"Free APIs and services without commercial fees" matching MCP connectors:

AI Worlds CLI KnowledgeA

com.claude-world

Source-checked CLI guides and model-aware planning for Claude Code, Codex, and Grok Build.

Oh My Posh ValidatorA

dev.ohmyposh

Validate oh-my-posh configurations and segment snippets against the official schema.

mcpAOAuth

dev.aicommander

Remote shell and detached long-running jobs on your own machines — no SSH, open ports or VPN.

D3vToolsA

tools.d3v

MCP server for 200+ developer utilities — discover and execute tools through a unified API.

Your workspace as agent tools — docs, canvases, slides, sheets, projects, tickets, and a shell.

One command to validate, transform, and deduplicate — chain GoldenCheck + Flow + Match.

KodyOAuth

io.github.kentcdodds

Personal assistant MCP server with search, execute, packages, jobs, secrets, and integrations.

Securely work with files, terminals, screenshots, search, and processes on computers you explicitly pair with ReMCP.

A paid remote MCP for CLI tool MCP, built to return verdicts, receipts, usage logs, and audit-ready

Remote MCP for Android CLI agent build gate, structured receipts, audit logs, and reviewer-ready evi

QuLab MCP remote server (Streamable HTTP) for computational science and lab tools.

Execute PowerShell commands securely with controlled timeouts and input validation. Retrieve syste…