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The @agentclientprotocol/sdk npm package provides implementations of both sides of the Agent Client Protocol that you can use to build your own agent server or client. To get started, add the package as a dependency to your project:
Depending on what kind of tool you’re building, you’ll start with either the agent() or client() function to register typed handlers for the ACP methods you support and connect to your counterpart. The examples directory contains runnable implementations of both sides that can be driven from your terminal or from an ACP Client like Zed, making them great starting points for your own integration! Browse the TypeScript library reference for detailed API documentation.

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Deprecated classes

Earlier versions of the library were built around the AgentSideConnection and ClientSideConnection classes. These classes are now deprecated in favor of the fluent agent() and client() APIs. They remain available for backwards compatibility, but new integrations should use the fluent API as shown in the examples.

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Users

For a complete, production-ready implementation of an ACP agent, check out Gemini CLI.