Mcp Server R Counter
Smoke-test MCP wiring in Claude Code or Cursor with a trivial tool that counts letter r occurrences in any string.
Overview
mcp-server-r-counter is a MCP server for the Build phase that counts the number of r characters in a user-supplied query for MCP plumbing tests.
What is this MCP server?
- Single-purpose tool: count r letters in a query string
- PyPI package mcp-server-r-counter v0.0.3
- stdio transport for local agent experiments
- Low-risk sandbox for MCP config mistakes
- Useful regression check after agent upgrades
- Server version 0.0.3
- PyPI identifier mcp-server-r-counter with stdio transport
- Single documented capability: count r characters in a query
What problem does it solve?
New MCP setups fail silently until you debug with a tiny tool that proves stdio, packaging, and tool calls work.
Who is it for?
Solo builders learning MCP on PyPI who want a zero-domain tool to validate agent configuration.
Skip if: Production apps needing real business data, security reviews, or multi-tool orchestration.
What do I get? / Deliverables
After install, you get deterministic r-count responses that confirm your agent’s MCP pipeline end to end.
- Working stdio MCP tool invocation from your agent
- Numeric r-count result for arbitrary test strings
- Baseline for swapping in production MCP servers
Recommended MCP Servers
Journey fit
Build agent-tooling is where you validate MCP transports and tool schemas before hooking production APIs. Agent-tooling captures minimal reference servers used to learn stdio MCP and PyPI packaging, not business integrations.
How it compares
Developer Tools MCP demo, not a skills.sh workflow skill or production API connector.
Common Questions / FAQ
Who is io.github.guanqun-yang/mcp-server-r-counter for?
Developers testing MCP for the first time or verifying agent upgrades with a predictable, side-effect-free tool.
When should I use io.github.guanqun-yang/mcp-server-r-counter?
Use it during Build agent-tooling when you need to confirm stdio MCP and PyPI launch before swapping in real integrations.
How do I add io.github.guanqun-yang/mcp-server-r-counter to my agent?
Install mcp-server-r-counter from PyPI, point your MCP stdio config at the installed entrypoint, restart the agent, and ask it to count r’s in a sample phrase.