> ## Documentation Index
> Fetch the complete documentation index at: https://alltick.co/apis/llms.txt
> Use this file to discover all available pages before exploring further.

# Common Standard Header Description

> This page defines the universal standard headers used by AllTick market data APIs, detailing the common HTTP and WebSocket header fields, meanings, and examples, so developers can consistently set token, language, compression, and other shared headers when accessing realtime forex, stock, and crypto data.

> **[HTTP Common Standard Header](https://alltick.co/apis/apis/en/integration-process/http-common-standard-headers.md)**

> **[WebSocket Common Standard Header](https://alltick.co/apis/apis/en/integration-process/websocket-common-standard-header.md)**


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