# Document History for the API Gateway WebSocket and HTTP API Reference
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The following table describes major updates to the Amazon API Gateway WebSocket and HTTP API Reference.
+ **Latest documentation update: **June 3, 2025

| Change | Description | Date | 
| --- |--- |--- |
| [Routing rules](#doc-history) | Added support for routing rules. | June 3, 2025 | 
| [IP address types](#doc-history) | Added support for IP address types for APIs and domain names. | March 28, 2025 | 
| [Mutual TLS authentication](#doc-history) | Added support for mutual TLS authentication for HTTP APIs. | September 17, 2020 | 
| [HTTP API Lambda and IAM authorizers](#doc-history) | Added support for Lambda and IAM authorizers for HTTP APIs. | September 9, 2020 | 
| [HTTP API Amazon service integrations](#doc-history) | Added support for Amazon service integrations for HTTP APIs. To learn more, see [Integration](https://docs.amazonaws.cn/apigatewayv2/latest/api-reference/apis-apiid-integrations-integrationid.html). | August 20, 2020 | 
| [HTTP API export](#doc-history) | Added support for exporting definitions of HTTP APIs. To learn more, see [ExportedAPI](https://docs.amazonaws.cn/apigatewayv2/latest/api-reference/apis-apiid-exports-specification.html). | April 20, 2020 | 
| [HTTP APIs](#doc-history) | General availability release of HTTP APIs. | March 12, 2020 | 
| [HTTP APIs](#doc-history) | Beta release of HTTP APIs. | December 4, 2019 | 
| [Major release](#doc-history) | Initial documentation release. | November 29, 2018 |