Find, document and execute authenticated API calls across 700+ apps via one MCP server
To add One to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 7 environment variables, listed below.
Install
npx -y @withone/mcp@2.0.0Environment variables
ONE_SECRETSet in your MCP configONE_PERMISSIONSSet in your MCP configONE_CONNECTION_KEYSSet in your MCP configONE_ACTION_IDSSet in your MCP configONE_KNOWLEDGE_AGENTSet in your MCP configONE_IDENTITYSet in your MCP configONE_IDENTITY_TYPESet in your MCP configInstall with your client
claude mcp add one --env ONE_SECRET=<YOUR_ONE_SECRET> --env ONE_PERMISSIONS=<YOUR_ONE_PERMISSIONS> --env ONE_CONNECTION_KEYS=<YOUR_ONE_CONNECTION_KEYS> --env ONE_ACTION_IDS=<YOUR_ONE_ACTION_IDS> --env ONE_KNOWLEDGE_AGENT=<YOUR_ONE_KNOWLEDGE_AGENT> --env ONE_IDENTITY=<YOUR_ONE_IDENTITY> --env ONE_IDENTITY_TYPE=<YOUR_ONE_IDENTITY_TYPE> -- npx -y @withone/mcp@2.0.0
Run this in a terminal to add the server to Claude Code.
What this does
One exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
ONE_SECRET ONE_PERMISSIONS ONE_CONNECTION_KEYS ONE_ACTION_IDS ONE_KNOWLEDGE_AGENT ONE_IDENTITY ONE_IDENTITY_TYPE
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install One?
Run the Claude Code command in the install section to add One to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with One?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to One as well.
Does One need an API key?
Yes. Before it can run, set these environment variables: ONE_SECRET, ONE_PERMISSIONS, ONE_CONNECTION_KEYS, ONE_ACTION_IDS, ONE_KNOWLEDGE_AGENT, ONE_IDENTITY, ONE_IDENTITY_TYPE. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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