Mcp Phpcs Server

Implemented inpure PHP with zero Composer dependencies. Drop it into any project or run it standalone — it speaks JSON-RPC 2.0 over stdio and works with Claude Desktop, Claude Code, Cursor, and any other MCP-compatible client.

Both tools take a single requiredpath(absolute or project-relative file/directory).

Clone the repository (or copy it into your project):

git clone https://github.com/larspohlmann/mcp-phpcs-server.git

Register it with your MCP client (see below).

Configure via environment variablesorconfig/config.json. Environment variables take precedence.

If no ruleset is provided, the server searches upward from the current working directory for one ofphpcs.xml,phpcs.xml.dist, orruleset.xml.

{ "mcpServers": { "phpcs": { "command": "/absolute/path/to/mcp-phpcs-server/bin/mcp-phpcs", "env": { "MCP_PHPCS_PATH": "/usr/local/bin/phpcs", "MCP_PHPCBF_PATH": "/usr/local/bin/phpcbf", "MCP_PHPCS_RULESET": "/path/to/your/phpcs.xml" } } } }

Then ask your assistant something like"Run phpcs on src/Service/UserService.php and fix what you can."

{ "name": "phpcs_check", "arguments": { "path": "src/Service/UserService.php" } }

The server follows a light Domain-Driven Design layout:

- src/Domain— tool contracts and result value objects
- src/Application— JSON-RPC MCP server and tool registry
- src/Infrastructure— process runner, config, ruleset discovery, tool implementations
- bin/mcp-phpcs— stdio entrypoint

It implements the MCP methodsinitialize,tools/list, andtools/call.

- STDOUT carriesonlyJSON-RPC messages; all logs go to STDERR.
- A non-zero exit code fromphpcsmeans violations were found — it is reported as findings, not treated as a fatal error.

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