Free tools for coding agents

Fix the two most common setup headaches: MCP config formats and rules files that differ in every agent. Everything runs in your browser.

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MCP config generator

Pick a server and your agents. Get Claude Code JSON + CLI, Codex config.toml, Cursor mcp.json, VS Code "servers" and Antigravity mcp_config.json.

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Rules-file converter

Write project rules once; get AGENTS.md, CLAUDE.md, .cursor/rules/*.mdc and copilot-instructions.md.
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What changed in Claude Code, Codex, Cursor, Copilot and Antigravity: limits, pricing, new MCP servers and the tools that actually work, with honest notes.

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