---
title: "TeXML HTTP Request"
method: POST
path: "TexmlHttpRequestWebhook"
tags: ["Callbacks"]
---

# TeXML HTTP Request

`POST TexmlHttpRequestWebhook` (webhook)

Webhook sent as response to an HTTP Request instruction.
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`

- TexmlHttpRequestWebhookSchema: Webhook sent to the action URL after an HttpRequest instruction completes (when async="false"). This webhook contains standard call parameters plus any custom fields extracted from the HTTP response via Field mappings defined in the Response/Content section.
  - `AccountSid` string, required: The unique identifier of the account (user_id).
  - `CallerId` string: The display name of the caller (conditional, only present if caller_id_name is set).
  - `CallSid` string, required: The unique identifier of the call (call_control_id).
  - `CallSidLegacy` string, required: Legacy call identifier, same as CallSid.
  - `ConnectionId` string, required: The unique identifier of the connection.
  - `From` string, required: The phone number or SIP address of the caller.
  - `To` string, required: The phone number or SIP address that was called.

## 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)