nexusphp / mcp-core

v1.0.0 2026-09-04 08:47 UTC

Requires

• php: ^8.3
• amphp/amp: ^3.1.1
• amphp/byte-stream: ^2.1
• nexusphp/assert: ^1.5
• psr/http-message: ^2.0
• psr/log: ^3.0
• revolt/event-loop: ^1.0.8

MIT

• John Paul E. Balandan, CPA

• mcp
• Model Context Protocol
• mcp-sdk

Published on Packagist.org on 2026-09-04 09:49 UTC

README

The protocol foundation shared by the server and client halves of the Nexus MCP SDK: the MCP schema types, the JSON-RPC envelope, the transport contract, and the dispatch kernel both sides build on.

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-core

Most projects want a whole side rather than the foundation alone: nexusphp/mcp-server and nexusphp/mcp-client both pull this package in, and the umbrella nexusphp/mcp ships everything.

What is inside

Namespace	Contents
Nexus\Mcp\Core\Schema	Every spec-defined object, request, notification, and result as a readonly value object or enum
Nexus\Mcp\Core\JsonRpc	Envelope parsing, the method registry, and the JSON-RPC error codes
Nexus\Mcp\Core\Transport	The TransportInterface contract, line-delimited duplex helpers, and InMemoryTransport
Nexus\Mcp\Core\Dispatch	Request correlation and the coroutine bookkeeping shared by both sides
Nexus\Mcp\Core\Handler	The request and notification handler contracts
Nexus\Mcp\Core\Extension	The SEP-2133 extensions primitive
Nexus\Mcp\Core\Auth and Nexus\Mcp\Core\Http	OAuth metadata documents and the HTTP vocabulary shared with the transports
Nexus\Mcp\Core\UriTemplate and Nexus\Mcp\Core\Validation	RFC 6570 templates and the runtime guards
Nexus\Mcp\Core\Exception	The McpExceptionInterface family

Documentation

• Guides, starting with Architecture and Spec compliance.
• API reference.
• Changelog and versioning policy, shared by every component.

License

Released under the MIT License.