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Informations about the package simplemcp

GitHub Tag Code Style License Last Commit PHP Version Support Packagist Downloads

🐘 simplemcp 🐘

simplemcp is a simple php mcp server. it auto-discovers tool classes via reflection, loads them from a directory you point it at, and authenticates requests via a static bearer token or rotating totp codes (rfc 6238).

installation

configuration

authentication

static mode

totp mode

MCP_TOKEN is a base32-encoded shared secret (rfc 6238). the bearer is a fresh 6-digit totp code (30-second window, ±1 step tolerance). the server implements the algorithm natively, no extra library needed. on the client (python/fastmcp):

usage

configure the constructor at the bottom of mcp-server.php:

adding tools

note: simplemcp uses the same #[McpTool] and #[Schema] attribute syntax as php-mcp/server. existing tool classes can be migrated by replacing use PhpMcp\Server\Attributes\McpTool; with use vielhuber\simplemcp\Attributes\McpTool; (and the same for Schema).

note: throw \RuntimeException (or any \Throwable) to signal errors. simplemcp catches these automatically and returns them as a structured mcp error response with isError: true and the exception message as text. this is the recommended pattern for invalid input or missing resources — do not return null or false.

mcp server

http mode (recommended for remote servers)

stdio mode (local, via php cli, no auth needed)

apache configuration


All versions of simplemcp with dependencies

PHP Build Version
Package Version
Requires php Version >=8.3
vlucas/phpdotenv Version *
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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