Athanor by arbastro
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MCP server

Use Athanor's chemistry engine from Claude, ChatGPT, Cursor and other assistants. Free, no account.

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  1. 1 · ConceptAthanor MCP serverThe Athanor MCP server lets any AI assistant that supports MCP convert, name, draw, check and screen structures, look compounds up, and build and edit a whole Athanor document, with Athanor's own engine. It is free and needs no account.
  2. 2 · How-toConnect your AI assistantAdd the server address https://mcp-athanor.arbastro.com/mcp to your assistant as a remote MCP server or connector, turn it on, and ask it to name CCO. There is nothing to install and no key.
  3. 3 · How-toHow to use Athanor in ChatGPTAdd Athanor as a ChatGPT connector in developer mode: name, URL, no authentication. Then ask ChatGPT to name or check a structure.
  4. 4 · How-toHow to use Athanor in ClaudeAdd Athanor as a custom connector in claude.ai or the Claude desktop app with one URL, then turn it on in a chat.
  5. 5 · How-toHow to use Athanor in Claude CodeOne command adds Athanor's chemistry tools to Claude Code, per project or for every project, or add them in .mcp.json. Free, no account.
  6. 6 · How-toHow to use Athanor in Codex CLITwo lines in ~/.codex/config.toml give Codex CLI Athanor's chemistry tools. Restart Codex and ask it to name a structure.
  7. 7 · How-toHow to use Athanor in Gemini CLIOne command or a settings.json entry gives Gemini CLI Athanor's chemistry tools. Trust the folder so the server loads.
  8. 8 · How-toHow to use Athanor in CursorAdd Athanor to ~/.cursor/mcp.json, or a project's .cursor/mcp.json, for chemistry tools in Cursor's agent. Free, no account, no key.
  9. 9 · How-toHow to use Athanor in VS CodeAdd Athanor as an HTTP MCP server for GitHub Copilot in VS Code, from the Command Palette or a .vscode/mcp.json file.
  10. 10 · ReferenceToolsThe server has 20 tools. Engine tools such as convert, name, properties, depict, check and screen take a structure and answer. Document tools create an Athanor document, edit it atom by atom, and render or export it.
  11. 11 · How-toMCP troubleshootingMost problems are a connector that is not turned on for the chat, a terminal client that was not restarted or does not trust the folder, or the limit of 60 calls a minute from one address.
  12. 12 · How-toHow to run Athanor's MCP server on your own computerInstall the athanor command line, then point your MCP client at the binary with the argument mcp, for example { "mcpServers": { "athanor": { "command": "C:\\Tools\\athanor.exe", "args": ["mcp"] } } }.