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WebAssembly for Proxies (ABI specification)

This repository contains specification of the low-level Application Binary Interface (ABI) and conventions to use between L4/L7 proxies (and/or other host environments) and their extensions delivered as WebAssembly modules.

The event-driven streaming APIs and convenient utility functions were originally developed for the WebAssembly in Envoy project, but they are proxy-agnostic, and consumers can use the same Proxy-Wasm extensions across different proxies.

Specification

The latest and widely implemented version of the specification is v0.2.1.

Implementations

SDKs

• AssemblyScript SDK
• C++ SDK
• Go (TinyGo) SDK
• Rust SDK

Host environments

Servers

• ATS
• Envoy
• NGINX
• MOSN
• OpenResty

Libraries

• C++ Host
• Go Host

Community

There is a Proxy-Wasm on Slack. Feel free to join and engage with the community.