Nexus MCP SDK: Client

The client half of the Nexus MCP SDK: a ClientBuilder, a Client with one typed method per MCP capability, transports for spawned stdio servers and Streamable HTTP endpoints, and the OAuth authorization flow with pluggable token stores.

Important

This repository is a read-only subtree split of NexusPHP/mcp. Open issues and pull requests there. Anything opened here is closed automatically with the same pointer.

Installation

composer require nexusphp/mcp-client

This pulls in nexusphp/mcp-core. The umbrella nexusphp/mcp ships the server and the official extensions alongside it.

What is inside

Namespace	Contents
Nexus\Mcp\Client	ClientBuilder, Client, and ClientContext
Nexus\Mcp\Client\Transport	StdioClientTransport, StreamableHttpClientTransport, and SupervisedTransport
Nexus\Mcp\Client\Auth	The authorization coordinator, grant strategies, PKCE, and the token and registration stores
Nexus\Mcp\Client\Dispatch and Nexus\Mcp\Client\Handler	Request deadlines, progress, and the notification handler registry
Nexus\Mcp\Client\Subscription	The subscriptions/listen consumer
Nexus\Mcp\Client\Extension and Nexus\Mcp\Client\Time	The outbound extension gate and the cancellable delay

Documentation

• Getting started and the Client API overview.
• Transports and the client authorization guide.
• API reference.
• Changelog and versioning policy, shared by every component.

License

Released under the MIT License.