, only present if available in event).
  - `SequenceNumber` integer, required: The sequence number of the event.
  - `StatusCallbackEvent` 'participant-join', required: The event that triggered the callback.
  - `Timestamp` string, date-time, required: The UTC timestamp when the webhook was generated.
  - `To` string: The phone number or SIP address that was called (conditional, only present if available in event).
  - `ToSipUri` string: The SIP URI of the callee (conditional, only present if available in event).

## Acknowledgement `200`

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

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api.md) - [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api/llms.txt) - [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api/revisions/0f17b8167873?raw)